llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-01 15:11:24 +00:00

LLVM backend for 6502

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Oliver Stannard 19d010b851 [ARM] Do not select SMULW[BT] or SMLAW[BT] The current instruction selection patterns for SMULW[BT] and SMLAW[BT] are incorrect. These instructions multiply a 32-bit and a 16-bit value (both signed) and return the top 32 bits of the 48-bit result. This preserves the 16 bits of overflow, whereas the patterns they currently match truncate the result to 16 bits then sign extend. To select these instructions, we would need to match an ISD::SMUL_LOHI, a sign extend, two shifts and an or. There is no way to match SMUL_LOHI in an instruction pattern as it defines multiple values, so this would have to be done in C++. I have raised http://llvm.org/bugs/show_bug.cgi?id=21297 to cover allowing correct selection of these instructions. This fixes http://llvm.org/bugs/show_bug.cgi?id=19396 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220196 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-20 11:30:35 +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	Always use -Wl,-gc-sections on our build.	2014-10-19 23:24:46 +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	Switch the default DataLayout to be little endian, and make the variable	2014-10-20 10:41:29 +00:00
lib	[ARM] Do not select SMULW[BT] or SMLAW[BT]	2014-10-20 11:30:35 +00:00
projects	[cmake] Use the external project machinery for libcxxabi so that it can	2014-07-25 10:27:40 +00:00
test	[ARM] Do not select SMULW[BT] or SMLAW[BT]	2014-10-20 11:30:35 +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 a 'find_as' operation to DenseSet.	2014-10-19 19:36:33 +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	Remove the very substantial, largely unmaintained legacy PGO	2013-10-02 15:42:23 +00:00
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

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