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22 lines
626 B
LLVM
22 lines
626 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; Remove an icmp by using its operand in the subsequent logic directly.
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define i8 @zext_or_icmp_icmp(i8 %a, i8 %b) {
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%mask = and i8 %a, 1
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%toBool1 = icmp eq i8 %mask, 0
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%toBool2 = icmp eq i8 %b, 0
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%bothCond = or i1 %toBool1, %toBool2
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%zext = zext i1 %bothCond to i8
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ret i8 %zext
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; CHECK-LABEL: zext_or_icmp_icmp(
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; CHECK-NEXT: %mask = and i8 %a, 1
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; CHECK-NEXT: %toBool2 = icmp eq i8 %b, 0
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; CHECK-NEXT: %1 = xor i8 %mask, 1
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; CHECK-NEXT: %toBool22 = zext i1 %toBool2 to i8
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; CHECK-NEXT: %zext = or i8 %1, %toBool22
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; CHECK-NEXT: ret i8 %zext
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}
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