Do not introduce vector operations in functions marked with noimplicitfloat.

<rdar://problem/12879313>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170630 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 2 deletions

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 9e02c7be71..c852c061d0 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -25,6 +25,7 @@
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/DataLayout.h"
 #include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
 #include "llvm/LLVMContext.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
@@ -7748,8 +7749,10 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode* St) {
         LastLegalVectorType = i + 1;
     }
 
-    // We only use vectors if the constant is known to be zero.
-    if (NonZero)
+    // We only use vectors if the constant is known to be zero and the
+    // function is not marked with the noimplicitfloat attribute.
+    if (NonZero || (DAG.getMachineFunction().getFunction()->getFnAttributes().
+                    hasAttribute(Attribute::NoImplicitFloat)))
       LastLegalVectorType = 0;
 
     // Check if we found a legal integer type to store.