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https://github.com/c64scene-ar/llvm-6502.git
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d336de318e
(movzx/movsx) because they give more information. Revert that part of the patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129498 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
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; rdar://7329206
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; Use sbb x, x to materialize carry bit in a GPR. The value is either
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; all 1's or all 0's.
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define zeroext i16 @t1(i16 zeroext %x) nounwind readnone ssp {
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entry:
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; CHECK: t1:
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; CHECK: seta %al
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; CHECK: movzbl %al, %eax
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; CHECK: shll $5, %eax
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%0 = icmp ugt i16 %x, 26 ; <i1> [#uses=1]
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%iftmp.1.0 = select i1 %0, i16 32, i16 0 ; <i16> [#uses=1]
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ret i16 %iftmp.1.0
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}
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define zeroext i16 @t2(i16 zeroext %x) nounwind readnone ssp {
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entry:
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; CHECK: t2:
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; CHECK: sbbl %eax, %eax
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; CHECK: andl $32, %eax
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%0 = icmp ult i16 %x, 26 ; <i1> [#uses=1]
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%iftmp.0.0 = select i1 %0, i16 32, i16 0 ; <i16> [#uses=1]
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ret i16 %iftmp.0.0
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}
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define i64 @t3(i64 %x) nounwind readnone ssp {
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entry:
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; CHECK: t3:
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; CHECK: sbbq %rax, %rax
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; CHECK: andq $64, %rax
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%0 = icmp ult i64 %x, 18 ; <i1> [#uses=1]
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%iftmp.2.0 = select i1 %0, i64 64, i64 0 ; <i64> [#uses=1]
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ret i64 %iftmp.2.0
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}
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