Jeremy Morse 4395c8f610 [DebugInfo] Don't salvage load operations (PR40628). ... Salvaging a redundant load instruction into a debug expression hides a memory read from optimisation passes. Passes that alter memory behaviour (such as LICM promoting memory to a register) aren't aware of these debug memory reads and leave them unaltered, making the debug variable location point somewhere unsafe. Teaching passes to know about these debug memory reads would be challenging and probably incomplete. Finding dbg.value instructions that need to be fixed would likely be computationally expensive too, as more analysis would be required. It's better to not generate debug-memory-reads instead, alas. Changed tests: * DeadStoreElim: test for salvaging of intermediate operations contributing to the dead store, instead of salvaging of the redundant load, * GVN: remove debuginfo behaviour checks completely, this behaviour is still covered by other tests, * InstCombine: don't test for salvaged loads, we're removing that behaviour. Differential Revision: https://reviews.llvm.org/D57962 llvm-svn: 353824		2019-02-12 10:54:30 +00:00
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AggressiveInstCombine	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Coroutines	[opaque pointer types] Pass value type to LoadInst creation.	2019-02-01 20:44:24 +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] Fix matchRotate bug when one operand is a ConstantExpr shift	2019-02-11 19:26:27 +00:00
Instrumentation	[InstrProf] Implement static profdata registration	2019-02-08 19:03:50 +00:00
IPO	[GlobalOpt] Simplify __cxa_atexit elimination	2019-02-09 09:18:37 +00:00
ObjCARC	[opaque pointer types] Pass function type for CallBase::setCalledFunction.	2019-02-01 20:44:54 +00:00
Scalar	[IndVars] Fix corner case with unreachable Phi inputs. PR40454	2019-02-12 09:59:44 +00:00
Utils	[DebugInfo] Don't salvage load operations (PR40628).	2019-02-12 10:54:30 +00:00
Vectorize	Refactor setAlreadyUnrolled() and setAlreadyVectorized().	2019-02-11 19:45:44 +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