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Hal Finkel 5d5d1539cc [PowerPC] Mark zext of a small scalar load as free 
This initial implementation of PPCTargetLowering::isZExtFree marks as free
zexts of small scalar loads (that are not sign-extending). This callback is
used by SelectionDAGBuilder's RegsForValue::getCopyToRegs, and thus to
determine whether a zext or an anyext is used to lower illegally-typed PHIs.
Because later truncates of zero-extended values are nops, this allows for the
elimination of later unnecessary truncations.

Fixes the initial complaint associated with PR22120.

llvm-svn: 225584
 		2015-01-10 08:21:59 +00:00
..
Analysis remove names from comments; NFC 2015-01-09 16:47:20 +00:00
AsmParser IR: Add 'distinct' MDNodes to bitcode and assembly 2015-01-08 22:38:29 +00:00
Bitcode Use the DiagnosticHandler to print diagnostics when reading bitcode. 2015-01-10 00:07:30 +00:00
CodeGen Recommit r224935 with a fix for the ObjC++/AArch64 bug that that revision 2015-01-09 18:55:42 +00:00
DebugInfo Implement a very basic colored syntax highlighting for llvm-dwarfdump. 2015-01-06 16:50:25 +00:00
ExecutionEngine Fix undefined behavior (shift of negative value) in RuntimeDyldMachOAArch64::encodeAddend. 2015-01-10 00:46:38 +00:00
IR Cleaup ValueHandle to no longer keep a PointerIntPair for the Value*. 2015-01-09 00:48:47 +00:00
IRReader Remove unused variable. NFC. 2014-11-06 23:16:57 +00:00
LTO Use the DiagnosticHandler to print diagnostics when reading bitcode. 2015-01-10 00:07:30 +00:00
LineEditor
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Linker Use the DiagnosticHandler to print diagnostics when reading bitcode. 2015-01-10 00:07:30 +00:00
MC Recommit r224935 with a fix for the ObjC++/AArch64 bug that that revision 2015-01-09 18:55:42 +00:00
Object Don't loop endlessly for MachO files with 0 ncmds 2015-01-06 17:08:26 +00:00
Option Add an overload of getLastArgNoClaim taking two OptSpecifiers. 2014-09-12 19:42:53 +00:00
ProfileData llvm-cov: Sink some reporting logic into CoverageMapping 2014-11-14 01:50:32 +00:00
Support Triple: Add amdgcn triple 2015-01-06 18:00:00 +00:00
TableGen Clean up static analyzer warnings. 2014-12-12 21:48:03 +00:00
Target [PowerPC] Mark zext of a small scalar load as free 2015-01-10 08:21:59 +00:00
Transforms [LoopUnroll] Fix the partial unrolling threshold for small loop sizes 2015-01-10 00:30:55 +00:00
CMakeLists.txt
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LLVMBuild.txt
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Makefile
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