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Andrew Trick 6a24682579 VirtRegRewriter fix: update kill flags, which are used by the scavenger.
rdar://problem/8893967: JM/lencod miscompile at -arch armv7 -mthumb -O3

Added ResurrectKill to remove kill flags after we decide to reused a
physical register. And (hopefully) ensure that we call it in all the
right places.

Sorry, I'm not checking in a unit test given that it's a miscompile I
can't reproduce easily with a toy example. Failures in the rewriter
depend on a series of heuristic decisions maked during one of the many
upstream phases in codegen. This case would require coercing regalloc
to generate a couple of rematerialzations in a way that causes the
scavenger to reuse the same register at just the wrong point.

The general way to test this is to implement kill flags
verification. Then we could have a simple, robust compile-only unit
test. That would be worth doing if the whole pass was not about to
disappear. At this point we focus verification work on the next
generation of regalloc.

llvm-svn: 124442
2011-01-27 21:26:43 +00:00
autoconf 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
bindings Fix OCaml bindings crash, PR8847. 2010-12-23 15:49:26 +00:00
cmake Don't show -pedantic, -W and -Wall on the output of 2011-01-27 19:29:48 +00:00
docs Handles libffi on the CMake build. 2011-01-21 15:42:54 +00:00
examples Do not re-test for the existence of pthread.h. 2010-12-23 21:27:22 +00:00
include Introduce virtual ParseRegister method in TargetAsmParser. 2011-01-27 17:14:22 +00:00
lib VirtRegRewriter fix: update kill flags, which are used by the scavenger. 2011-01-27 21:26:43 +00:00
projects Regen configure 2010-12-12 21:42:01 +00:00
runtime Rename 'libprofile/exported_symbols.lst' to 'libprofile/libprofile.exports'. 2010-09-03 15:42:45 +00:00
test Add support for specifying register name in cfi-register/offset/def 2011-01-27 17:16:37 +00:00
tools Don't show -pedantic, -W and -Wall on the output of 2011-01-27 19:29:48 +00:00
unittests Don't infinitely recurse! Patch by Marius Wachtler! 2011-01-27 07:35:27 +00:00
utils Clang: separate the access-control diagnostics from other diagnostics that do not have SFINAE behavior. 2011-01-27 21:06:17 +00:00
website
.gitignore Cleanup and document .gitignore. 2010-12-17 17:22:50 +00:00
build-for-llvm-top.sh
CMakeLists.txt Handles libffi on the CMake build. 2011-01-21 15:42:54 +00:00
configure 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
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
llvm.spec.in
Makefile Merge System into Support. 2010-11-29 18:16:10 +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 build: Shared libraries shouldn't used RPATH on Darwin, only main executables 2010-12-08 02:29:26 +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 Undoing test commit blank space. 2010-09-29 17:39:29 +00:00

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