39 lines
1.2 KiB
LLVM
39 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; %cmp should not vanish
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define i1 @f(i32 %i1) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I1:%.*]], 0
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; CHECK-NEXT: [[SHR:%.*]] = lshr i32 7, [[I1]]
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; CHECK-NEXT: [[CMP4:%.*]] = icmp slt i32 [[SHR]], [[I1]]
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; CHECK-NEXT: [[I2:%.*]] = select i1 [[CMP]], i1 true, i1 [[CMP4]]
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; CHECK-NEXT: ret i1 [[I2]]
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;
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entry:
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%cmp = icmp slt i32 %i1, 0
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%shr = ashr i32 7, %i1
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%cmp4 = icmp sgt i32 %i1, %shr
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%i2 = select i1 %cmp, i1 true, i1 %cmp4
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ret i1 %i2
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}
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; %cmp should not vanish
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define i32 @f2(i32 signext %g, i32 zeroext %h) {
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; CHECK-LABEL: @f2(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[G:%.*]], 0
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; CHECK-NEXT: [[SHR:%.*]] = lshr i32 7, [[H:%.*]]
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[SHR]], [[G]]
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; CHECK-NEXT: [[DOT0:%.*]] = select i1 [[CMP]], i1 true, i1 [[CMP1]]
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; CHECK-NEXT: [[LOR_EXT:%.*]] = zext i1 [[DOT0]] to i32
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; CHECK-NEXT: ret i32 [[LOR_EXT]]
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;
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%cmp = icmp slt i32 %g, 0
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%shr = ashr i32 7, %h
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%cmp1 = icmp sgt i32 %g, %shr
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%.0 = select i1 %cmp, i1 true, i1 %cmp1
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%lor.ext = zext i1 %.0 to i32
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ret i32 %lor.ext
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}
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