1f88d80408
As branch on undef is immediate undefined behavior, there is no need to mark one of the edges as feasible. We can leave all the edges non-feasible. In IPSCCP, we can replace the branch with an unreachable terminator. Differential Revision: https://reviews.llvm.org/D126962
24 lines
590 B
LLVM
24 lines
590 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
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; RUN: opt < %s -S -passes=ipsccp | FileCheck %s
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define void @main() {
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; CHECK-LABEL: define {{[^@]+}}@main() {
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; CHECK-NEXT: [[CALL:%.*]] = call i1 @patatino(i1 undef)
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; CHECK-NEXT: ret void
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;
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%call = call i1 @patatino(i1 undef)
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ret void
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}
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define internal i1 @patatino(i1 %a) {
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; CHECK-LABEL: define {{[^@]+}}@patatino
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; CHECK-SAME: (i1 [[A:%.*]]) {
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; CHECK-NEXT: unreachable
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;
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br i1 %a, label %ontrue, label %onfalse
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ontrue:
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ret i1 false
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onfalse:
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ret i1 false
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}
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