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LLVM backend for 6502
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Arnold Schwaighofer c46e2df74c DAGCombiner: Fold pointless truncate, bitcast, buildvector series 
(2xi32) (truncate ((2xi64) bitcast (buildvector i32 a, i32 x, i32 b, i32 y)))
can be folded into a (2xi32) (buildvector i32 a, i32 b).

Such a DAG would cause uneccessary vdup instructions followed by vmovn
instructions.

We generate this code on ARM NEON for a setcc olt, 2xf64, 2xf64. For example, in
the vectorized version of the code below.

double A[N];
double B[N];

void test_double_compare_to_double() {
  int i;
  for(i=0;i<N;i++)
    A[i] = (double)(A[i] < B[i]);
}

radar://13191881

Fixes bug 15283.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175670 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-20 21:33:32 +00:00
autoconf configure: remove workaround for gcc's -Wno-maybe-uninitialized 2013-02-13 21:19:39 +00:00
bindings
cmake Use correct host/target CMake variables to define lit variables. 2013-02-14 16:49:32 +00:00
docs Spelling corrections 2013-02-18 02:44:09 +00:00
examples
include Update TargetLowering ivars for name policy. 2013-02-20 21:13:59 +00:00
lib DAGCombiner: Fold pointless truncate, bitcast, buildvector series 2013-02-20 21:33:32 +00:00
projects
runtime Use 'RC_XBS' instead of 'RC_BUILDIT' to catch all times when it's built in the Apple way. 2013-02-13 19:44:08 +00:00
test DAGCombiner: Fold pointless truncate, bitcast, buildvector series 2013-02-20 21:33:32 +00:00
tools [objdump] Print the PT_INTERP and PT_DYNAMIC correcctly. 2013-02-20 20:18:10 +00:00
unittests Move the SplatByte helper to APInt and generalize it a bit. 2013-02-20 13:00:06 +00:00
utils Fix for bug 15246 -- out-of-bound error in the TableGen backend, CodeGenMapTable.cpp. 2013-02-14 17:58:13 +00:00
.arcconfig
.gitignore
CMakeLists.txt Revert CMake version bump since we don't actually need 2.8.6 any more. 2013-02-18 11:53:37 +00:00
CODE_OWNERS.TXT Add myself as code owner of AArch64 backend. 2013-01-31 12:51:16 +00:00
configure configure: remove workaround for gcc's -Wno-maybe-uninitialized 2013-02-13 21:19:39 +00:00
CREDITS.TXT Update my email address. 2012-11-29 21:17:26 +00:00
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
Makefile.rules Use 'RC_XBS' instead of 'RC_BUILDIT' to catch all times when it's built in the Apple way. 2013-02-13 19:44:08 +00:00
README.txt Update README.txt to more accurately reflect reality. 2013-01-08 02:35:15 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
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LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
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documentation setup.

If you're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.