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9e7800b23b
We can't create metadata-valued PHIs; don't try to do so when sinking.
I created a test case for this using the @llvm.type.test intrinsic, because it
takes a metadata parameter and does not have severe side effects (thus
SimplifyCFG is willing to otherwise sink it).
Previously, running the test case would crash with:
Invalid use of metadata!
%.sink = select i1 %flag, metadata <...>, metadata <0x4e45dc0>
LLVM ERROR: Broken function found, compilation aborted!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280866 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.1 KiB
LLVM
52 lines
1.1 KiB
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
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define i1 @test1(i1 zeroext %flag, i8* %y) #0 {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%r = call i1 @llvm.type.test(i8* %y, metadata !0)
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br label %if.end
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if.else:
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%s = call i1 @llvm.type.test(i8* %y, metadata !1)
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br label %if.end
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if.end:
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%t = phi i1 [ %s, %if.else ], [ %r, %if.then ]
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ret i1 %t
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}
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!0 = !{i32 0, !"typeid1"}
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!1 = !{i32 4, !"typeid1"}
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declare i1 @llvm.type.test(i8* %ptr, metadata %bitset) nounwind readnone
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; CHECK-LABEL: test1
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; CHECK: @llvm.type.test
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; CHECK: @llvm.type.test
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; CHECK: ret i1
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define i1 @test2(i1 zeroext %flag, i8* %y, i8* %z) #0 {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%r = call i1 @llvm.type.test(i8* %y, metadata !0)
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br label %if.end
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if.else:
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%s = call i1 @llvm.type.test(i8* %z, metadata !0)
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br label %if.end
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if.end:
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%t = phi i1 [ %s, %if.else ], [ %r, %if.then ]
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ret i1 %t
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}
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; CHECK-LABEL: test2
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; CHECK: %[[S:[a-z0-9.]+]] = select i1 %flag, i8* %y, i8* %z
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; CHECK: %[[R:[a-z0-9.]+]] = call i1 @llvm.type.test(i8* %[[S]], metadata !0)
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; CHECK: ret i1 %[[R]]
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