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Pete Cooper bedb6f3c4b Check for dynamic alloca's when selecting lifetime intrinsics. 
TL;DR: Indexing maps with [] creates missing entries.

The long version:

When selecting lifetime intrinsics, we index the *static* alloca map with the AllocaInst we find for that lifetime.  Trouble is, we don't first check to see if this is a dynamic alloca.

On the attached example, this causes a dynamic alloca to create an entry in the static map, and returns 0 (the default) as the frame index for that lifetime.  0 was used for the frame index of the stack protector, which given that it now has a lifetime, is coloured, and merged with other stack slots.

PEI would later trigger an assert because it expects the stack protector to not be dead.

This fix ensures that we only get frame indices for static allocas, ie, those in the map.  Dynamic ones are effectively dropped, which is suboptimal, but at least isn't completely broken.

rdar://problem/18672951

llvm-svn: 220099
2014-10-17 22:59:33 +00:00
autoconf Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
bindings Fix bashism in build.sh. 2014-10-17 02:20:40 +00:00
cmake Disable ccache for go tests. 2014-10-17 18:32:36 +00:00
docs [llvm-symbolizer] Introduce the -dsym-hint option. 2014-10-17 00:50:19 +00:00
examples Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
include [Stackmaps] Enable invoking the patchpoint intrinsic. 2014-10-17 17:39:00 +00:00
lib Check for dynamic alloca's when selecting lifetime intrinsics. 2014-10-17 22:59:33 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test Check for dynamic alloca's when selecting lifetime intrinsics. 2014-10-17 22:59:33 +00:00
tools Add a test that would have found the bug in r219829. 2014-10-17 01:34:23 +00:00
unittests [ADT] Add an (ADL-friendly) abs free function for APFloat that returns 2014-10-10 08:27:22 +00:00
utils Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy Add .clang-tidy configuration file to provide LLVM-optimized defaults for 2014-09-08 13:30:00 +00:00
.gitignore Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt Add LLVM_ENABLE_MODULES flag to CMake to enable building with C++ modules. 2014-09-26 22:40:15 +00:00
CODE_OWNERS.TXT Add Tom Stellard's role as 3.5 release manager. 2014-09-12 08:07:31 +00:00
configure Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
Makefile.rules Revert my earlier change to add "all" as a dependency to check. In 2014-09-19 18:44:27 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.