If all sources of a PHI node are defined by an implicit_def, just emit an implicit_de...

[oota-llvm.git] / test / CodeGen / X86 / 2008-05-09-PHIElimBug.ll

diff --git a/test/CodeGen/X86/2008-05-09-PHIElimBug.ll b/test/CodeGen/X86/2008-05-09-PHIElimBug.ll
new file mode 100644 (file)
index 0000000..c0b1961
--- /dev/null
+++ b/test/CodeGen/X86/2008-05-09-PHIElimBug.ll
@@ -0,0 +1,25 @@
+; RUN: llvm-as < %s | llc -march=x86
+
+       %struct.V = type { <4 x float>, <4 x float>, <4 x float>, <4 x float>, <4 x float>, <4 x float>, <4 x float>, <4 x i32>, float*, float*, float*, float*, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, i32, i32, i32, i32, i32, i32, i32, i32 }
+
+define fastcc void @t() nounwind  {
+entry:
+       br i1 false, label %bb23816.preheader, label %bb23821
+
+bb23816.preheader:             ; preds = %entry
+       %tmp23735 = and i32 0, 2                ; <i32> [#uses=0]
+       br label %bb23830
+
+bb23821:               ; preds = %entry
+       br i1 false, label %bb23830, label %bb23827
+
+bb23827:               ; preds = %bb23821
+       %tmp23829 = getelementptr %struct.V* null, i32 0, i32 42                ; <i32*> [#uses=0]
+       br label %bb23830
+
+bb23830:               ; preds = %bb23827, %bb23821, %bb23816.preheader
+       %scaledInDst.2.reg2mem.5 = phi i8 [ undef, %bb23827 ], [ undef, %bb23821 ], [ undef, %bb23816.preheader ]               ; <i8> [#uses=1]
+       %toBool35047 = icmp eq i8 %scaledInDst.2.reg2mem.5, 0           ; <i1> [#uses=1]
+       %bothcond39107 = or i1 %toBool35047, false              ; <i1> [#uses=0]
+       unreachable
+}