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LLVM backend for 6502
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28127ffb51
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Robin Morisset 28127ffb51 [X86] Fix a bug with fetch_add(INT32_MIN) 
Summary:
Fix pr21099

The pseudocode of what we were doing (spread through two functions) was:
if (operand.doesNotFitIn32Bits())
  Opc.initializeWithFoo();
if (operand < 0)
  operand = -operand;
if (operand.doesFitIn8Bits())
  Opc.initializeWithBar();
else if (operand.doesFitIn32Bits())
  Opc.initializeWithBlah();
doStuff(Opc);

So for operand == INT32_MIN, Opc was never initialized because the operand changes
from fitting in 32 bits to not fitting, causing the various bugs/error messages
noted by pr21099.

This patch adds an extra test at the beginning for this case, and an
llvm_unreachable to have better error message if the operand ends up
not fitting in 32-bits at the end.

Test Plan: new test + make check

Reviewers: jfb

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5655

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219257 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-07 23:53:57 +00:00
autoconf Recognize aarch64_be as valid architecture. 2014-10-06 23:05:04 +00:00
bindings Reinstate "Nuke the old JIT." 2014-09-02 22:28:02 +00:00
cmake Add LLVM_ENABLE_MODULES flag to CMake to enable building with C++ modules. 2014-09-26 22:40:15 +00:00
docs Update documentation with link to Sea Islands documentation 2014-10-06 18:31:09 +00:00
examples Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
include Add size_t MapVector::erase(KeyT) similar to the one in std::map. 2014-10-07 21:15:51 +00:00
lib [X86] Fix a bug with fetch_add(INT32_MIN) 2014-10-07 23:53:57 +00:00
projects
test [X86] Fix a bug with fetch_add(INT32_MIN) 2014-10-07 23:53:57 +00:00
tools [Bugpoint] Close error log in ProcessFailure. Bugpoint had been failing to close 2014-10-07 21:47:23 +00:00
unittests Add return value and negative checks to MapVector::erase from r219240. 2014-10-07 23:11:49 +00:00
utils PR21101: tablegen's FastISel emitter should filter out unused functions. 2014-10-01 22:44:01 +00:00
.arcconfig
.clang-format
.clang-tidy Add .clang-tidy configuration file to provide LLVM-optimized defaults for 2014-09-08 13:30:00 +00:00
.gitignore
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 Remove unused ALL_BINDINGS configuration variable. 2014-10-03 23:03:01 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Remove unused ALL_BINDINGS configuration variable. 2014-10-03 23:03:01 +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
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