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Sanjay Patel 4b96935bd7 [InstCombine] use nsw negation for abs libcalls 
Also, produce the canonical IR abs (s<0) to be more efficient. 

This is the libcall equivalent of the clang builtin change from:
rL333038

Pasting from that commit message:
The stdlib functions are defined in section 7.20.6.1 of the C standard with:
"If the result cannot be represented, the behavior is undefined."

That lets us mark the negation with 'nsw' because "sub i32 0, INT_MIN" would
be UB/poison.

llvm-svn: 333042
 		2018-05-22 23:29:40 +00:00
..
Analysis [InstCombine] Remove calloc transformations 2018-05-22 20:27:36 +00:00
AsmParser [STLExtras] Add distance() for ranges, pred_size(), and succ_size() 2018-05-10 23:01:54 +00:00
BinaryFormat [WebAssembly] Move toString helpers to BinaryFormat 2018-05-14 22:42:07 +00:00
Bitcode [STLExtras] Add distance() for ranges, pred_size(), and succ_size() 2018-05-10 23:01:54 +00:00
CodeGen [MachineOutliner] Add "thunk" outlining for AArch64. 2018-05-22 19:11:06 +00:00
DebugInfo [DebugInfo] Invert DIE order for range errors. 2018-05-22 17:38:03 +00:00
Demangle [demangler] Add a partial demangling API for LLDB. 2018-04-12 20:41:38 +00:00
ExecutionEngine [ORC] Move symbol-scanning and discard from BasicIRLayerMaterializationUnit in 2018-05-22 16:15:38 +00:00
FuzzMutate [llvm-opt-fuzzer] Add irce to the fuzzing options 2018-03-20 11:32:13 +00:00
Fuzzer
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IR [X86] Remove 128/256-bit cvtdq2ps, cvtudq2ps, cvtqq2pd, cvtuqq2pd intrinsics. 2018-05-21 23:15:00 +00:00
IRReader LLParser: add an argument for overriding data layout and do not check alloca addr space 2018-01-30 22:32:39 +00:00
LTO Fix a make_unique ambiguity. 2018-05-21 20:56:28 +00:00
LineEditor
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Linker [ThinLTO] Recommit of import global variables 2018-03-12 10:30:50 +00:00
MC MC: Remove dead code. NFCI. 2018-05-22 01:20:46 +00:00
Object [WebAssembly] Object: Add more error checking for object file reading 2018-05-18 21:08:26 +00:00
ObjectYAML Resubmit [pdb] Change /DEBUG:GHASH to emit 8 byte hashes." 2018-05-17 22:55:15 +00:00
Option Re-revert "[Option] Fix PR37006 prefix choice in findNearest" 2018-05-19 16:21:01 +00:00
Passes Remove \brief commands from doxygen comments. 2018-05-01 15:54:18 +00:00
ProfileData Support: Simplify endian stream interface. NFCI. 2018-05-18 19:46:24 +00:00
Support Revert 332750, llvm part (see comment on D46910). 2018-05-20 23:03:17 +00:00
TableGen Revert r330742: Let TableGen write output only if it changed, instead of doing so in cmake. 2018-05-07 23:41:48 +00:00
Target AMDGPU: Fix v2f16 fneg/fabs pattern 2018-05-22 20:13:34 +00:00
Testing [LLVMTestingSupport] Add explicit linkage to LLVMSupport 2018-04-08 06:49:17 +00:00
ToolDrivers [COFF] Improve correctness of def parsing for GNU features 2018-05-09 09:21:53 +00:00
Transforms [InstCombine] use nsw negation for abs libcalls 2018-05-22 23:29:40 +00:00
WindowsManifest Convert line endings of lib/WindowsManifest/CMakeLists.txt to unix. 2018-04-07 04:28:08 +00:00
XRay [XRay] clarify error messages when parsing broken traces 2018-01-30 13:41:34 +00:00
CMakeLists.txt
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LLVMBuild.txt
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