From 2f0843321016091dca890c819741e06f11ceb390 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Sun, 29 Sep 2013 19:39:13 +0000 Subject: ObjectSizeOffsetEvaluator: Don't run into infinite recursion if we have a cyclic GEP. Those can occur in dead code. PR17402. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191644 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Instrumentation/BoundsChecking/simple.ll | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'test/Instrumentation') diff --git a/test/Instrumentation/BoundsChecking/simple.ll b/test/Instrumentation/BoundsChecking/simple.ll index 16870c7..72b58f4 100644 --- a/test/Instrumentation/BoundsChecking/simple.ll +++ b/test/Instrumentation/BoundsChecking/simple.ll @@ -126,3 +126,20 @@ define i64 @f12(i64 %x, i64 %y) nounwind { %4 = load i64* %3, align 8 ret i64 %4 } + +; PR17402 +; CHECK-LABEL: @f13 +define void @f13() nounwind { +entry: + br label %alive + +dead: + ; Self-refential GEPs can occur in dead code. + %incdec.ptr = getelementptr inbounds i32* %incdec.ptr, i64 1 + ; CHECK: %incdec.ptr = getelementptr inbounds i32* %incdec.ptr + %l = load i32* %incdec.ptr + br label %alive + +alive: + ret void +} -- cgit v1.1