Evan Cheng 7e20a574eb Add a late optimization to BranchFolding that hoist common instruction sequences ... at the start of basic blocks to their common predecessor. It's actually quite common (e.g. about 50 times in JM/lencod) and has shown to be a nice code size benefit. e.g. pushq %rax testl %edi, %edi jne LBB0_2 ## BB#1: xorb %al, %al popq %rdx ret LBB0_2: xorb %al, %al callq _foo popq %rdx ret => pushq %rax xorb %al, %al testl %edi, %edi je LBB0_2 ## BB#1: callq _foo LBB0_2: popq %rdx ret rdar://9145558 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131172 91177308-0d34-0410-b5e6-96231b3b80d8		2011-05-11 01:03:01 +00:00
..
Analysis	Change a few std::maps to DenseMaps.	2011-05-09 18:44:09 +00:00
Archive	Revert PathV2 changes, as sys::fs::unique_file is not finished yet.	2011-03-01 19:50:55 +00:00
AsmParser	Remove unused variables caught by GCC's -Wunused-but-set-variable.	2011-05-03 16:00:27 +00:00
Bitcode	It's valid to take the blockaddress of a different function, so remove this	2011-05-06 21:09:44 +00:00
CodeGen	Add a late optimization to BranchFolding that hoist common instruction sequences	2011-05-11 01:03:01 +00:00
CompilerDriver	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
ExecutionEngine	Revert ExecutionEngine patches, they either failed to build or broke unit tests.	2011-05-07 03:12:54 +00:00
Linker	Set the unnamed_addr only when we're creating a new GV in the dest module.	2011-03-29 23:31:06 +00:00
MC	Avoid a gcc warning.	2011-05-10 22:28:35 +00:00
Object	Remove dead variable pointed out by GCC 4.6 warnings, and reflow this a little	2011-05-02 05:05:29 +00:00
Support	In option typo correction, consider -foo=VALUE flags as two distinct parts. The	2011-05-02 05:24:47 +00:00
Target	Optimize atomic lock or that doesn't use the result value.	2011-05-10 23:57:45 +00:00
Transforms	Preserve line number information.	2011-05-10 00:03:11 +00:00
VMCore	Fix cmake again.	2011-05-10 22:42:41 +00:00
CMakeLists.txt	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
Makefile	Add LLVMObject Library.	2010-11-15 03:21:41 +00:00