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cmd/compile, runtime: stop padding stackmaps to 4 bytes
Shrinks cmd/go's text segment by 0.9%. text data bss dec hex filename 6447148 231643 146328 6825119 68249f go.before 6387404 231643 146328 6765375 673b3f go.after Change-Id: I431e8482dbb11a7c1c77f2196cada43d5dad2981 Reviewed-on: https://go-review.googlesource.com/30817 Reviewed-by: Austin Clements <austin@google.com>
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@ -272,14 +272,10 @@ func duintptr(s *Sym, off int, v uint64) int {
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}
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func dbvec(s *Sym, off int, bv bvec) int {
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for j := 0; int32(j) < bv.n; j += 32 {
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// Runtime reads the bitmaps as byte arrays. Oblige.
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for j := 0; int32(j) < bv.n; j += 8 {
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word := bv.b[j/32]
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// Runtime reads the bitmaps as byte arrays. Oblige.
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off = duint8(s, off, uint8(word))
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off = duint8(s, off, uint8(word>>8))
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off = duint8(s, off, uint8(word>>16))
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off = duint8(s, off, uint8(word>>24))
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off = duint8(s, off, uint8(word>>(uint(j)%32)))
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}
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return off
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}
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@ -603,5 +603,5 @@ func stackmapdata(stkmap *stackmap, n int32) bitvector {
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if n < 0 || n >= stkmap.n {
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throw("stackmapdata: index out of range")
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}
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return bitvector{stkmap.nbit, (*byte)(add(unsafe.Pointer(&stkmap.bytedata), uintptr(n*((stkmap.nbit+31)/32*4))))}
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return bitvector{stkmap.nbit, (*byte)(add(unsafe.Pointer(&stkmap.bytedata), uintptr(n*((stkmap.nbit+7)/8))))}
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}
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