[PATCH] D18996: [PPC] Enable shuffling of VSX vectors

[Guozhi Wei via llvm-commits]

Carrot updated this revision to Diff 55109.
Carrot marked an inline comment as done.

http://reviews.llvm.org/D18996

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  test/CodeGen/PowerPC/pr27078.ll

Index: test/CodeGen/PowerPC/pr27078.ll
===================================================================
--- test/CodeGen/PowerPC/pr27078.ll
+++ test/CodeGen/PowerPC/pr27078.ll
@@ -0,0 +1,15 @@
+; RUN: llc -mtriple=powerpc64-linux-gnu -mcpu=pwr8 -mattr=+vsx < %s | FileCheck %s
+
+define <4 x float> @bar(float* %p, float* %q) {
+  %1 = bitcast float* %p to <12 x float>*
+  %2 = bitcast float* %q to <12 x float>*
+  %3 = load <12 x float>, <12 x float>* %1, align 16
+  %4 = load <12 x float>, <12 x float>* %2, align 16
+  %5 = fsub <12 x float> %4, %3
+  %6 = shufflevector <12 x float> %5, <12 x float> undef, <4 x i32> <i32 0, i32 3, i32 6, i32 9>
+  ret <4 x float>  %6
+
+; CHECK: vspltw
+; CHECK: vmrghw
+; CHECK: vsldoi
+}
Index: lib/Target/PowerPC/PPCISelLowering.cpp
===================================================================
--- lib/Target/PowerPC/PPCISelLowering.cpp
+++ lib/Target/PowerPC/PPCISelLowering.cpp
@@ -11920,10 +11920,8 @@
   if (VT == MVT::v2i64)
     return Subtarget.hasDirectMove(); // Don't need stack ops with direct moves
 
-  if (Subtarget.hasQPX()) {
-    if (VT == MVT::v4f32 || VT == MVT::v4f64 || VT == MVT::v4i1)
-      return true;
-  }
+  if (Subtarget.hasVSX() || Subtarget.hasQPX())
+    return true;
 
   return TargetLowering::shouldExpandBuildVectorWithShuffles(VT, DefinedValues);
 }


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