[PowerPC] Fix value type on XVCMPEQDP for v2f64 comparisons

XVCMPEQDP is used for VSX v2f64 equality comparisons, but the value type needs
to be v2i64 (as that's the corresponding SETCC type).

Fixes PR24225.

llvm-svn: 245535

2 files changed, 42 insertions, 3 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index bf3072f783e..0b43b046a44 100644
--- a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -2305,14 +2305,15 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) {
     if (Swap)
       std::swap(LHS, RHS);
 
+    EVT ResVT = VecVT.changeVectorElementTypeToInteger();
     if (Negate) {
-      SDValue VCmp(CurDAG->getMachineNode(VCmpInst, dl, VecVT, LHS, RHS), 0);
+      SDValue VCmp(CurDAG->getMachineNode(VCmpInst, dl, ResVT, LHS, RHS), 0);
       return CurDAG->SelectNodeTo(N, PPCSubTarget->hasVSX() ? PPC::XXLNOR :
                                                               PPC::VNOR,
-                                  VecVT, VCmp, VCmp);
+                                  ResVT, VCmp, VCmp);
     }
 
-    return CurDAG->SelectNodeTo(N, VCmpInst, VecVT, LHS, RHS);
+    return CurDAG->SelectNodeTo(N, VCmpInst, ResVT, LHS, RHS);
   }
 
   if (PPCSubTarget->useCRBits())
diff --git a/llvm/test/CodeGen/PowerPC/xvcmpeqdp-v2f64.ll b/llvm/test/CodeGen/PowerPC/xvcmpeqdp-v2f64.ll
new file mode 100644
index 00000000000..ef63233e746
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/xvcmpeqdp-v2f64.ll
@@ -0,0 +1,38 @@
+; RUN: llc < %s | FileCheck %s
+target datalayout = "e-m:e-i64:64-n32:64"
+target triple = "powerpc64le-unknown-linux-gnu"
+
+; Function Attrs: nounwind
+define void @__fmax_double3_3D_exec() #0 {
+entry:
+  br i1 undef, label %if.then.i, label %fmax_double3.exit
+
+if.then.i:                                        ; preds = %entry
+  %cmp24.i.i = fcmp ord <3 x double> undef, zeroinitializer
+  %sext25.i.i = sext <3 x i1> %cmp24.i.i to <3 x i64>
+  %neg.i.i = xor <3 x i64> %sext25.i.i, <i64 -1, i64 -1, i64 -1>
+  %or.i.i = or <3 x i64> undef, %neg.i.i
+  %neg.i.i.i = select <3 x i1> undef, <3 x i64> zeroinitializer, <3 x i64> %sext25.i.i
+  %and.i.i.i = and <3 x i64> undef, %neg.i.i.i
+  %and26.i.i.i = and <3 x i64> undef, %or.i.i
+  %or.i.i.i = or <3 x i64> %and.i.i.i, %and26.i.i.i
+  %astype32.i.i.i = bitcast <3 x i64> %or.i.i.i to <3 x double>
+  %extractVec33.i.i.i = shufflevector <3 x double> %astype32.i.i.i, <3 x double> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
+  store <4 x double> %extractVec33.i.i.i, <4 x double>* undef, align 32
+  br label %fmax_double3.exit
+
+; CHECK-LABEL: @__fmax_double3_3D_exec
+; CHECK: xvcmpeqdp
+
+fmax_double3.exit:                                ; preds = %if.then.i, %entry
+  br i1 undef, label %if.then, label %do.end
+
+if.then:                                          ; preds = %fmax_double3.exit
+  unreachable
+
+do.end:                                           ; preds = %fmax_double3.exit
+  ret void
+}
+
+attributes #0 = { nounwind }
+