[InferAddressSpaces] Update uses of IRBuilder memory intrinsic creation to new API

Summary:
This change is part of step five in the series of changes to remove alignment argument from
memcpy/memmove/memset in favour of alignment attributes. In particular, this changes the
InferAddressSpaces pass to cease using:
1) The old getAlignment() API of MemoryIntrinsic in favour of getting source & dest specific
alignments through the new API.
2) The old IRBuilder CreateMemCpy/CreateMemMove single-alignment APIs in favour of the new
API that allows setting source and destination alignments independently.

Steps:
Step 1) Remove alignment parameter and create alignment parameter attributes for
memcpy/memmove/memset. ( rL322965, rC322964, rL322963 )
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
source and dest alignments. ( rL323597 )
Step 3) Update Clang to use the new IRBuilder API. ( rC323617 )
Step 4) Update Polly to use the new IRBuilder API. ( rL323618 )
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
and those that use use MemIntrinsicInst::[get|set]Alignment() to use [get|set]DestAlignment()
and [get|set]SourceAlignment() instead. ( rL323886, rL323891, rL324148, rL324273, rL324278,
rL324384 )
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
MemIntrinsicInst::[get|set]Alignment() methods.

Reference
   http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
   http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html

llvm-svn: 324395

1 files changed, 7 insertions, 5 deletions

diff --git a/llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp b/llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp
index c87077e0dc2..38993ecccea 100644
--- a/llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp
+++ b/llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp
@@ -785,7 +785,7 @@ static bool handleMemIntrinsicPtrUse(MemIntrinsic *MI, Value *OldV,
 
   if (auto *MSI = dyn_cast<MemSetInst>(MI)) {
     B.CreateMemSet(NewV, MSI->getValue(),
-                   MSI->getLength(), MSI->getAlignment(),
+                   MSI->getLength(), MSI->getDestAlignment(),
                    false, // isVolatile
                    TBAA, ScopeMD, NoAliasMD);
   } else if (auto *MTI = dyn_cast<MemTransferInst>(MI)) {
@@ -801,14 +801,16 @@ static bool handleMemIntrinsicPtrUse(MemIntrinsic *MI, Value *OldV,
 
     if (isa<MemCpyInst>(MTI)) {
       MDNode *TBAAStruct = MTI->getMetadata(LLVMContext::MD_tbaa_struct);
-      B.CreateMemCpy(Dest, Src, MTI->getLength(),
-                     MTI->getAlignment(),
+      B.CreateMemCpy(Dest, MTI->getDestAlignment(),
+                     Src, MTI->getSourceAlignment(),
+                     MTI->getLength(),
                      false, // isVolatile
                      TBAA, TBAAStruct, ScopeMD, NoAliasMD);
     } else {
       assert(isa<MemMoveInst>(MTI));
-      B.CreateMemMove(Dest, Src, MTI->getLength(),
-                      MTI->getAlignment(),
+      B.CreateMemMove(Dest, MTI->getDestAlignment(),
+                      Src, MTI->getSourceAlignment(),
+                      MTI->getLength(),
                       false, // isVolatile
                       TBAA, ScopeMD, NoAliasMD);
     }