Richard Sandiford f84d58699b [SystemZ] Fix choice of known-zero mask in insertion optimization ...

The backend converts 64-bit ORs into subreg moves if the upper 32 bits
of one operand and the low 32 bits of the other are known to be zero.
It then tries to peel away redundant ANDs from the upper 32 bits.

Since AND masks are canonicalized to exclude known-zero bits,
the test ORs the mask and the known-zero bits together before
checking for redundancy.  The problem was that it was using the
wrong node when checking for known-zero bits, so could drop ANDs
that were still needed.

llvm-svn: 196267

2013-12-03 11:01:54 +00:00

..

Analysis

[PM] Split the CallGraph out from the ModulePass which creates the

2013-11-26 04:19:30 +00:00

AsmParser

Debug Info: drop debug info via upgrading path if version number does not match.

2013-12-02 21:29:56 +00:00

Bitcode

Debug Info: drop debug info via upgrading path if version number does not match.

2013-12-02 21:29:56 +00:00

CodeGen

Added MachineBlockFrequencyInfo::view for displaying the block frequency propagation graph via graphviz.

2013-12-03 00:49:33 +00:00

DebugInfo

DebugInfo: Avoid emitting pubtype entries for type DIEs that just indirect to a type unit.

2013-11-26 00:22:37 +00:00

ExecutionEngine

Use the mangler consistently instead of using getGlobalPrefix directly.

2013-11-28 08:59:52 +00:00

IR

llvm-cov: Cleaned up print() function slightly.

2013-12-03 01:35:31 +00:00

IRReader

[llvm-c] Expose IRReader interface

2013-11-06 09:21:15 +00:00

Linker

Revert "Move copying of global initializers below the cloning of functions."

2013-11-09 00:43:18 +00:00

LTO

Use array_pod_sort instead of std::sort

2013-11-16 16:15:56 +00:00

MC

Refactor the setting of PrivateGlobalPrefix.

2013-12-02 23:39:26 +00:00

Object

Path: Recognize COFF import library file magic.

2013-11-15 21:22:02 +00:00

Option

Use startswith_lower() where possible.

2013-11-04 19:22:50 +00:00

Support

Lift self-copy protection up to the header file and add self-move

2013-11-26 00:54:44 +00:00

TableGen

Fix most memory leaks in tablegen.

2013-10-31 04:07:41 +00:00

Target

[SystemZ] Fix choice of known-zero mask in insertion optimization

2013-12-03 11:01:54 +00:00

Transforms

Use local variable for repeated use rather than 'get' method. No functional change intended.

2013-12-02 22:23:32 +00:00

CMakeLists.txt

Move LTO support library to a component, allowing it to be tested

2013-09-24 23:52:22 +00:00

LLVMBuild.txt

Move LTO support library to a component, allowing it to be tested

2013-09-24 23:52:22 +00:00

Makefile

Reformat Makefile. No other changes.

2013-10-30 04:03:03 +00:00