Make this kind of lowering to be supported by 256-bit instructions:
shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
To:
shuffle (vload ptr)), undef, <1, 1, 1, 1>
Fix PR10494
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136691 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/avx-256-splat.ll b/test/CodeGen/X86/avx-256-splat.ll
index edc17b7..36d4694 100644
--- a/test/CodeGen/X86/avx-256-splat.ll
+++ b/test/CodeGen/X86/avx-256-splat.ll
@@ -45,3 +45,35 @@
%vecinit6.i = insertelement <4 x double> %vecinit4.i, double %q, i32 3
ret <4 x double> %vecinit6.i
}
+
+; Test this simple opt:
+; shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
+; To:
+; shuffle (vload ptr)), undef, <1, 1, 1, 1>
+; CHECK: vmovaps
+; CHECK-NEXT: vpextrd
+define void @funcE() nounwind {
+allocas:
+ %udx495 = alloca [18 x [18 x float]], align 32
+ br label %for_test505.preheader
+
+for_test505.preheader: ; preds = %for_test505.preheader, %allocas
+ br i1 undef, label %for_exit499, label %for_test505.preheader
+
+for_exit499: ; preds = %for_test505.preheader
+ br i1 undef, label %__load_and_broadcast_32.exit1249, label %load.i1247
+
+load.i1247: ; preds = %for_exit499
+ %ptr1227 = getelementptr [18 x [18 x float]]* %udx495, i64 0, i64 1, i64 1
+ %ptr.i1237 = bitcast float* %ptr1227 to i32*
+ %val.i1238 = load i32* %ptr.i1237, align 4
+ %ret6.i1245 = insertelement <8 x i32> undef, i32 %val.i1238, i32 6
+ %ret7.i1246 = insertelement <8 x i32> %ret6.i1245, i32 %val.i1238, i32 7
+ %phitmp = bitcast <8 x i32> %ret7.i1246 to <8 x float>
+ br label %__load_and_broadcast_32.exit1249
+
+__load_and_broadcast_32.exit1249: ; preds = %load.i1247, %for_exit499
+ %load_broadcast12281250 = phi <8 x float> [ %phitmp, %load.i1247 ], [ undef, %for_exit499 ]
+ ret void
+}
+