Wei Mi e25039a021 [GVN] Verify value equality before doing phi translation for call instruction ... This is an updated version of https://reviews.llvm.org/D66909 to fix PR42605. Basically, current phi translatation translates an old value number to an new value number for a call instruction based on the literal equality of call expression, without verifying there is no clobber in between. This is incorrect. To get a finegrain check, use MachineDependence analysis to do the job. However, this is still not ideal. Although given a call instruction, `MemoryDependenceResults::getCallDependencyFrom` returns identical call instructions without clobber in between using MemDepResult with its DepType to be `Def`. However, identical is too strict here and we want it to be relaxed a little to consider phi-translation -- callee is the same, param operands can be different. That means changing the semantic of `MemDepResult::Def` and I don't know the potential impact. So currently the patch is still conservative to only handle MemDepResult::NonFuncLocal, which means the current call has no function local clobber. If there is clobber, even if the clobber doesn't stand in between the current call and the call with the new value, we won't do phi-translate. Differential Revision: https://reviews.llvm.org/D67013 llvm-svn: 370547		2019-08-30 23:01:22 +00:00
..
AggressiveInstCombine	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Coroutines	[llvm] Migrate llvm::make_unique to std::make_unique	2019-08-15 15:54:37 +00:00
Hello	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
InstCombine	[InstCombine][AMDGPU] Simplify tbuffer loads	2019-08-30 14:20:04 +00:00
Instrumentation	[ASan] Make insertion of version mismatch guard configurable	2019-08-28 20:40:55 +00:00
IPO	[Attributor] Fix: do not pretend to preserve the CFG	2019-08-30 16:35:10 +00:00
ObjCARC	[ObjC][ARC] Delete ObjC runtime calls on global variables annotated	2019-06-14 22:06:32 +00:00
Scalar	[GVN] Verify value equality before doing phi translation for call instruction	2019-08-30 23:01:22 +00:00
Utils	Revert enabling MemorySSA.	2019-08-29 19:01:23 +00:00
Vectorize	[LV] Fold tail by masking - handle reductions	2019-08-28 09:02:23 +00:00
CMakeLists.txt
LLVMBuild.txt	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00