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llvm-mirror/lib/Transforms/IPO
David Blaikie c57455683c DebugInfo+DeadArgElimination: Ensure llvm::Function*s from debug info are updated even when DAE removes both varargs and non-varargs arguments on the same function.
After some stellar (& inspired) help from Reid Kleckner providing a test
case for some rather unstable undefined behavior showing up as
assertions produced by r214761, I was able to fix this issue in DAE
involving the application of both varargs removal, followed by normal
argument removal.

Indeed I introduced this same bug into ArgumentPromotion (r212128) by
copying the code from DAE, and when I fixed the bug in ArgPromo
(r213805) and commented in that patch that I didn't need to address the
same issue in DAE because it was a single pass. Turns out it's two pass,
one for the varargs and one for the normal arguments, so the same fix is
needed (at least during varargs removal). So here it is.

(the observable/net effect of this bug, even when it didn't result in
assertion failure, is that debug info would describe the DAE'd function
in the abstract, but wouldn't provide high/low_pc, variable locations,
line table, etc (it would appear as though the function had been
entirely optimized away), see the original PR14016 for details of the
general problem)

I'm not recommitting the assertion just yet, as there's been another
regression of it since I last tried. It might just be a few test cases
weren't adequately updated after Adrian or Duncan's recent schema
changes.

llvm-svn: 219210
2014-10-07 15:10:23 +00:00
..
ArgumentPromotion.cpp DebugInfo+DeadArgElimination: Ensure llvm::Function*s from debug info are updated even when DAE removes both varargs and non-varargs arguments on the same function. 2014-10-07 15:10:23 +00:00
BarrierNoopPass.cpp [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-05 09:10:37 +00:00
CMakeLists.txt Move -verify-use-list-order into llvm-uselistorder 2014-07-25 17:13:03 +00:00
ConstantMerge.cpp Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size. 2014-08-21 05:55:13 +00:00
DeadArgumentElimination.cpp DebugInfo+DeadArgElimination: Ensure llvm::Function*s from debug info are updated even when DAE removes both varargs and non-varargs arguments on the same function. 2014-10-07 15:10:23 +00:00
ExtractGV.cpp GlobalValue: Assert symbols with local linkage have default visibility 2014-05-07 23:00:22 +00:00
FunctionAttrs.cpp [optnone] Make the optnone attribute effective at suppressing function 2014-08-13 10:49:33 +00:00
GlobalDCE.cpp GlobalDCE: Don't drop any COMDAT members 2014-10-07 07:07:19 +00:00
GlobalOpt.cpp Use range based for loops to avoid needing to re-mention SmallPtrSet size. 2014-08-24 23:23:06 +00:00
InlineAlways.cpp Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
Inliner.cpp Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
InlineSimple.cpp Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
Internalize.cpp Use range based for loops to avoid needing to re-mention SmallPtrSet size. 2014-08-24 23:23:06 +00:00
IPConstantPropagation.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
IPO.cpp Move -verify-use-list-order into llvm-uselistorder 2014-07-25 17:13:03 +00:00
LLVMBuild.txt Prune redundant dependencies in LLVMBuild.txt. 2013-12-11 00:30:57 +00:00
LoopExtractor.cpp Revert "[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges." 2014-07-21 17:06:51 +00:00
Makefile
MergeFunctions.cpp MergeFunctions: FunctionPtr has been renamed to FunctionNode. 2014-09-10 10:08:25 +00:00
PartialInlining.cpp Revert "[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges." 2014-07-21 17:06:51 +00:00
PassManagerBuilder.cpp Add control of function merging to the PMBuilder. 2014-09-13 21:46:00 +00:00
PruneEH.cpp [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
StripDeadPrototypes.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
StripSymbols.cpp Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00