From 3c88d742d4e89e9b2ed7bd10822d18748b97d488 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 18 Mar 2008 08:26:47 +0000
Subject: Rewrite code that propagate isDead information after a dead copy is
 coalesced. This remove some ugly spaghetti code and fixed a number of subtle
 bugs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48490 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../PowerPC/2008-03-17-RegScavengerCrash.ll        | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 test/CodeGen/PowerPC/2008-03-17-RegScavengerCrash.ll

(limited to 'test')

diff --git a/test/CodeGen/PowerPC/2008-03-17-RegScavengerCrash.ll b/test/CodeGen/PowerPC/2008-03-17-RegScavengerCrash.ll
new file mode 100644
index 0000000..eaeccc5
--- /dev/null
+++ b/test/CodeGen/PowerPC/2008-03-17-RegScavengerCrash.ll
@@ -0,0 +1,31 @@
+; RUN: llvm-as < %s | llc -march=ppc32 -enable-ppc32-regscavenger
+
+	%struct._cpp_strbuf = type { i8*, i32, i32 }
+	%struct.cpp_string = type { i32, i8* }
+
+declare fastcc void @emit_numeric_escape(i32, i32, %struct._cpp_strbuf*, i32) nounwind 
+
+define i32 @cpp_interpret_string(i32 %pfile, %struct.cpp_string* %from, i32 %wide) nounwind  {
+entry:
+	%tmp61 = load i32* null, align 4		; <i32> [#uses=1]
+	%toBool = icmp eq i32 %wide, 0		; <i1> [#uses=2]
+	%iftmp.87.0 = select i1 %toBool, i32 %tmp61, i32 0		; <i32> [#uses=2]
+	%tmp69 = icmp ult i32 %iftmp.87.0, 33		; <i1> [#uses=1]
+	%min = select i1 %tmp69, i32 %iftmp.87.0, i32 32		; <i32> [#uses=1]
+	%tmp71 = icmp ugt i32 %min, 31		; <i1> [#uses=1]
+	br i1 %tmp71, label %bb79, label %bb75
+bb75:		; preds = %entry
+	ret i32 0
+bb79:		; preds = %entry
+	br i1 %toBool, label %bb103, label %bb94
+bb94:		; preds = %bb79
+	br i1 false, label %bb729, label %bb130.preheader
+bb103:		; preds = %bb79
+	ret i32 0
+bb130.preheader:		; preds = %bb94
+	%tmp134 = getelementptr %struct.cpp_string* %from, i32 0, i32 1		; <i8**> [#uses=0]
+	ret i32 0
+bb729:		; preds = %bb94
+	call fastcc void @emit_numeric_escape( i32 %pfile, i32 0, %struct._cpp_strbuf* null, i32 %wide ) nounwind 
+	ret i32 1
+}
-- 
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