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https://github.com/rust-lang/rust
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e70cf014b8
llvm/llvm-project#87910 infers `nuw` and `nsw` on some `trunc` instructions we're doing `FileCheck` on. Tolerate but don't require them to support both release and head LLVM.
37 lines
915 B
Rust
37 lines
915 B
Rust
//@ compile-flags: -C opt-level=1
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#![crate_type = "lib"]
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#![feature(ascii_char)]
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use std::ascii::Char as AsciiChar;
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// CHECK-LABEL: i8 @unwrap_digit_from_remainder(i32
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#[no_mangle]
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pub fn unwrap_digit_from_remainder(v: u32) -> AsciiChar {
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// CHECK-NOT: icmp
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// CHECK-NOT: panic
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// CHECK: %[[R:.+]] = urem i32 %v, 10
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// CHECK-NEXT: %[[T:.+]] = trunc{{( nuw)?( nsw)?}} i32 %[[R]] to i8
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// CHECK-NEXT: %[[D:.+]] = or{{( disjoint)?}} i8 %[[T]], 48
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// CHECK-NEXT: ret i8 %[[D]]
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// CHECK-NOT: icmp
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// CHECK-NOT: panic
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AsciiChar::digit((v % 10) as u8).unwrap()
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}
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// CHECK-LABEL: i8 @unwrap_from_masked(i8
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#[no_mangle]
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pub fn unwrap_from_masked(b: u8) -> AsciiChar {
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// CHECK-NOT: icmp
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// CHECK-NOT: panic
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// CHECK: %[[M:.+]] = and i8 %b, 127
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// CHECK-NEXT: ret i8 %[[M]]
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// CHECK-NOT: icmp
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// CHECK-NOT: panic
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AsciiChar::from_u8(b & 0x7f).unwrap()
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}
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