47 lines
865 B
LLVM
47 lines
865 B
LLVM
; RUN: opt -simplifycfg < %s -S | FileCheck %s
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; The dead code would cause a select that had itself
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; as an operand to be analyzed. This would then cause
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; infinite recursion and eventual crash.
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define void @PR36045(i1 %t, i32* %b) {
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; CHECK-LABEL: @PR36045(
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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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br i1 %t, label %if, label %end
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if:
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br i1 %t, label %unreach, label %pre
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unreach:
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unreachable
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pre:
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%p = phi i32 [ 70, %if ], [ %sel, %for ]
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br label %for
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for:
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%cmp = icmp sgt i32 %p, 8
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%add = add i32 %p, 2
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%sel = select i1 %cmp, i32 %p, i32 %add
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%cmp21 = icmp ult i32 %sel, 21
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br i1 %cmp21, label %pre, label %for.end
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for.end:
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br i1 %t, label %unreach2, label %then12
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then12:
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store i32 0, i32* %b
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br label %unreach2
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unreach2:
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%spec = phi i32 [ %sel, %for.end ], [ 42, %then12 ]
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unreachable
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end:
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ret void
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}
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