38 lines
922 B
LLVM
38 lines
922 B
LLVM
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; RUN: opt -codegenprepare -S -mtriple=x86_64 < %s | FileCheck %s
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; Test that an invalid CFG is not created by splitIndirectCriticalEdges
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; transformation when the 'target' block is a loop to itself.
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; CHECK: .split:
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; CHECK: br label %while.body.clone
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; CHECK: if.else1:
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; CHECK: indirectbr
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; CHECK: while.body.clone:
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; CHECK: br label %.split
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define void @test() {
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entry:
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br label %if.else
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if.else:
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br i1 undef, label %while.body, label %preheader
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preheader:
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br label %if.else1
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if.then:
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unreachable
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while.body:
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%dest.sroa = phi i32 [ %1, %while.body ], [ undef, %if.else1 ], [ undef, %if.else ]
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%0 = inttoptr i32 %dest.sroa to i8*
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%incdec.ptr = getelementptr inbounds i8, i8* %0, i32 -1
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%1 = ptrtoint i8* %incdec.ptr to i32
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store i8 undef, i8* %incdec.ptr, align 1
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br label %while.body
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if.else1:
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indirectbr i8* undef, [label %if.then, label %while.body, label %if.else, label %if.else1]
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}
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