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LLVM backend for 6502
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0f32a037ef
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Ahmed Bougacha 0f32a037ef [MemCpyOpt] Use the raw i8* dest when optimizing memset+memcpy. 
MemIntrinsic::getDest() looks through pointer casts, and using it
directly when building the new GEP+memset results in stuff like:

  %0 = getelementptr i64* %p, i32 16
  %1 = bitcast i64* %0 to i8*
  call ..memset(i8* %1, ...)

instead of the correct:

  %0 = bitcast i64* %p to i8*
  %1 = getelementptr i8* %0, i32 16
  call ..memset(i8* %1, ...)

Instead, use getRawDest, which just gives you the i8* value.
While there, use the memcpy's dest, as it's live anyway.

In most cases, when the optimization triggers, the memset and memcpy
sizes are the same, so the built memset is 0-sized and eliminated.
The problem occurs when they're different.

Fixes a regression caused by r235232: PR23300.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235419 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-21 21:28:33 +00:00
autoconf Try to unbreak Clang build to export LLVM_ABI_BREAKING_CHECKS, fixup for r233310. 2015-04-01 11:46:15 +00:00
bindings DebugInfo: Remove DIArray and DITypeArray typedefs 2015-04-21 20:07:38 +00:00
cmake Add targets to cmake for specific target components. 2015-04-20 18:22:05 +00:00
docs Minor edits to the llvm-cov documentation. 2015-04-21 16:32:02 +00:00
examples DebugInfo: Fix Kaleidoscope Ch. 8 after r235327 2015-04-20 21:29:44 +00:00
include Update comment. NFC. 2015-04-21 21:15:35 +00:00
lib [MemCpyOpt] Use the raw i8* dest when optimizing memset+memcpy. 2015-04-21 21:28:33 +00:00
projects Reverse the order libc++ and libc++abi are added in CMake. 2015-03-04 01:16:43 +00:00
test [MemCpyOpt] Use the raw i8* dest when optimizing memset+memcpy. 2015-04-21 21:28:33 +00:00
tools DebugInfo: Drop rest of DIDescriptor subclasses 2015-04-21 18:44:06 +00:00
unittests DebugInfo: Remove DIArray and DITypeArray typedefs 2015-04-21 20:07:38 +00:00
utils AVX-512: Added VPMOVx2M instructions for SKX, 2015-04-21 14:38:31 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore Ignore compile_commands.json only at the root of the tree. 2015-03-26 18:55:42 +00:00
CMakeLists.txt [CMake] Updates to llvm-shlib to support overriding exports list and added an option to export all symbols. 2015-04-13 21:29:46 +00:00
CODE_OWNERS.TXT Add myself as the Constant Folder owner. 2015-04-20 23:19:10 +00:00
configure Try to unbreak Clang build to export LLVM_ABI_BREAKING_CHECKS, fixup for r233310. 2015-04-01 11:46:15 +00:00
CREDITS.TXT
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Try to unbreak Clang build to export LLVM_ABI_BREAKING_CHECKS, fixup for r233310. 2015-04-01 11:46:15 +00:00
Makefile.rules
README.txt Revert test commit at revision 233535. 2015-03-30 12:39:03 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
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Please see the documentation provided in docs/ for further
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If you're writing a package for LLVM, see docs/Packaging.rst for our
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