PowerPC: Expand VSELECT nodes.

There's probably a better expansion for those nodes than the default for
altivec, but this is better than crashing. VSELECTs occur in loop vectorizer
output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170551 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 2569710..9cc4e96 100644 (file)
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -376,6 +376,7 @@ PPCTargetLowering::PPCTargetLowering(PPCTargetMachine &TM)
       setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
       setOperationAction(ISD::CTTZ, VT, Expand);
       setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
+      setOperationAction(ISD::VSELECT, VT, Expand);
       setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
 
       for (unsigned j = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;

diff --git a/test/CodeGen/PowerPC/vec_select.ll b/test/CodeGen/PowerPC/vec_select.ll
new file mode 100644 (file)
index 0000000..4ad0acc
--- /dev/null
+++ b/test/CodeGen/PowerPC/vec_select.ll
@@ -0,0 +1,7 @@
+; RUN: llc < %s -mtriple=powerpc64-linux-gnu -mattr=+altivec | FileCheck %s
+
+; CHECK: vsel_float
+define <4 x float> @vsel_float(<4 x float> %v1, <4 x float> %v2) {
+  %vsel = select <4 x i1> <i1 true, i1 false, i1 false, i1 false>, <4 x float> %v1, <4 x float> %v2
+  ret <4 x float> %vsel
+}