1 files changed, 29 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2009-07-20-DAGCombineBug.ll b/test/CodeGen/X86/2009-07-20-DAGCombineBug.ll
new file mode 100644
index 0000000..e83b3a7
--- /dev/null
+++ b/test/CodeGen/X86/2009-07-20-DAGCombineBug.ll
@@ -0,0 +1,29 @@
+; RUN: llc < %s -march=x86
+
+@bsBuff = internal global i32 0		; <i32*> [#uses=1]
+@llvm.used = appending global [1 x i8*] [i8* bitcast (i32 ()* @bsGetUInt32 to i8*)], section "llvm.metadata"		; <[1 x i8*]*> [#uses=0]
+
+define fastcc i32 @bsGetUInt32() nounwind ssp {
+entry:
+	%bsBuff.promoted44 = load i32* @bsBuff		; <i32> [#uses=1]
+	%0 = add i32 0, -8		; <i32> [#uses=1]
+	%1 = lshr i32 %bsBuff.promoted44, %0		; <i32> [#uses=1]
+	%2 = shl i32 %1, 8		; <i32> [#uses=1]
+	br label %bb3.i17
+
+bb3.i9:		; preds = %bb3.i17
+	br i1 false, label %bb2.i16, label %bb1.i15
+
+bb1.i15:		; preds = %bb3.i9
+	unreachable
+
+bb2.i16:		; preds = %bb3.i9
+	br label %bb3.i17
+
+bb3.i17:		; preds = %bb2.i16, %entry
+	br i1 false, label %bb3.i9, label %bsR.exit18
+
+bsR.exit18:		; preds = %bb3.i17
+	%3 = or i32 0, %2		; <i32> [#uses=0]
+	ret i32 0
+}