DAGCombiner: Avoid generating illegal vector INT_TO_FP nodes

DAGCombiner::reduceBuildVecConvertToConvertBuildVec() was making two
mistakes:

1. It was checking the legality of scalar INT_TO_FP nodes and then generating
vector nodes.

2. It was passing the result value type to
TargetLoweringInfo::getOperationAction() when it should have been
passing the value type of the first operand.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171420 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 33 insertions, 0 deletions

diff --git a/test/CodeGen/R600/dagcombiner-bug-illegal-vec4-int-to-fp.ll b/test/CodeGen/R600/dagcombiner-bug-illegal-vec4-int-to-fp.ll
new file mode 100644
index 0000000000..1acf905955
--- /dev/null
+++ b/test/CodeGen/R600/dagcombiner-bug-illegal-vec4-int-to-fp.ll
@@ -0,0 +1,33 @@
+;RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
+
+;CHECK: INT_TO_FLT T{{[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}
+
+; This test is for a bug in
+; DAGCombiner::reduceBuildVecConvertToConvertBuildVec() where
+; the wrong type was being passed to
+; TargetLowering::getOperationAction() when checking the legality of
+; ISD::UINT_TO_FP and ISD::SINT_TO_FP opcodes.
+
+define void @sint(<4 x float> addrspace(1)* %out, i32 addrspace(1)* %in) {
+entry:
+  %ptr = getelementptr i32 addrspace(1)* %in, i32 1
+  %sint = load i32 addrspace(1) * %in
+  %conv = sitofp i32 %sint to float
+  %0 = insertelement <4 x float> undef, float %conv, i32 0
+  %splat = shufflevector <4 x float> %0, <4 x float> undef, <4 x i32> zeroinitializer
+  store <4 x float> %splat, <4 x float> addrspace(1)* %out
+  ret void
+}
+
+;CHECK: UINT_TO_FLT T{{[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}
+
+define void @uint(<4 x float> addrspace(1)* %out, i32 addrspace(1)* %in) {
+entry:
+  %ptr = getelementptr i32 addrspace(1)* %in, i32 1
+  %uint = load i32 addrspace(1) * %in
+  %conv = uitofp i32 %uint to float
+  %0 = insertelement <4 x float> undef, float %conv, i32 0
+  %splat = shufflevector <4 x float> %0, <4 x float> undef, <4 x i32> zeroinitializer
+  store <4 x float> %splat, <4 x float> addrspace(1)* %out
+  ret void
+}