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llvm-project/llvm/lib/Transforms/Utils
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Adrian Prantl f5834a4b49 This reapplies r207130 with an additional testcase+and a missing check for 
AllocaInst that was missing in one location.
Debug info for optimized code: Support variables that are on the stack and
described by DBG_VALUEs during their lifetime.

Previously, when a variable was at a FrameIndex for any part of its
lifetime, this would shadow all other DBG_VALUEs and only a single
fbreg location would be emitted, which in fact is only valid for a small
range and not the entire lexical scope of the variable. The included
dbg-value-const-byref testcase demonstrates this.

This patch fixes this by
Local
- emitting dbg.value intrinsics for allocas that are passed by reference
- dropping all dbg.declares (they are now fully lowered to dbg.values)
SelectionDAG
- renamed constructors for SDDbgValue for better readability.
- fix UserValue::match() to handle indirect values correctly
- not inserting an MMI table entries for dbg.values that describe allocas.
- lowering dbg.values that describe allocas into *indirect* DBG_VALUEs.
CodeGenPrepare
- leaving dbg.values for an alloca were they are (see comment)
Other
- regenerated/updated instcombine.ll testcase and included source

rdar://problem/16679879
http://reviews.llvm.org/D3374

llvm-svn: 207235
 		2014-04-25 17:01:00 +00:00
..
ASanStackFrameLayout.cpp [asan] fix ndebug build with strict warnings (-Wunused-variable) 2013-12-06 09:26:09 +00:00
AddDiscriminators.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
BasicBlockUtils.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
BreakCriticalEdges.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
BuildLibCalls.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
BypassSlowDivision.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
CMakeLists.txt Pass to emit DWARF path discriminators. 2014-03-03 20:06:11 +00:00
CloneFunction.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
CloneModule.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
CmpInstAnalysis.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
CodeExtractor.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
DemoteRegToStack.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
FlattenCFG.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
GlobalStatus.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
InlineFunction.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
InstructionNamer.cpp [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-05 09:10:37 +00:00
IntegerDivision.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
LCSSA.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
LLVMBuild.txt LLVMBuild: Remove trailing newline, which irked me. 2011-12-12 19:48:00 +00:00
Local.cpp This reapplies r207130 with an additional testcase+and a missing check for 2014-04-25 17:01:00 +00:00
LoopSimplify.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
LoopUnroll.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
LoopUnrollRuntime.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
LowerExpectIntrinsic.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
LowerInvoke.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
LowerSwitch.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
Makefile
…
Mem2Reg.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
MetaRenamer.cpp [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-05 09:10:37 +00:00
ModuleUtils.cpp Respect llvm.used in Internalize. 2013-07-25 03:23:25 +00:00
PromoteMemoryToRegister.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
SSAUpdater.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
SimplifyCFG.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
SimplifyIndVar.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
SimplifyInstructions.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
SimplifyLibCalls.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
SpecialCaseList.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
UnifyFunctionExitNodes.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
Utils.cpp Pass to emit DWARF path discriminators. 2014-03-03 20:06:11 +00:00
ValueMapper.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00