Vedant Kumar bf2ff1c06a Revert "This patch closes PR28513: an optimization of multiplication by different constants. It's implemented on DAG combiner level." ... This reverts commit r304209. I think this change is responsible for a tablgen failure in stage2 builds: http://green.lab.llvm.org/green/job/clang-stage2-configure-Rthinlto_build/2171/ I reproduced the failure locally (without ThinLTO), reverted the commit, rebuilt the stage1 clang, rebuilt the stage2 llvm-tblgen tool, and found that the crash disappears when the commit is reverted. Here is the stack trace: FAILED: lib/Target/ARM/ARMGenRegisterBank.inc.tmp cd /Volumes/Builds/pz-master-stage2-RA/lib/Target/ARM && /Volumes/Builds/pz-master-stage2-RA/bin/llvm-tblgen -gen-register-bank -I /Users/vk/llvm/lib/Target/ARM -I /Users/vk/llvm/include -I /Users/vk/llvm/lib/Target /Users/vk/llvm/lib/Target/ARM/ARM.td -o /Volumes /Builds/pz-master-stage2-RA/lib/Target/ARM/ARMGenRegisterBank.inc.tmp 0 llvm-tblgen 0x0000000106fc9568 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40 1 llvm-tblgen 0x0000000106fc9be6 SignalHandler(int) + 422 2 libsystem_platform.dylib 0x00000001076a7fba _sigtramp + 26 3 libsystem_platform.dylib 0x00007fff58deb468 _sigtramp + 1366570184 4 llvm-tblgen 0x0000000106e89cc7 llvm::CodeGenRegBank::getCompositeSubRegIndex(llvm::CodeGenSubRegIndex*, llvm::CodeGenSubRegIndex*) + 615 5 llvm-tblgen 0x0000000106e88be6 llvm::CodeGenRegister::computeSubRegs(llvm::CodeGenRegBank&) + 2182 6 llvm-tblgen 0x0000000106e8e9f0 llvm::CodeGenRegBank::CodeGenRegBank(llvm::RecordKeeper&) + 2192 7 llvm-tblgen 0x0000000106f384a1 llvm::EmitRegisterBank(llvm::RecordKeeper&, llvm::raw_ostream&) + 65 8 llvm-tblgen 0x0000000106f72c64 (anonymous namespace)::LLVMTableGenMain(llvm::raw_ostream&, llvm::RecordKeeper&) + 1172 9 llvm-tblgen 0x0000000106fcb15f llvm::TableGenMain(char*, bool (*)(llvm::raw_ostream&, llvm::RecordKeeper&)) + 3599 10 llvm-tblgen 0x0000000106f727a6 main + 134 11 libdyld.dylib 0x000000010733c6a5 start + 1 Stack dump: 0. Program arguments: /Volumes/Builds/pz-master-stage2-RA/bin/llvm-tblgen -gen-register-bank -I /Users/vk/llvm/lib/Target/ARM -I /Users/vk/llvm/include -I /Users/vk/llvm/lib/Target /Users/vk/llvm/lib/Target/ARM/ARM.td -o /Volumes/Builds/pz-master-stage2-RA/lib/Target/ARM/ARMGenRegisterBank.inc.tmp /bin/sh: line 1: 41986 Segmentation fault: 11 /Volumes/Builds/pz-master-stage2-RA/bin/llvm-tblgen -gen-register-bank -I /Users/vk/llvm/lib/Target/ARM -I /Users/vk/llvm/include -I /Users/vk/llvm/lib/Target /Users/vk/llvm/lib/Target/ARM/ARM.td -o /Volumes/Builds/pz -master-stage2-RA/lib/Target/ARM/ARMGenRegisterBank.inc.tmp llvm-svn: 304231		2017-05-30 19:25:22 +00:00
..
Analysis	[SCEV] Assume parameters coming from function calls contain IVs	2017-05-27 15:17:49 +00:00
Assembler
Bindings
Bitcode
BugPoint
CodeGen	Revert "This patch closes PR28513: an optimization of multiplication by different constants. It's implemented on DAG combiner level."	2017-05-30 19:25:22 +00:00
DebugInfo	DebugInfo: Include .dwo file name when hashing multiple CUs in a single file	2017-05-29 06:32:34 +00:00
Examples
ExecutionEngine	[RuntimeDyld, PowerPC] Fix check for external symbols when detecting reloction overflow	2017-05-23 14:51:18 +00:00
Feature	Add constrained intrinsics for some libm-equivalent operations	2017-05-25 21:31:00 +00:00
FileCheck
Instrumentation	Fix coverage check for full post-dominator basic blocks.	2017-05-25 01:41:46 +00:00
Integer
JitListener
LibDriver
Linker	Support for taking the max of module flags when linking, use for PIE/PIC	2017-05-23 00:08:00 +00:00
LTO	PMB: Run the whole-program-devirt pass during LTO at --lto-O0.	2017-05-26 18:27:13 +00:00
MC	[SystemZ] Add decimal floating-point instructions	2017-05-30 10:15:16 +00:00
Object
ObjectYAML
Other	[PM] Enable the new simple loop unswitch pass in the new pass manager	2017-05-26 01:24:11 +00:00
SymbolRewriter
TableGen	[globalisel][tablegen] Add support for (set $dst, 1) and test X86's OptForSize predicate.	2017-05-23 19:33:16 +00:00
ThinLTO/X86
tools	Adding parsing ability for .res file.	2017-05-30 18:19:06 +00:00
Transforms	[InstCombine] Add test cases to show missed opportunities to remove compare instructions after cttz/ctlz/ctpop where some bits of the input is known.	2017-05-30 17:47:59 +00:00
Unit
Verifier	Add constrained intrinsics for some libm-equivalent operations	2017-05-25 21:31:00 +00:00
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg
lit.site.cfg.in
TestRunner.sh