55 lines
1.2 KiB
LLVM
55 lines
1.2 KiB
LLVM
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; Test that patterns of transformations which disconnect a region of the call
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; graph mid-traversal and then invalidate it function correctly.
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;
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; RUN: opt -S -passes='cgscc(inline,function(simplify-cfg))' < %s | FileCheck %s
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define internal void @test_scc_internal(i1 %flag) {
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; CHECK-NOT: @test_scc_internal
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entry:
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br i1 %flag, label %then, label %else
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then:
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call void @test_scc_internal(i1 false)
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call void @test_scc_external()
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br label %else
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else:
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ret void
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}
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define void @test_scc_external() {
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; CHECK-LABEL: define void @test_scc_external()
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entry:
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call void @test_scc_internal(i1 false)
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ret void
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}
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define internal void @test_refscc_internal(i1 %flag, i8* %ptr) {
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; CHECK-NOT: @test_refscc_internal
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entry:
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br i1 %flag, label %then, label %else
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then:
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call void @test_refscc_internal(i1 false, i8* bitcast (i8* ()* @test_refscc_external to i8*))
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br label %else
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else:
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ret void
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}
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define i8* @test_refscc_external() {
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; CHECK-LABEL: define i8* @test_refscc_external()
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entry:
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br i1 true, label %then, label %else
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret i8* null
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; CHECK-NEXT: }
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; CHECK-NOT: @test_refscc_internal
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then:
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ret i8* null
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else:
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ret i8* bitcast (void (i1, i8*)* @test_refscc_internal to i8*)
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}
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