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https://github.com/golang/go
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cmd/compile: fix type propagation through s390x SSA rules
This CL fixes two issues: 1. Load ops were initially always lowered to unsigned loads, even for signed types. This was fine by itself however LoadReg ops (used to re-load spilled values) were lowered to signed loads for signed types. This meant that spills could invalidate optimizations that assumed the original unsigned load. 2. Types were not always being maintained correctly through rules designed to eliminate unnecessary zero and sign extensions. Fixes #18906. Change-Id: I95785dcadba03f7e3e94524677e7d8d3d3b9b737 Reviewed-on: https://go-review.googlesource.com/36256 Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Michael Munday
parent
178307c3a7
commit
ddf807fce8
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@ -424,7 +424,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
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p.To.Type = obj.TYPE_MEM
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p.To.Reg = v.Args[0].Reg()
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gc.AddAux2(&p.To, v, sc.Off())
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case ssa.OpCopy, ssa.OpS390XMOVDconvert:
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case ssa.OpCopy, ssa.OpS390XMOVDconvert, ssa.OpS390XMOVDreg:
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if v.Type.IsMemory() {
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return
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}
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@ -433,6 +433,11 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
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if x != y {
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opregreg(moveByType(v.Type), y, x)
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}
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case ssa.OpS390XMOVDnop:
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if v.Reg() != v.Args[0].Reg() {
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v.Fatalf("input[0] and output not in same register %s", v.LongString())
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}
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// nothing to do
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case ssa.OpLoadReg:
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if v.Type.IsFlags() {
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v.Fatalf("load flags not implemented: %v", v.LongString())
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@ -309,9 +309,12 @@
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// Lowering loads
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(Load <t> ptr mem) && (is64BitInt(t) || isPtr(t)) -> (MOVDload ptr mem)
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(Load <t> ptr mem) && is32BitInt(t) -> (MOVWZload ptr mem)
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(Load <t> ptr mem) && is16BitInt(t) -> (MOVHZload ptr mem)
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(Load <t> ptr mem) && (t.IsBoolean() || is8BitInt(t)) -> (MOVBZload ptr mem)
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(Load <t> ptr mem) && is32BitInt(t) && isSigned(t) -> (MOVWload ptr mem)
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(Load <t> ptr mem) && is32BitInt(t) && !isSigned(t) -> (MOVWZload ptr mem)
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(Load <t> ptr mem) && is16BitInt(t) && isSigned(t) -> (MOVHload ptr mem)
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(Load <t> ptr mem) && is16BitInt(t) && !isSigned(t) -> (MOVHZload ptr mem)
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(Load <t> ptr mem) && is8BitInt(t) && isSigned(t) -> (MOVBload ptr mem)
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(Load <t> ptr mem) && (t.IsBoolean() || (is8BitInt(t) && !isSigned(t))) -> (MOVBZload ptr mem)
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(Load <t> ptr mem) && is32BitFloat(t) -> (FMOVSload ptr mem)
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(Load <t> ptr mem) && is64BitFloat(t) -> (FMOVDload ptr mem)
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@ -442,16 +445,20 @@
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// ***************************
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// TODO: Should the optimizations be a separate pass?
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// if a register move has only 1 use, just use the same register without emitting instruction
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// MOVDnop doesn't emit instruction, only for ensuring the type.
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(MOVDreg x) && x.Uses == 1 -> (MOVDnop x)
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// Fold sign extensions into conditional moves of constants.
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// Designed to remove the MOVBZreg inserted by the If lowering.
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(MOVBZreg x:(MOVDLT (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDLE (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDGT (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDGE (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDEQ (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDNE (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDGTnoinv (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDGEnoinv (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> x
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(MOVBZreg x:(MOVDLT (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDLE (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDGT (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDGE (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDEQ (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDNE (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDGTnoinv (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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(MOVBZreg x:(MOVDGEnoinv (MOVDconst [c]) (MOVDconst [d]) _)) && int64(uint8(c)) == c && int64(uint8(d)) == d -> (MOVDreg x)
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// Fold boolean tests into blocks.
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(NE (CMPWconst [0] (MOVDLT (MOVDconst [0]) (MOVDconst [1]) cmp)) yes no) -> (LT cmp yes no)
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@ -584,46 +591,46 @@
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(MOVDNE x y (InvertFlags cmp)) -> (MOVDNE x y cmp)
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// don't extend after proper load
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(MOVBreg x:(MOVBload _ _)) -> x
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(MOVBZreg x:(MOVBZload _ _)) -> x
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(MOVHreg x:(MOVBload _ _)) -> x
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(MOVHreg x:(MOVBZload _ _)) -> x
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(MOVHreg x:(MOVHload _ _)) -> x
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(MOVHZreg x:(MOVBZload _ _)) -> x
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(MOVHZreg x:(MOVHZload _ _)) -> x
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(MOVWreg x:(MOVBload _ _)) -> x
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(MOVWreg x:(MOVBZload _ _)) -> x
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(MOVWreg x:(MOVHload _ _)) -> x
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(MOVWreg x:(MOVHZload _ _)) -> x
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(MOVWreg x:(MOVWload _ _)) -> x
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(MOVWZreg x:(MOVBZload _ _)) -> x
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(MOVWZreg x:(MOVHZload _ _)) -> x
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(MOVWZreg x:(MOVWZload _ _)) -> x
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(MOVBreg x:(MOVBload _ _)) -> (MOVDreg x)
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(MOVBZreg x:(MOVBZload _ _)) -> (MOVDreg x)
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(MOVHreg x:(MOVBload _ _)) -> (MOVDreg x)
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(MOVHreg x:(MOVBZload _ _)) -> (MOVDreg x)
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(MOVHreg x:(MOVHload _ _)) -> (MOVDreg x)
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(MOVHZreg x:(MOVBZload _ _)) -> (MOVDreg x)
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(MOVHZreg x:(MOVHZload _ _)) -> (MOVDreg x)
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(MOVWreg x:(MOVBload _ _)) -> (MOVDreg x)
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(MOVWreg x:(MOVBZload _ _)) -> (MOVDreg x)
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(MOVWreg x:(MOVHload _ _)) -> (MOVDreg x)
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(MOVWreg x:(MOVHZload _ _)) -> (MOVDreg x)
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(MOVWreg x:(MOVWload _ _)) -> (MOVDreg x)
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(MOVWZreg x:(MOVBZload _ _)) -> (MOVDreg x)
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(MOVWZreg x:(MOVHZload _ _)) -> (MOVDreg x)
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(MOVWZreg x:(MOVWZload _ _)) -> (MOVDreg x)
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// don't extend if argument is already extended
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(MOVBreg x:(Arg <t>)) && is8BitInt(t) && isSigned(t) -> x
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(MOVBZreg x:(Arg <t>)) && is8BitInt(t) && !isSigned(t) -> x
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(MOVHreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t)) && isSigned(t) -> x
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(MOVHZreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t)) && !isSigned(t) -> x
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(MOVWreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && isSigned(t) -> x
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(MOVWZreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && !isSigned(t) -> x
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(MOVBreg x:(Arg <t>)) && is8BitInt(t) && isSigned(t) -> (MOVDreg x)
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(MOVBZreg x:(Arg <t>)) && is8BitInt(t) && !isSigned(t) -> (MOVDreg x)
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(MOVHreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t)) && isSigned(t) -> (MOVDreg x)
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(MOVHZreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t)) && !isSigned(t) -> (MOVDreg x)
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(MOVWreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && isSigned(t) -> (MOVDreg x)
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(MOVWZreg x:(Arg <t>)) && (is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && !isSigned(t) -> (MOVDreg x)
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// fold double extensions
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(MOVBreg x:(MOVBreg _)) -> x
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(MOVBZreg x:(MOVBZreg _)) -> x
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(MOVHreg x:(MOVBreg _)) -> x
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(MOVHreg x:(MOVBZreg _)) -> x
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(MOVHreg x:(MOVHreg _)) -> x
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(MOVHZreg x:(MOVBZreg _)) -> x
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(MOVHZreg x:(MOVHZreg _)) -> x
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(MOVWreg x:(MOVBreg _)) -> x
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(MOVWreg x:(MOVBZreg _)) -> x
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(MOVWreg x:(MOVHreg _)) -> x
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(MOVWreg x:(MOVHreg _)) -> x
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(MOVWreg x:(MOVWreg _)) -> x
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(MOVWZreg x:(MOVBZreg _)) -> x
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(MOVWZreg x:(MOVHZreg _)) -> x
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(MOVWZreg x:(MOVWZreg _)) -> x
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(MOVBreg x:(MOVBreg _)) -> (MOVDreg x)
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(MOVBZreg x:(MOVBZreg _)) -> (MOVDreg x)
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(MOVHreg x:(MOVBreg _)) -> (MOVDreg x)
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(MOVHreg x:(MOVBZreg _)) -> (MOVDreg x)
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(MOVHreg x:(MOVHreg _)) -> (MOVDreg x)
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(MOVHZreg x:(MOVBZreg _)) -> (MOVDreg x)
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(MOVHZreg x:(MOVHZreg _)) -> (MOVDreg x)
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(MOVWreg x:(MOVBreg _)) -> (MOVDreg x)
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(MOVWreg x:(MOVBZreg _)) -> (MOVDreg x)
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(MOVWreg x:(MOVHreg _)) -> (MOVDreg x)
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(MOVWreg x:(MOVHreg _)) -> (MOVDreg x)
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(MOVWreg x:(MOVWreg _)) -> (MOVDreg x)
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(MOVWZreg x:(MOVBZreg _)) -> (MOVDreg x)
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(MOVWZreg x:(MOVHZreg _)) -> (MOVDreg x)
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(MOVWZreg x:(MOVWZreg _)) -> (MOVDreg x)
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// fold extensions into constants
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(MOVBreg (MOVDconst [c])) -> (MOVDconst [int64(int8(c))])
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@ -653,10 +660,10 @@
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(MOVWZreg x:(MOVWZloadidx [off] {sym} ptr idx mem)) && x.Uses == 1 && clobber(x) -> @x.Block (MOVWZloadidx <v.Type> [off] {sym} ptr idx mem)
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// replace load from same location as preceding store with copy
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(MOVBZload [off] {sym} ptr (MOVBstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> x
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(MOVHZload [off] {sym} ptr (MOVHstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> x
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(MOVWZload [off] {sym} ptr (MOVWstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> x
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(MOVDload [off] {sym} ptr (MOVDstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> x
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(MOVBZload [off] {sym} ptr (MOVBstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> (MOVDreg x)
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(MOVHZload [off] {sym} ptr (MOVHstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> (MOVDreg x)
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(MOVWZload [off] {sym} ptr (MOVWstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> (MOVDreg x)
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(MOVDload [off] {sym} ptr (MOVDstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) -> (MOVDreg x)
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// Don't extend before storing
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(MOVWstore [off] {sym} ptr (MOVWreg x) mem) -> (MOVWstore [off] {sym} ptr x mem)
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@ -311,6 +311,9 @@ func init() {
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{name: "MOVHZreg", argLength: 1, reg: gp11sp, asm: "MOVHZ", typ: "UInt64"}, // zero extend arg0 from int16 to int64
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{name: "MOVWreg", argLength: 1, reg: gp11sp, asm: "MOVW", typ: "Int64"}, // sign extend arg0 from int32 to int64
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{name: "MOVWZreg", argLength: 1, reg: gp11sp, asm: "MOVWZ", typ: "UInt64"}, // zero extend arg0 from int32 to int64
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{name: "MOVDreg", argLength: 1, reg: gp11sp, asm: "MOVD"}, // move from arg0
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{name: "MOVDnop", argLength: 1, reg: gp11, resultInArg0: true}, // nop, return arg0 in same register
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{name: "MOVDconst", reg: gp01, asm: "MOVD", typ: "UInt64", aux: "Int64", rematerializeable: true}, // auxint
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@ -1473,6 +1473,8 @@ const (
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OpS390XMOVHZreg
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OpS390XMOVWreg
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OpS390XMOVWZreg
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OpS390XMOVDreg
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OpS390XMOVDnop
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OpS390XMOVDconst
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OpS390XCFDBRA
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OpS390XCGDBRA
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@ -18578,6 +18580,32 @@ var opcodeTable = [...]opInfo{
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},
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},
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},
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{
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name: "MOVDreg",
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argLen: 1,
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asm: s390x.AMOVD,
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reg: regInfo{
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inputs: []inputInfo{
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{0, 54271}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14 SP
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},
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outputs: []outputInfo{
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{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
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},
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},
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},
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{
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name: "MOVDnop",
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argLen: 1,
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resultInArg0: true,
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reg: regInfo{
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inputs: []inputInfo{
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{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
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},
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outputs: []outputInfo{
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{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
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},
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},
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},
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{
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name: "MOVDconst",
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auxType: auxInt64,
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@ -520,6 +520,8 @@ func rewriteValueS390X(v *Value, config *Config) bool {
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return rewriteValueS390X_OpS390XMOVDload(v, config)
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case OpS390XMOVDloadidx:
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return rewriteValueS390X_OpS390XMOVDloadidx(v, config)
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case OpS390XMOVDreg:
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return rewriteValueS390X_OpS390XMOVDreg(v, config)
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case OpS390XMOVDstore:
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return rewriteValueS390X_OpS390XMOVDstore(v, config)
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case OpS390XMOVDstoreconst:
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@ -3232,13 +3234,28 @@ func rewriteValueS390X_OpLoad(v *Value, config *Config) bool {
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return true
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}
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// match: (Load <t> ptr mem)
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// cond: is32BitInt(t)
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// cond: is32BitInt(t) && isSigned(t)
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// result: (MOVWload ptr mem)
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for {
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t := v.Type
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ptr := v.Args[0]
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mem := v.Args[1]
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if !(is32BitInt(t) && isSigned(t)) {
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break
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}
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v.reset(OpS390XMOVWload)
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v.AddArg(ptr)
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v.AddArg(mem)
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return true
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}
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// match: (Load <t> ptr mem)
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// cond: is32BitInt(t) && !isSigned(t)
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// result: (MOVWZload ptr mem)
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for {
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t := v.Type
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ptr := v.Args[0]
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mem := v.Args[1]
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if !(is32BitInt(t)) {
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if !(is32BitInt(t) && !isSigned(t)) {
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break
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}
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v.reset(OpS390XMOVWZload)
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@ -3247,13 +3264,28 @@ func rewriteValueS390X_OpLoad(v *Value, config *Config) bool {
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return true
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}
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// match: (Load <t> ptr mem)
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// cond: is16BitInt(t)
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// cond: is16BitInt(t) && isSigned(t)
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// result: (MOVHload ptr mem)
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for {
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t := v.Type
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ptr := v.Args[0]
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mem := v.Args[1]
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if !(is16BitInt(t) && isSigned(t)) {
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break
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}
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v.reset(OpS390XMOVHload)
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v.AddArg(ptr)
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v.AddArg(mem)
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return true
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}
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// match: (Load <t> ptr mem)
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// cond: is16BitInt(t) && !isSigned(t)
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// result: (MOVHZload ptr mem)
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for {
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t := v.Type
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ptr := v.Args[0]
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mem := v.Args[1]
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if !(is16BitInt(t)) {
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if !(is16BitInt(t) && !isSigned(t)) {
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break
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}
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v.reset(OpS390XMOVHZload)
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@ -3262,13 +3294,28 @@ func rewriteValueS390X_OpLoad(v *Value, config *Config) bool {
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return true
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}
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// match: (Load <t> ptr mem)
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// cond: (t.IsBoolean() || is8BitInt(t))
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// cond: is8BitInt(t) && isSigned(t)
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// result: (MOVBload ptr mem)
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for {
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t := v.Type
|
||||
ptr := v.Args[0]
|
||||
mem := v.Args[1]
|
||||
if !(is8BitInt(t) && isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpS390XMOVBload)
|
||||
v.AddArg(ptr)
|
||||
v.AddArg(mem)
|
||||
return true
|
||||
}
|
||||
// match: (Load <t> ptr mem)
|
||||
// cond: (t.IsBoolean() || (is8BitInt(t) && !isSigned(t)))
|
||||
// result: (MOVBZload ptr mem)
|
||||
for {
|
||||
t := v.Type
|
||||
ptr := v.Args[0]
|
||||
mem := v.Args[1]
|
||||
if !(t.IsBoolean() || is8BitInt(t)) {
|
||||
if !(t.IsBoolean() || (is8BitInt(t) && !isSigned(t))) {
|
||||
break
|
||||
}
|
||||
v.reset(OpS390XMOVBZload)
|
||||
|
|
@ -7864,7 +7911,7 @@ func rewriteValueS390X_OpS390XMOVBZload(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVBZload [off] {sym} ptr (MOVBstore [off2] {sym2} ptr2 x _))
|
||||
// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
off := v.AuxInt
|
||||
sym := v.Aux
|
||||
|
|
@ -7880,8 +7927,7 @@ func rewriteValueS390X_OpS390XMOVBZload(v *Value, config *Config) bool {
|
|||
if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -8038,7 +8084,7 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVBZreg x:(MOVDLT (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDLT {
|
||||
|
|
@ -8057,14 +8103,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDLE (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDLE {
|
||||
|
|
@ -8083,14 +8128,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDGT (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDGT {
|
||||
|
|
@ -8109,14 +8153,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDGE (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDGE {
|
||||
|
|
@ -8135,14 +8178,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDEQ (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDEQ {
|
||||
|
|
@ -8161,14 +8203,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDNE (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDNE {
|
||||
|
|
@ -8187,14 +8228,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDGTnoinv (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDGTnoinv {
|
||||
|
|
@ -8213,14 +8253,13 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVDGEnoinv (MOVDconst [c]) (MOVDconst [d]) _))
|
||||
// cond: int64(uint8(c)) == c && int64(uint8(d)) == d
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVDGEnoinv {
|
||||
|
|
@ -8239,27 +8278,25 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(int64(uint8(c)) == c && int64(uint8(d)) == d) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVBZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(Arg <t>))
|
||||
// cond: is8BitInt(t) && !isSigned(t)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpArg {
|
||||
|
|
@ -8269,21 +8306,19 @@ func rewriteValueS390X_OpS390XMOVBZreg(v *Value, config *Config) bool {
|
|||
if !(is8BitInt(t) && !isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBZreg x:(MOVBZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -8411,20 +8446,19 @@ func rewriteValueS390X_OpS390XMOVBreg(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVBreg x:(MOVBload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBreg x:(Arg <t>))
|
||||
// cond: is8BitInt(t) && isSigned(t)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpArg {
|
||||
|
|
@ -8434,21 +8468,19 @@ func rewriteValueS390X_OpS390XMOVBreg(v *Value, config *Config) bool {
|
|||
if !(is8BitInt(t) && isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVBreg x:(MOVBreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -10057,7 +10089,7 @@ func rewriteValueS390X_OpS390XMOVDload(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVDload [off] {sym} ptr (MOVDstore [off2] {sym2} ptr2 x _))
|
||||
// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
off := v.AuxInt
|
||||
sym := v.Aux
|
||||
|
|
@ -10073,8 +10105,7 @@ func rewriteValueS390X_OpS390XMOVDload(v *Value, config *Config) bool {
|
|||
if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -10226,6 +10257,23 @@ func rewriteValueS390X_OpS390XMOVDloadidx(v *Value, config *Config) bool {
|
|||
}
|
||||
return false
|
||||
}
|
||||
func rewriteValueS390X_OpS390XMOVDreg(v *Value, config *Config) bool {
|
||||
b := v.Block
|
||||
_ = b
|
||||
// match: (MOVDreg x)
|
||||
// cond: x.Uses == 1
|
||||
// result: (MOVDnop x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if !(x.Uses == 1) {
|
||||
break
|
||||
}
|
||||
v.reset(OpS390XMOVDnop)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
func rewriteValueS390X_OpS390XMOVDstore(v *Value, config *Config) bool {
|
||||
b := v.Block
|
||||
_ = b
|
||||
|
|
@ -10974,7 +11022,7 @@ func rewriteValueS390X_OpS390XMOVHZload(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVHZload [off] {sym} ptr (MOVHstore [off2] {sym2} ptr2 x _))
|
||||
// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
off := v.AuxInt
|
||||
sym := v.Aux
|
||||
|
|
@ -10990,8 +11038,7 @@ func rewriteValueS390X_OpS390XMOVHZload(v *Value, config *Config) bool {
|
|||
if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -11148,33 +11195,31 @@ func rewriteValueS390X_OpS390XMOVHZreg(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVHZreg x:(MOVBZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHZreg x:(MOVHZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHZreg x:(Arg <t>))
|
||||
// cond: (is8BitInt(t) || is16BitInt(t)) && !isSigned(t)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpArg {
|
||||
|
|
@ -11184,34 +11229,31 @@ func rewriteValueS390X_OpS390XMOVHZreg(v *Value, config *Config) bool {
|
|||
if !((is8BitInt(t) || is16BitInt(t)) && !isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHZreg x:(MOVBZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHZreg x:(MOVHZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -11339,46 +11381,43 @@ func rewriteValueS390X_OpS390XMOVHreg(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVHreg x:(MOVBload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHreg x:(MOVBZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHreg x:(MOVHload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHreg x:(Arg <t>))
|
||||
// cond: (is8BitInt(t) || is16BitInt(t)) && isSigned(t)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpArg {
|
||||
|
|
@ -11388,47 +11427,43 @@ func rewriteValueS390X_OpS390XMOVHreg(v *Value, config *Config) bool {
|
|||
if !((is8BitInt(t) || is16BitInt(t)) && isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHreg x:(MOVBreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHreg x:(MOVBZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVHreg x:(MOVHreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -12372,7 +12407,7 @@ func rewriteValueS390X_OpS390XMOVWZload(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVWZload [off] {sym} ptr (MOVWstore [off2] {sym2} ptr2 x _))
|
||||
// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
off := v.AuxInt
|
||||
sym := v.Aux
|
||||
|
|
@ -12388,8 +12423,7 @@ func rewriteValueS390X_OpS390XMOVWZload(v *Value, config *Config) bool {
|
|||
if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -12546,46 +12580,43 @@ func rewriteValueS390X_OpS390XMOVWZreg(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVWZreg x:(MOVBZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWZreg x:(MOVHZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWZreg x:(MOVWZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVWZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWZreg x:(Arg <t>))
|
||||
// cond: (is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && !isSigned(t)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpArg {
|
||||
|
|
@ -12595,47 +12626,43 @@ func rewriteValueS390X_OpS390XMOVWZreg(v *Value, config *Config) bool {
|
|||
if !((is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && !isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWZreg x:(MOVBZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWZreg x:(MOVHZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWZreg x:(MOVWZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVWZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
@ -12763,72 +12790,67 @@ func rewriteValueS390X_OpS390XMOVWreg(v *Value, config *Config) bool {
|
|||
_ = b
|
||||
// match: (MOVWreg x:(MOVBload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVBZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVHload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVHZload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHZload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVWload _ _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVWload {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(Arg <t>))
|
||||
// cond: (is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && isSigned(t)
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpArg {
|
||||
|
|
@ -12838,73 +12860,67 @@ func rewriteValueS390X_OpS390XMOVWreg(v *Value, config *Config) bool {
|
|||
if !((is8BitInt(t) || is16BitInt(t) || is32BitInt(t)) && isSigned(t)) {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVBreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVBZreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVBZreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVHreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVHreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVHreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
// match: (MOVWreg x:(MOVWreg _))
|
||||
// cond:
|
||||
// result: x
|
||||
// result: (MOVDreg x)
|
||||
for {
|
||||
x := v.Args[0]
|
||||
if x.Op != OpS390XMOVWreg {
|
||||
break
|
||||
}
|
||||
v.reset(OpCopy)
|
||||
v.Type = x.Type
|
||||
v.reset(OpS390XMOVDreg)
|
||||
v.AddArg(x)
|
||||
return true
|
||||
}
|
||||
|
|
|
|||
36
test/fixedbugs/issue18906.go
Normal file
36
test/fixedbugs/issue18906.go
Normal file
|
|
@ -0,0 +1,36 @@
|
|||
// run
|
||||
|
||||
// Copyright 2017 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package main
|
||||
|
||||
//go:noinline
|
||||
func f(x int) {
|
||||
}
|
||||
|
||||
//go:noinline
|
||||
func val() int8 {
|
||||
return -1
|
||||
}
|
||||
|
||||
var (
|
||||
array = [257]int{}
|
||||
slice = array[1:]
|
||||
)
|
||||
|
||||
func init() {
|
||||
for i := range array {
|
||||
array[i] = i - 1
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
x := val()
|
||||
y := int(uint8(x))
|
||||
f(y) // try and force y to be calculated and spilled
|
||||
if slice[y] != 255 {
|
||||
panic("incorrect value")
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue