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df3286259b
llvm-mirror/lib
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Sanjay Patel df3286259b [DAGCombiner] don't try to partially reduce add-with-overflow ops 
This transform was added with D58874, but there were no tests for overflow ops.
We need to change this one way or another because it can crash as shown in:
https://llvm.org/PR51238

Note that if there are no uses of an overflow op's bool overflow result, we
reduce it to a regular math op, so we continue to fold that case either way.
If we have uses of both the math and the overflow bool, then we are likely
not saving anything by creating an independent sub instruction as seen in
the test diffs here.

This patch makes the behavior in SDAG consistent with what we do in
instcombine AFAICT.

Differential Revision: https://reviews.llvm.org/D106983

(cherry picked from commit fa6b2c9915ba27e1e97f8901ea4aa877f331fb9f)
2021-08-02 13:52:48 -07:00
..
Analysis [MLGO] fix silly LLVM_DEBUG misuse 2021-07-27 15:10:28 -07:00
AsmParser [IR] Rename comdat noduplicates to comdat nodeduplicate 2021-07-20 12:47:10 -07:00
BinaryFormat [SystemZ][z/OS] Add GOFF support to file magic identification 2021-07-20 10:50:47 -04:00
Bitcode [IR] Rename comdat noduplicates to comdat nodeduplicate 2021-07-20 12:47:10 -07:00
Bitstream
CodeGen [DAGCombiner] don't try to partially reduce add-with-overflow ops 2021-08-02 13:52:48 -07:00
DebugInfo [Debug-Info][llvm-dwarfdump] Don't try to dump location 2021-07-27 07:28:59 +00:00
Demangle Demangle: correct swift_async demangling for Microsoft scheme 2021-07-14 11:43:44 -07:00
DWARFLinker [Debug-Info][llvm-dwarfdump] Don't try to dump location 2021-07-27 07:28:59 +00:00
DWP [DWP] Refactoring llvm-dwp in to a library part 2 2021-07-22 14:23:29 -07:00
ExecutionEngine [ORC] Require ExecutorProcessControl when constructing an ExecutionSession. 2021-07-27 16:53:49 +10:00
Extensions llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
FileCheck [llvm] Rename StringRef _lower() method calls to _insensitive() 2021-06-25 00:22:01 +03:00
Frontend [mlir][openacc] Initial translation for DataOp to LLVM IR 2021-07-27 22:04:04 -04:00
Fuzzer
FuzzMutate [NewPM][FuzzMutate] Fix renaming 'unswitch' to 'simple-loop-unswitch' 2021-07-09 12:24:12 +02:00
InterfaceStub IFSStub.cpp - consistently use default case to silence 'not all control paths return' MSVC warnings. NFCI. 2021-07-21 11:59:34 +01:00
IR Strip undef implying attributes when moving calls 2021-07-27 10:57:05 -04:00
IRReader [NFC] Reordering parameters in getFile and getFileOrSTDIN 2021-03-25 09:47:49 -04:00
LineEditor
Linker [IR] Rename comdat noduplicates to comdat nodeduplicate 2021-07-20 12:47:10 -07:00
LTO PR51018: Remove explicit conversions from SmallString to StringRef to future-proof against C++23 2021-07-08 13:37:57 -07:00
MC [SystemZ][z/OS] Initial code to generate assembly files on z/OS 2021-07-27 11:29:15 -04:00
MCA [MCA] [In-order pipeline] Fix for 0 latency instruction causing assertion to fail. 2021-06-22 10:18:39 -07:00
Object [Object] make SourceMgr available to MCContext during inline asm symbols 2021-07-25 21:23:03 -07:00
ObjectYAML [yaml2obj][MachO] Rename PayloadString to Content 2021-07-26 09:04:51 -07:00
Option [OptTable] Rename PrintHelp to printHelp 2021-06-24 14:47:03 -07:00
Passes Add jump-threading optimization for deterministic finite automata 2021-07-27 14:34:04 -04:00
ProfileData [profile] Add binary id into profiles 2021-07-23 00:19:12 +00:00
Remarks [Support] Don't include VirtualFileSystem.h in CommandLine.h 2021-04-21 10:19:01 -04:00
Support Build libSupport with -Werror=global-constructors (NFC) 2021-07-27 04:27:18 +00:00
TableGen DetailedRecordsBackend.cpp - printSectionHeading - avoid std::string creation/copies. 2021-06-13 16:49:40 +01:00
Target [RISCV] Restrict performANY_EXTENDCombine to prevent an infinite loop. 2021-08-02 11:31:08 -07:00
Testing Fix for error "'Run' overrides a member function but is not marked 2021-06-11 06:56:00 -07:00
TextAPI Reland "[llvm] llvm-tapi-diff" 2021-06-09 21:17:34 -07:00
ToolDrivers [OptTable] Rename PrintHelp to printHelp 2021-06-24 14:47:03 -07:00
Transforms [DivRemPairs] make sure we have a valid CFG for hoisting division 2021-08-02 13:52:37 -07:00
WindowsManifest llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
XRay [lib/Object, tools] - Make ELFObjectFile::getELFFile return reference. 2020-12-04 16:02:29 +03:00
CMakeLists.txt [DWP] Refactoring llvm-dwp in to a library part 2 2021-07-22 14:23:29 -07:00