From b5714633638a82f36c898f8ced140821c6fcbb8a Mon Sep 17 00:00:00 2001 From: Dale Johannesen Date: Mon, 11 May 2009 21:54:13 +0000 Subject: Fix PR4188. TailMerging can't tolerate inexact sucessor info. llvm-svn: 71478 --- .../test/CodeGen/X86/2009-05-11-tailmerge-crash.ll | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 llvm/test/CodeGen/X86/2009-05-11-tailmerge-crash.ll (limited to 'llvm/test/CodeGen') diff --git a/llvm/test/CodeGen/X86/2009-05-11-tailmerge-crash.ll b/llvm/test/CodeGen/X86/2009-05-11-tailmerge-crash.ll new file mode 100644 index 00000000000..817872598ea --- /dev/null +++ b/llvm/test/CodeGen/X86/2009-05-11-tailmerge-crash.ll @@ -0,0 +1,23 @@ +; RUN: llvm-as < %s | llc -march=x86 +; PR4188 +; ModuleID = '' +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin9.6" +@g_9 = external global i32 ; [#uses=1] + +define i32 @int86(i32 %p_87) nounwind { +entry: + %0 = trunc i32 %p_87 to i8 ; [#uses=1] + %1 = icmp ne i8 %0, 0 ; [#uses=1] + br label %bb + +bb: ; preds = %bb.i, %bb, %entry + %2 = volatile load i32* @g_9, align 4 ; [#uses=2] + %3 = icmp sgt i32 %2, 1 ; [#uses=1] + %4 = and i1 %3, %1 ; [#uses=1] + br i1 %4, label %bb.i, label %bb + +bb.i: ; preds = %bb + %5 = icmp sgt i32 0, %2 ; [#uses=0] + br label %bb +} -- cgit v1.2.3