forked from OSchip/llvm-project
37 lines
1.1 KiB
LLVM
37 lines
1.1 KiB
LLVM
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; 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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; We used to hit an assertion in getFlippedStrictnessPredicateAndConstant due
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; to assuming that edge cases such as %cmp (ult x, 0) already has been
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; simplified. But that depends on the worklist order, so that is not always
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; guaranteed.
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define i16 @d(i16* %d.a, i16* %d.b) {
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; CHECK-LABEL: @d(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T0:%.*]] = load i16, i16* [[D_A:%.*]], align 1
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i16 [[T0]], 0
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; CHECK-NEXT: br i1 [[TOBOOL]], label [[LAND_END:%.*]], label [[LAND_RHS:%.*]]
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; CHECK: land.rhs:
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; CHECK-NEXT: br label [[LAND_END]]
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; CHECK: land.end:
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; CHECK-NEXT: ret i16 -1
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;
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entry:
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%t0 = load i16, i16* %d.a, align 1
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%tobool = icmp ne i16 %t0, 0
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br i1 %tobool, label %land.rhs, label %land.end
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land.rhs:
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%t1 = load i16, i16* %d.b, align 1
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%cmp = icmp ult i16 %t1, 0
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br label %land.end
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land.end:
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%t2 = phi i1 [ false, %entry ], [ %cmp, %land.rhs ]
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%land.ext = zext i1 %t2 to i16
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%mul = mul nsw i16 %land.ext, 3
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%neg = xor i16 %mul, -1
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ret i16 %neg
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}
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