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LLVM backend for 6502
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Jim Grosbach cbf676b3ba float comparison to double 'zero' constant can just be a float 'zero.' 
InstCombine was incorrectly considering the conversion of the constant
zero to be unsafe.

We want to transform:
define float @bar(float %x) nounwind readnone optsize ssp {
  %conv = fpext float %x to double
  %cmp = fcmp olt double %conv, 0.000000e+00
  %conv1 = zext i1 %cmp to i32
  %conv2 = sitofp i32 %conv1 to float
  ret float %conv2
}

Into:
define float @bar(float %x) nounwind readnone optsize ssp {
  %cmp = fcmp olt float %x, 0.000000e+00   ; <---- This
  %conv1 = zext i1 %cmp to i32
  %conv2 = sitofp i32 %conv1 to float
  ret float %conv2
}


rdar://10215914


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140869 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-30 18:45:50 +00:00
autoconf We're no longer going to bother supporting platforms that don't 2011-09-23 00:53:10 +00:00
bindings Remove the build_unwind function from the OCaml bindings. 2011-08-10 01:10:17 +00:00
cmake Rename LLVM_MULTITHREADED define and fix build without threads. 2011-09-19 20:43:23 +00:00
docs some 3.0 API notes 2011-09-30 13:07:52 +00:00
examples Changed comments on foreign C++ exceptions (generated with type info 7), 2011-09-28 10:53:56 +00:00
include Tidy up. Formatting. 2011-09-29 21:43:01 +00:00
lib float comparison to double 'zero' constant can just be a float 'zero.' 2011-09-30 18:45:50 +00:00
projects Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
runtime Fix for warnings: ignoring return value of ‘write’, declared with attribute warn_unused_result. 2011-09-22 17:33:24 +00:00
test float comparison to double 'zero' constant can just be a float 'zero.' 2011-09-30 18:45:50 +00:00
tools Simplify. 2011-09-29 17:06:40 +00:00
unittests Fix a bug in compare_numeric(). 2011-09-30 17:03:55 +00:00
utils Precompute a bit vector of register sub-classes. 2011-09-30 00:10:40 +00:00
website
.gitignore Revert change made in .gitignore. 2011-09-24 01:37:58 +00:00
build-for-llvm-top.sh Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
CMakeLists.txt Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
configure We're no longer going to bother supporting platforms that don't 2011-09-23 00:53:10 +00:00
CREDITS.TXT Claimed. 2011-09-19 05:34:10 +00:00
LICENSE.TXT Happy new year. 2011-06-12 15:26:54 +00:00
llvm.spec.in
Makefile Remove llvmc and assorted build machinery for it. 2011-09-19 23:22:41 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in Remove the rest of the compiler checking from the top level configure 2011-09-21 00:53:42 +00:00
Makefile.rules More llvmc bits. Spotted by Benjamin on IRC. 2011-09-20 00:42:28 +00:00
ModuleInfo.txt Remove trailing space. This is just an excuse to poke the 2010-10-05 20:32:15 +00:00
README.txt Test commit 2011-09-21 03:34:31 +00:00

README.txt 

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

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