Hans Wennborg b82f8a28e8 Revert "X86 memcpy lowering: use "rep movs" even when esi is used as base pointer" (r204174) ... > For functions where esi is used as base pointer, we would previously fall ba > from lowering memcpy with "rep movs" because that clobbers esi. > > With this patch, we just store esi in another physical register, and restore > it afterwards. This adds a little bit of register preassure, but the more > efficient memcpy should be worth it. > > Differential Revision: http://llvm-reviews.chandlerc.com/D2968 This didn't work. I was ending up with code like this: lea edi,[esi+38h] mov ecx,0Fh mov edx,esi mov esi,ebx rep movs dword ptr es:[edi],dword ptr [esi] lea ecx,[esi+74h] <-- Ooops, we're now using esi before restoring it from edx. add ebx,3Ch mov esi,edx I guess if we want to do this we need stronger glue or something, or doing the expansion much later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204829 91177308-0d34-0410-b5e6-96231b3b80d8		2014-03-26 16:30:54 +00:00
..
Analysis	blockfreq: Implement Pass::releaseMemory()	2014-03-25 18:01:38 +00:00
AsmParser	Remove the linker_private and linker_private_weak linkages.	2014-03-13 23:18:37 +00:00
Bitcode	Support: Make error_category's constructor public	2014-03-15 04:05:59 +00:00
CodeGen	Add @llvm.clear_cache builtin	2014-03-26 12:52:28 +00:00
DebugInfo	DebugInfo: Support debug_loc under fission	2014-03-25 01:44:02 +00:00
ExecutionEngine	AArch64_BE Elf support for MC-JIT runtime dynamic linker	2014-03-26 14:57:32 +00:00
IR	Revert "Prevent alias from pointing to weak aliases."	2014-03-26 06:14:40 +00:00
IRReader	Replace OwningPtr<T> with std::unique_ptr<T>.	2014-03-06 05:51:42 +00:00
LineEditor	[CMake] Use LINK_LIBS instead of target_link_libraries().	2014-02-26 06:41:29 +00:00
Linker	[Layering] Sink Linker.h into a Linker subdirectory to make it	2014-03-06 03:42:23 +00:00
LTO	Remove the linker_private and linker_private_weak linkages.	2014-03-13 23:18:37 +00:00
MC	AArch64_BE Elf support for MC-JIT runtime dynamic linker	2014-03-26 14:57:32 +00:00
Object	[RuntimeDyld] Allow processRelocationRef to process more than one relocation entry at a time.	2014-03-21 07:26:41 +00:00
Option	Avoid buffer copies when a Twine already is a StringRef.	2013-12-03 18:18:28 +00:00
ProfileData	InstrProf: Silence spurious warnings in GCC 4.8	2014-03-24 00:47:18 +00:00
Support	Disable Visual C++ warning 4722 about aborting a destructor,	2014-03-25 08:42:49 +00:00
TableGen	remove a bunch of unused private methods	2014-03-23 17:09:26 +00:00
Target	Revert "X86 memcpy lowering: use "rep movs" even when esi is used as base pointer" (r204174)	2014-03-26 16:30:54 +00:00
Transforms	Revert "Prevent alias from pointing to weak aliases."	2014-03-26 06:14:40 +00:00
CMakeLists.txt	ProfileData: Introduce the InstrProfReader interface and a text reader	2014-03-21 17:24:48 +00:00
LLVMBuild.txt	ProfileData: Introduce the InstrProfReader interface and a text reader	2014-03-21 17:24:48 +00:00
Makefile	ProfileData: Introduce the InstrProfReader interface and a text reader	2014-03-21 17:24:48 +00:00