Jin-Gu Kang 198e97c423 Add comment as following: ... load and store reference same memory location, the memory location is represented by getelementptr with two uses (load and store) and the getelementptr's base is alloca with single use. At this point, instructions from alloca to store can be removed. (this pattern is generated when bitfield is accessed.) For example, %u = alloca %struct.test, align 4 ; [#uses=1] %0 = getelementptr inbounds %struct.test* %u, i32 0, i32 0;[#uses=2] %1 = load i8* %0, align 4 ; [#uses=1] %2 = and i8 %1, -16 ; [#uses=1] %3 = or i8 %2, 5 ; [#uses=1] store i8 %3, i8* %0, align 4 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127565 91177308-0d34-0410-b5e6-96231b3b80d8		2011-03-13 14:05:51 +00:00
..
Analysis	Teach ComputeMaskedBits about sub nsw.	2011-03-12 17:18:11 +00:00
Archive	Revert PathV2 changes, as sys::fs::unique_file is not finished yet.	2011-03-01 19:50:55 +00:00
AsmParser	Use X86_thiscall calling convention for Win64 as well.	2011-03-03 07:49:07 +00:00
Bitcode	Move library stuff out of the toplevel CMakeLists.txt file.	2011-02-18 22:06:14 +00:00
CodeGen	Now that we are deleting unused live intervals during allocation, pointers may be reused.	2011-03-13 01:29:32 +00:00
CompilerDriver	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
ExecutionEngine
Linker	Correctly merge available_externally and regular definitions when they have	2011-02-01 05:33:52 +00:00
MC	Fixed the comparison operator for the enhanced	2011-03-12 03:27:54 +00:00
Object
Support	Don't compute the file size if we don't need to.	2011-03-10 20:54:07 +00:00
Target	Sometimes isPredicable lies to us and tells us we don't need the operands.	2011-03-12 01:09:29 +00:00
Transforms	Add comment as following:	2011-03-13 14:05:51 +00:00
VMCore	Unbreak the CMake build.	2011-03-10 00:51:01 +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