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6d6e55b42f
llvm-mirror/lib
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Simon Pilgrim 6d6e55b42f [DAGCombiner] Attempt to mask vectors before zero extension instead of after. 
For cases where we TRUNCATE and then ZERO_EXTEND to a larger size (often from vector legalization), see if we can mask the source data and then ZERO_EXTEND (instead of after a ANY_EXTEND). This can help avoid having to generate a larger mask, and possibly applying it to several sub-vectors.

(zext (truncate x)) -> (zext (and(x, m))

Includes a minor patch to SystemZ to better recognise 8/16-bit zero extension patterns from RISBG bit-extraction code.

This is the first of a number of minor patches to help improve the conversion of byte masks to clear mask shuffles.

Differential Revision: http://reviews.llvm.org/D11764

llvm-svn: 245160
2015-08-15 13:27:30 +00:00
..
Analysis [PM/AA] Delete the LibCallAliasAnalysis and all the associated 2015-08-15 09:22:21 +00:00
AsmParser [IR] Give catchret an optional 'return value' operand 2015-08-15 02:46:08 +00:00
Bitcode [IR] Give catchret an optional 'return value' operand 2015-08-15 02:46:08 +00:00
CodeGen [DAGCombiner] Attempt to mask vectors before zero extension instead of after. 2015-08-15 13:27:30 +00:00
DebugInfo Fix some comment typos. 2015-08-08 18:27:36 +00:00
ExecutionEngine [RuntimeDyld] Make sure code-sections aren't under-aligned. 2015-08-14 06:26:42 +00:00
Fuzzer Fix missing space in libfuzzer's help text. 2015-08-12 20:00:10 +00:00
IR [IR] Give catchret an optional 'return value' operand 2015-08-15 02:46:08 +00:00
IRReader Return a unique_ptr from getLazyBitcodeModule and parseBitcodeFile. NFC. 2015-06-16 22:27:55 +00:00
LibDriver There is only one saver of strings. 2015-08-13 01:07:02 +00:00
LineEditor
Linker Linker: Move distinct MDNodes instead of cloning 2015-08-03 17:09:38 +00:00
LTO Remove access to the DataLayout in the TargetMachine 2015-07-24 16:04:22 +00:00
MC Revert "Centralize the information about which object format we are using." 2015-08-14 15:48:41 +00:00
Object Convert getSymbolSection to return an ErrorOr. 2015-08-07 23:27:14 +00:00
Option Add an ArgList::AddAllArgs that accepts a vector of OptSpecifier. 2015-07-29 17:34:41 +00:00
Passes
ProfileData Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Support Add a target environment for CoreCLR. 2015-08-14 22:41:43 +00:00
TableGen TableGen: Support folding casts from bits to int 2015-07-31 01:12:06 +00:00
Target [DAGCombiner] Attempt to mask vectors before zero extension instead of after. 2015-08-15 13:27:30 +00:00
Transforms [IR] Give catchret an optional 'return value' operand 2015-08-15 02:46:08 +00:00
CMakeLists.txt LibDriver, llvm-lib: introduce. 2015-06-09 21:50:22 +00:00
LLVMBuild.txt Wrap some long lines in LLVMBuild files. NFC 2015-06-12 18:44:57 +00:00
Makefile LibDriver, llvm-lib: introduce. 2015-06-09 21:50:22 +00:00