forked from OSchip/llvm-project
32 lines
834 B
LLVM
32 lines
834 B
LLVM
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; RUN: opt < %s -inline -instcombine -S | FileCheck %s
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; This test case exposed a bug in instcombine where the early
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; DCE of a call wasn't recognized as changing the IR.
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; So when runOnFunction propagated the "made changes" upwards
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; to the CallGraphSCCPass it signalled that no changes had been
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; made, so CallGraphSCCPass assumed that the old CallGraph,
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; as known by that pass manager, still was up-to-date.
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;
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; This was detected as an assert when trying to remove the
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; no longer used function 'bar' (due to incorrect reference
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; count in the CallGraph).
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attributes #0 = { noinline norecurse nounwind readnone }
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define void @foo() #0 {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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;
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entry:
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%call = call i32 @bar()
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ret void
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}
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define internal i32 @bar() #0 {
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; CHECK-NOT: bar
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entry:
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ret i32 42
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}
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