d7600c7ccb
In the spirit of D130765 . Get rid of cbranches and/or cmov. Usually shorter, but sometime not, becaus eit's hard to prededict when dependency breaking xor will be introduced. Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D134736
29 lines
919 B
LLVM
29 lines
919 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i386-unknown-linux-gnu -mcpu=corei7-avx -enable-misched=false | FileCheck %s
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define i64 @main(i1 %tobool1) nounwind {
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; CHECK-LABEL: main:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: andl $1, %eax
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; CHECK-NEXT: decl %eax
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; CHECK-NEXT: orl $-12, %eax
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; CHECK-NEXT: xorl %ecx, %ecx
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: addl $-1, %edx
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; CHECK-NEXT: movl $0, %edx
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; CHECK-NEXT: adcl $-2, %edx
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; CHECK-NEXT: cmovsl %ecx, %eax
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; CHECK-NEXT: xorl %edx, %edx
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; CHECK-NEXT: retl
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entry:
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%0 = zext i1 %tobool1 to i32
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%. = xor i32 %0, 1
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%.21 = select i1 %tobool1, i32 -12, i32 -1
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%conv = sext i32 %.21 to i64
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%1 = add i64 %conv, -1
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%cmp10 = icmp slt i64 %1, 0
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%sub17 = select i1 %cmp10, i64 0, i64 %conv
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ret i64 %sub17
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}
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