Change memcpy/memove/memset to have dest and source alignment attributes.

Summary:
  This change is step three in the series of changes to remove alignment argument from
memcpy/memmove/memset in favour of alignment attributes. 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.
Step 4) Update Polly to use the new IRBuilder API.
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 getDestAlignment()
and getSourceAlignment() instead.
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

Reviewers: rjmccall

Subscribers: jyknight, nemanjai, nhaehnle, javed.absar, sbc100, aheejin, kbarton, fedor.sergeev, cfe-commits

Differential Revision: https://reviews.llvm.org/D41677

llvm-svn: 323617

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/test/CodeGenCXX/copy-constructor-elim.cpp b/clang/test/CodeGenCXX/copy-constructor-elim.cpp
index fa76fb61ef2..7ba231071e7 100644
--- a/clang/test/CodeGenCXX/copy-constructor-elim.cpp
+++ b/clang/test/CodeGenCXX/copy-constructor-elim.cpp
@@ -56,4 +56,4 @@ extern "C" V f() { return gv1; }
 // Make sure that we obey the destination's alignment requirements when emitting
 // the copy.
 // CHECK-LABEL: define {{.*}} @f(
-// CHECK:   call void @llvm.memcpy.p0i8.p0i8.{{i64|i32}}({{.*}}align 4{{.*}}, i8* align 4 bitcast (%struct.V* @gv1 to i8*), {{i64|i32}} 4, i1 false)
+// CHECK:   call void @llvm.memcpy.p0i8.p0i8.{{i64|i32}}({{.*}}align 4{{.*}}, i8* align 8 bitcast (%struct.V* @gv1 to i8*), {{i64|i32}} 4, i1 false)