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83f743a4d5
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Quentin Colombet 83f743a4d5 [DAGCombiner] Reapply load slicing (192471) with a test that explicitly set sse4.2 support. 
This should fix the buildbots.

Original commit message:
[DAGCombiner] Slice a big load in two loads when the element are next to each
other in memory and the target has paired load and performs post-isel loads
combining.

E.g., this optimization will transform something like this:
a = load i64* addr
b = trunc i64 a to i32
c = lshr i64 a, 32
d = trunc i64 c to i32

into:
b = load i32* addr1
d = load i32* addr2
Where addr1 = addr2 +/- sizeof(i32), if the target supports paired load and
performs post-isel loads combining.

One should overload TargetLowering::hasPairedLoad to provide this information.
The default is false.

<rdar://problem/14477220>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192476 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-11 18:29:42 +00:00
autoconf Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
bindings
cmake cmake: don't set LLVM_COMPILER_IS_GCC_COMPATIBLE when using clang-cl 2013-10-07 22:03:23 +00:00
docs Add missing releases. 2013-10-09 17:37:04 +00:00
examples
include [DAGCombiner] Reapply load slicing (192471) with a test that explicitly set sse4.2 support. 2013-10-11 18:29:42 +00:00
lib [DAGCombiner] Reapply load slicing (192471) with a test that explicitly set sse4.2 support. 2013-10-11 18:29:42 +00:00
projects Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
test [DAGCombiner] Reapply load slicing (192471) with a test that explicitly set sse4.2 support. 2013-10-11 18:29:42 +00:00
tools Debug Info: In DIBuilder, the context field of subprogram is updated to use 2013-10-10 18:40:01 +00:00
unittests Silencing an MSVC warning. 2013-10-05 19:41:41 +00:00
utils Fix handling of CHECK-DAG inside of CHECK-LABEL. 2013-10-11 16:48:02 +00:00
.arcconfig
.clang-format
.gitignore
CMakeLists.txt
CODE_OWNERS.TXT
configure Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +00:00

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