One more coalescer fix wrt deadness propagation.

llvm-svn: 48837

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/PowerPC/2008-03-26-CoalescerBug.ll b/llvm/test/CodeGen/PowerPC/2008-03-26-CoalescerBug.ll
new file mode 100644
index 00000000000..0b748d20b7c
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/2008-03-26-CoalescerBug.ll
@@ -0,0 +1,28 @@
+; RUN: llvm-as < %s | llc -mtriple=powerpc-apple-darwin
+
+define i32 @t(i64 %byteStart, i32 %activeIndex) nounwind  {
+entry:
+	%tmp50 = load i32* null, align 4		; <i32> [#uses=1]
+	%tmp5051 = zext i32 %tmp50 to i64		; <i64> [#uses=3]
+	%tmp53 = udiv i64 %byteStart, %tmp5051		; <i64> [#uses=1]
+	%tmp5354 = trunc i64 %tmp53 to i32		; <i32> [#uses=1]
+	%tmp62 = urem i64 %byteStart, %tmp5051		; <i64> [#uses=1]
+	%tmp94 = add i32 0, 1		; <i32> [#uses=1]
+	%tmp100 = urem i32 %tmp94, 0		; <i32> [#uses=2]
+	%tmp108 = add i32 0, %activeIndex		; <i32> [#uses=1]
+	%tmp110 = sub i32 %tmp108, 0		; <i32> [#uses=1]
+	%tmp112 = urem i32 %tmp110, 0		; <i32> [#uses=2]
+	%tmp122 = icmp ult i32 %tmp112, %tmp100		; <i1> [#uses=1]
+	%iftmp.175.0 = select i1 %tmp122, i32 %tmp112, i32 %tmp100		; <i32> [#uses=1]
+	%tmp119 = add i32 %tmp5354, 0		; <i32> [#uses=1]
+	%tmp131 = add i32 %tmp119, %iftmp.175.0		; <i32> [#uses=1]
+	%tmp131132 = zext i32 %tmp131 to i64		; <i64> [#uses=1]
+	%tmp147 = mul i64 %tmp131132, %tmp5051		; <i64> [#uses=1]
+	br i1 false, label %bb164, label %bb190
+bb164:		; preds = %entry
+	%tmp171172 = and i64 %tmp62, 4294967295		; <i64> [#uses=1]
+	%tmp173 = add i64 %tmp171172, %tmp147		; <i64> [#uses=0]
+	ret i32 0
+bb190:		; preds = %entry
+	ret i32 0
+}