From 0a96144aac449114330a5264b649eb449dc19a37 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 12 Jul 2010 00:47:34 +0000 Subject: if jump threading is able to infer interesting values on both the LHS and RHS of an and/or instruction, don't multiply add known predecessor values. This fixes the crash on testcase from PR7498 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108114 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/JumpThreading/crash.ll | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'test/Transforms') diff --git a/test/Transforms/JumpThreading/crash.ll b/test/Transforms/JumpThreading/crash.ll index 378c51a44a..480b4a04ee 100644 --- a/test/Transforms/JumpThreading/crash.ll +++ b/test/Transforms/JumpThreading/crash.ll @@ -363,3 +363,27 @@ F: ret i32 1422 } + +; PR7498 +define void @test14() nounwind { +entry: + %cmp33 = icmp slt i8 undef, 0 ; [#uses=1] + %tobool = icmp eq i8 undef, 0 ; [#uses=1] + br i1 %tobool, label %land.end69, label %land.rhs + +land.rhs: ; preds = %entry + br label %land.end69 + +land.end69: ; preds = %land.rhs, %entry + %0 = phi i1 [ undef, %land.rhs ], [ true, %entry ] ; [#uses=1] + %cmp71 = or i1 true, %0 ; [#uses=1] + %cmp73 = xor i1 %cmp33, %cmp71 ; [#uses=1] + br i1 %cmp73, label %if.then, label %if.end + +if.then: ; preds = %land.end69 + ret void + +if.end: ; preds = %land.end69 + ret void +} + -- cgit v1.2.3