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Roman Lebedev ff21e3f055 [ConstantFolding] Fix 'undef' folding for @llvm.[us]{add,sub}.with.overflow ops (PR43188) 
As we have already established/fixed in
  https://bugs.llvm.org/show_bug.cgi?id=42209
  https://reviews.llvm.org/D63065
  https://reviews.llvm.org/rL363522
the InstSimplify handling for @llvm.with.overflow ops with undefs
is correct. Therefore if ConstantFolding produces different results,
then it is wrong.

This duplication of code hints at the need for some refactoring,
but for now address the brokenness of ConstantFolding by
copying the known-good handling from rL363522.

Fixes https://bugs.llvm.org/show_bug.cgi?id=43188

llvm-svn: 370608
 		2019-09-01 11:56:52 +00:00
..
Analysis [MemorySSA] Rename all phi entries. 2019-08-30 23:02:53 +00:00
Assembler Debug Info: Support for DW_AT_export_symbols for anonymous structs 2019-08-23 17:19:21 +00:00
Bindings Revert "Expose TailCallKind via the LLVM C API" 2019-08-15 03:49:51 +00:00
Bitcode [BitcodeReader] Check if we can create a null constant for type. 2019-08-21 18:20:11 +00:00
BugPoint
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CodeGen [ARM] Remove MVE masked loads/stores 2019-09-01 10:11:40 +00:00
DebugInfo [Windows] Disable TrapUnreachable for Win64, add SEH_NoReturn 2019-08-30 20:46:39 +00:00
Demangle
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Examples
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ExecutionEngine [JITLink] Don't under-align zero-fill sections. 2019-08-27 15:22:23 +00:00
Feature [FPEnv] Add fptosi and fptoui constrained intrinsics. 2019-08-28 16:33:36 +00:00
FileCheck [FileCheck] Move -dump-input diagnostic to first line 2019-08-14 02:56:09 +00:00
Instrumentation [ASan] Version mismatch check follow-up 2019-08-29 20:20:05 +00:00
Integer
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JitListener
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LTO Revert r370105 - Update two x86 datalayouts for r370083, looks like racing commits 2019-08-28 01:55:06 +00:00
Linker IR: print value numbers for unnamed function arguments 2019-08-03 14:28:34 +00:00
MC [WebAssembly] Add SIMD QFMA/QFMS 2019-08-31 00:12:29 +00:00
MachineVerifier Remove unnecessary REQUIRES from a test. 2019-08-24 02:39:51 +00:00
Object [llvm-readobj/llvm-readelf] - Report a proper warning when dumping a broken dynamic relocation. 2019-08-29 10:55:57 +00:00
ObjectYAML [ObjectYAML] Fix lifetime issue in dumpDebugLines 2019-08-29 02:36:48 +00:00
Other Revert enabling MemorySSA. 2019-08-29 19:01:23 +00:00
Reduce [Bugpoint redesign] Added Pass to Remove Global Variables 2019-08-15 22:54:09 +00:00
SafepointIRVerifier
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Support
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SymbolRewriter
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TableGen GlobalISel/TableGen: Handle setcc patterns 2019-08-29 01:13:41 +00:00
ThinLTO/X86 Revert r370105 - Update two x86 datalayouts for r370083, looks like racing commits 2019-08-28 01:55:06 +00:00
Transforms [ConstantFolding] Fix 'undef' folding for @llvm.[us]{add,sub}.with.overflow ops (PR43188) 2019-09-01 11:56:52 +00:00
Unit
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Verifier [IntrinsicEmitter] Support scalable vectors in intrinsics 2019-08-27 12:57:09 +00:00
YAMLParser
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tools [SampleFDO] Add profile symbol list section to discriminate function being 2019-08-31 02:27:26 +00:00
.clang-format
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CMakeLists.txt [llvm-ifs][IFS] llvm Interface Stubs merging + object file generation tool. 2019-08-30 18:26:05 +00:00
TestRunner.sh
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lit.cfg.py [llvm-ifs][IFS] llvm Interface Stubs merging + object file generation tool. 2019-08-30 18:26:05 +00:00
lit.site.cfg.py.in
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