Avoid using f64 to lower memcpy from constant string. It's cheaper to use i32 store of immediates.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100751 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 9cd01be..992cc5a 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -5547,11 +5547,14 @@
/// probably because the source does not need to be loaded. If
/// 'NonScalarIntSafe' is true, that means it's safe to return a
/// non-scalar-integer type, e.g. empty string source, constant, or loaded
-/// from memory. It returns EVT::Other if SelectionDAG should be responsible
-/// for determining it.
+/// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
+/// constant so it does not need to be loaded.
+/// It returns EVT::Other if SelectionDAG should be responsible for
+/// determining the type.
EVT PPCTargetLowering::getOptimalMemOpType(uint64_t Size,
unsigned DstAlign, unsigned SrcAlign,
bool NonScalarIntSafe,
+ bool MemcpyStrSrc,
SelectionDAG &DAG) const {
if (this->PPCSubTarget.isPPC64()) {
return MVT::i64;
diff --git a/lib/Target/PowerPC/PPCISelLowering.h b/lib/Target/PowerPC/PPCISelLowering.h
index f816bdd..f7d629b 100644
--- a/lib/Target/PowerPC/PPCISelLowering.h
+++ b/lib/Target/PowerPC/PPCISelLowering.h
@@ -355,12 +355,14 @@
/// probably because the source does not need to be loaded. If
/// 'NonScalarIntSafe' is true, that means it's safe to return a
/// non-scalar-integer type, e.g. empty string source, constant, or loaded
- /// from memory. It returns EVT::Other if SelectionDAG should be responsible
- /// for determining it.
+ /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
+ /// constant so it does not need to be loaded.
+ /// It returns EVT::Other if SelectionDAG should be responsible for
+ /// determining the type.
virtual EVT
- getOptimalMemOpType(uint64_t Size,
- unsigned DstAlign, unsigned SrcAlign,
- bool NonScalarIntSafe, SelectionDAG &DAG) const;
+ getOptimalMemOpType(uint64_t Size, unsigned DstAlign, unsigned SrcAlign,
+ bool NonScalarIntSafe, bool MemcpyStrSrc,
+ SelectionDAG &DAG) const;
/// getFunctionAlignment - Return the Log2 alignment of this function.
virtual unsigned getFunctionAlignment(const Function *F) const;