llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-06 05:06:45 +00:00

LLVM backend for 6502

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Chandler Carruth baf868b9b8 Switch this code away from Value::isUsedInBasicBlock. That code either loops over instructions in the basic block or the use-def list of the value, neither of which are really efficient when repeatedly querying about values in the same basic block. What's more, we already know that the CondBB is small, and so we can do a much more efficient test by counting the uses in CondBB, and seeing if those account for all of the uses. Finally, we shouldn't blanket fail on any such instruction, instead we should conservatively assume that those instructions are part of the cost. Note that this actually fixes a bug in the pass because isUsedInBasicBlock has a really terrible bug in it. I'll fix that in my next commit, but the fix for it would make this code suddenly take the compile time hit I thought it already was taking, so I wanted to go ahead and migrate this code to a faster & better pattern. The bug in isUsedInBasicBlock was also causing other tests to test the wrong thing entirely: for example we weren't actually disabling speculation for floating point operations as intended (and tested), but the test passed because we failed to speculate them due to the isUsedInBasicBlock failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173417 91177308-0d34-0410-b5e6-96231b3b80d8		2013-01-25 05:40:09 +00:00
autoconf	Disable Uninitialized Use Warnings for Broken gcc Versions	2013-01-15 18:21:15 +00:00
bindings
cmake	Add time getters to the process interface for requesting the elapsed	2013-01-04 23:19:55 +00:00
docs	Fix small typo	2013-01-23 22:05:19 +00:00
examples	Update links to "Itanium C++ ABI: Exception Handling" document	2013-01-13 15:53:09 +00:00
include	MISched: Add SchedDFSResult to ScheduleDAGMI to formalize the	2013-01-25 04:01:04 +00:00
lib	Switch this code away from Value::isUsedInBasicBlock. That code either	2013-01-25 05:40:09 +00:00
projects
runtime
test	Switch this code away from Value::isUsedInBasicBlock. That code either	2013-01-25 05:40:09 +00:00
tools	[bugpoint] make tool selection messages unique	2013-01-24 16:49:14 +00:00
unittests	unittests/SupportTests/Initialize.MultipleThreads: Enable pthread_attr_setstack(3) only on Linux.	2013-01-24 15:29:27 +00:00
utils	Add the IR attribute 'sspstrong'.	2013-01-23 06:41:41 +00:00
.arcconfig
.gitignore
CMakeLists.txt	Fix spelling	2012-12-13 15:25:07 +00:00
CODE_OWNERS.TXT	Update CODE_OWNERS.TXT.	2013-01-15 09:37:45 +00:00
configure	Disable Uninitialized Use Warnings for Broken gcc Versions	2013-01-15 18:21:15 +00:00
CREDITS.TXT
LICENSE.TXT	Add LICENSE.TXT covering contributions made by ARM.	2013-01-07 10:04:49 +00:00
llvm.spec.in
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
Makefile
Makefile.common
Makefile.config.in	Introduce llvm::sys::getProcessTriple() function.	2013-01-16 17:27:22 +00:00
Makefile.rules	Pass NO_MISSING_FIELD_INITIALIZERS to Compiler Flags	2013-01-18 23:22:52 +00:00
README.txt	Update README.txt to more accurately reflect reality.	2013-01-08 02:35:15 +00:00

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