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LLVM backend for 6502
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b3f0673d52
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Chris Lattner b3f0673d52 Teach valuetracking that byval arguments with a specified alignment are 
aligned.

Teach memcpyopt to not give up all hope when confonted with an underaligned
memcpy feeding an overaligned byval.  If the *source* of the memcpy can be
determined to be adequeately aligned, or if it can be forced to be, we can
eliminate the memcpy.

This addresses PR9794.  We now compile the example into:

define i32 @f(%struct.p* nocapture byval align 8 %q) nounwind ssp {
entry:
  %call = call i32 @g(%struct.p* byval align 8 %q) nounwind
  ret i32 %call
}

in both x86-64 and x86-32 mode.  We still don't get a tailcall though,
because tailcalls apparently can't handle byval.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131884 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-23 00:03:39 +00:00
autoconf Re-add the autoconf rule for the docs/doxygen.cfg file. 2011-05-13 03:27:56 +00:00
bindings Fix compiling the ocaml kaleidoscope tutorials 2011-02-09 18:32:02 +00:00
cmake Another try at fixing cmake. 2011-05-19 00:13:04 +00:00
docs document thiscall, PR9101 2011-05-22 22:28:47 +00:00
examples Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
include add a helper method to get the byval alignment of an argument. 2011-05-22 23:57:23 +00:00
lib Teach valuetracking that byval arguments with a specified alignment are 2011-05-23 00:03:39 +00:00
projects Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
runtime The computation of string length is not that complicated. Fix it, again. :) 2011-05-05 23:52:18 +00:00
test Teach valuetracking that byval arguments with a specified alignment are 2011-05-23 00:03:39 +00:00
tools initialize and finalize function passes, pointed out by Cameron. 2011-05-22 06:44:19 +00:00
unittests Add CreateLifetimeStart and CreateLifetimeEnd to the IRBuilder, with plans to 2011-05-21 23:14:36 +00:00
utils Fix PR9947 by placing OPFL_MemRefs on the node using memory operands rather than 2011-05-19 21:13:30 +00:00
website
.gitignore Cleanup and document .gitignore. 2010-12-17 17:22:50 +00:00
build-for-llvm-top.sh
CMakeLists.txt Rename profile_rt.so to libprofile_rt.so under configure+make (it already was 2011-04-29 02:12:06 +00:00
configure Re-add the autoconf rule for the docs/doxygen.cfg file. 2011-05-13 03:27:56 +00:00
CREDITS.TXT Another git svn dcommit test. This time let's hope it doesn't kill my repo. 2010-12-10 14:45:10 +00:00
LICENSE.TXT 2010 is upon us. 2010-01-09 18:40:31 +00:00
llvm.spec.in
Makefile build: Add support for a SHOW_DIAGNOSTICS build variable. 2011-04-11 22:37:39 +00:00
Makefile.common
Makefile.config.in autoconf: Add --disable-embed-stdcxx to suppress linking libstdc++.a into llvm.dll with --enable-shared on Cygming. 2010-12-29 03:59:14 +00:00
Makefile.rules Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
ModuleInfo.txt Remove trailing space. This is just an excuse to poke the 2010-10-05 20:32:15 +00:00
README.txt reverting test commit 2011-05-12 17:38:08 +00:00

README.txt 

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

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