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LLVM backend for 6502
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81b28ceab6
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Dan Gohman 81b28ceab6 Improve instcombine's handling of integer min and max in two ways: 
- Recognize expressions like "x > -1 ? x : 0" as min/max and turn them
   into expressions like "x < 0 ? 0 : x", which is easily recognizable
   as a min/max operation.
 - Refrain from folding expression like "y/2 < 1" to "y < 2" when the
   comparison is being used as part of a min or max idiom, like
   "y/2 < 1 ? 1 : y/2". In that case, the division has another use, so
   folding doesn't eliminate it, and obfuscates the min/max, making it
   harder to recognize as a min/max operation.

These benefit ScalarEvolution, CodeGen, and anything else that wants to
recognize integer min and max.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56246 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-16 18:46:06 +00:00
autoconf Reapply majority of r55557 but with the changes to compilation flags 2008-09-02 17:35:16 +00:00
bindings PR2731: C and Ocaml bindings for setTailCall and isTailCall. 2008-08-30 16:34:54 +00:00
docs Fix documentation for these functions; they do not only modify users within the 2008-09-15 06:31:52 +00:00
examples Switch the asmprinter (.ll) and all the stuff it requires over to 2008-08-23 22:23:09 +00:00
include FCmpInst predicates UNO, ORD, FALSE, and TRUE are commutative. 2008-09-16 16:44:00 +00:00
lib Improve instcombine's handling of integer min and max in two ways: 2008-09-16 18:46:06 +00:00
projects Add "sample" documentation to sample project. 2008-09-15 05:31:29 +00:00
runtime
test Improve instcombine's handling of integer min and max in two ways: 2008-09-16 18:46:06 +00:00
tools End of the GlobalsModRef experiment. 2008-09-15 18:42:38 +00:00
utils Extract optimization pass selection code from llvm-gcc into a separate routine. 2008-09-15 21:13:42 +00:00
website
win32 Update VC++ project files. 2008-09-09 11:38:37 +00:00
Xcode
build-for-llvm-top.sh
configure Enable -fvisibility-inlines-hidden by default for compilers which 2008-08-30 01:16:19 +00:00
CREDITS.TXT Add another description to my entry. 2008-08-28 23:16:37 +00:00
LICENSE.TXT
llvm.spec.in
Makefile
Makefile.common
Makefile.config.in Reapply majority of r55557 but with the changes to compilation flags 2008-09-02 17:35:16 +00:00
Makefile.rules Reapply majority of r55557 but with the changes to compilation flags 2008-09-02 17:35:16 +00:00
ModuleInfo.txt
README.txt

README.txt 

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