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2011-06-01First, do no harm -- even if we can't find a selector for an enclosingJohn McCall
landing pad, forward llvm.eh.resume calls to it instead of turning them invalidly into invokes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132382 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-29Fix this to work correctly with phis; test case to follow if this successfullyJohn McCall
fixes self-host. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132275 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-28Implement and document the llvm.eh.resume intrinsic, which isJohn McCall
transformed by the inliner into a branch to the enclosing landing pad (when inlined through an invoke). If not so optimized, it is lowered DWARF EH preparation into a call to _Unwind_Resume (or _Unwind_SjLj_Resume as appropriate). Its chief advantage is that it takes both the exception value and the selector value as arguments, meaning that there is zero effort in recovering these; however, the frontend is required to pass these down, which is not actually particularly difficult. Also document the behavior of landing pads a bit better, and make it clearer that it's okay that personality functions don't always land at landing pads. This is just a fact of life. Don't write optimizations that rely on pushing things over an unwind edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132253 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-27Fix the inliner to maintain the current de facto invoke semantics:John McCall
- the selector for the landing pad must provide all available information about the handlers, filters, and cleanups within that landing pad - calls to _Unwind_Resume must be converted to branches to the enclosing lpad so as to avoid re-entering the unwinder when the lpad claimed it was going to handle the exception in some way This is quite specific to libUnwind-based unwinding. In an effort to not interfere too badly with other unwinders, and with existing hacks in frontends, this only triggers on _Unwind_Resume (not _Unwind_Resume_or_Rethrow) and does nothing with selectors if it cannot find a selector call for either lpad. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132200 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-27One more debug line number miss in instcombine (although the code in ↵Eli Friedman
question isn't actually in instcombine). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132170 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24Clean up the lazy initialization of DIBuilder a bit.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131956 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24Make LoadAndStorePromoter preserve debug info and create llvm.dbg.values whenCameron Zwarich
promoting allocas to SSA variables. Fixes <rdar://problem/9479036>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131953 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-22Add a parameter to ConstantFoldTerminator() that callers can use to ask it ↵Frits van Bommel
to also clean up the condition of any conditional terminator it folds to be unconditional, if that turns the condition into dead code. This just means it calls RecursivelyDeleteTriviallyDeadInstructions() in strategic spots. It defaults to the old behavior. I also changed -simplifycfg, -jump-threading and -codegenprepare to use this to produce slightly better code without any extra cleanup passes (AFAICT this was the only place in -simplifycfg where now-dead conditions of replaced terminators weren't being cleaned up). The only other user of this function is -sccp, but I didn't read that thoroughly enough to figure out whether it might be holding pointers to instructions that could be deleted by this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131855 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-22Teach the inliner to emit llvm.lifetime.start/end, to scope the local variablesNick Lewycky
of the inlinee to the code representing the original function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131838 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Reapply r131605. This time with a fix, which is to use NoFolder.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131673 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19revert 131605 to fix PR9946.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131620 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Use IRBuilder.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131609 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Use IRBuilder while simplifying unreachable.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131607 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying conditional branch.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131605 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying branch.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131598 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying return instruction.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131580 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Spread use of IRBuilder even more.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131571 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying switch instruction.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131566 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying unwind.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131561 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying terminator.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131552 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while simplifying unconditional branch.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131551 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuilder while folding two entry PHINode.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131548 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Set up IRBuilder for use during simplification.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131545 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18fix typoMatt Beaumont-Gay
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131543 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Use IRBuiler while constant folding terminator.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131541 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-17Preseve line numbers while simplifying CFG.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131508 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-17Preserve line number information.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131480 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-16There is no need to force DebugLoc on a PHI at this point.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131427 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-16Preserve debug info for unused zero extended boolean argument.Devang Patel
Radar 9422775. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131422 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-14SimplifyCFG: Use ComputeMaskedBits to prune dead cases from switch instructions.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131345 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Set debug location for new PHI nodes created in exit block. Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130894 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Scanning entire basic block may be too expensive in terms of compile time. ↵Devang Patel
Instead, just use whatever location info first non-phi instruction has. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130729 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Assing line number info to new PHIs created by SSA updater.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130551 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29SimplifyCFG: Expose phi node folding cost threshold as command line parameterPeter Collingbourne
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130528 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29SimplifyCFG: Add CostRemaining parameter to DominatesMergePointPeter Collingbourne
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130527 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29SimplifyCFG: Add Trunc, ZExt and SExt to the list of cheap instructions for ↵Peter Collingbourne
phi node folding git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130526 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Remove DbgDeclare only if all uses are converted.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130431 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-23Remove unused STL header includes.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130068 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-21PR9214: Convert Metadata API to use ArrayRef.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129932 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-19Trivial simplification.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129759 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15Fix a ton of comment typos found by codespell. Patch byChris Lattner
Luis Felipe Strano Moraes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14rework FoldBranchToCommonDest to exit earlier when there is a bonusChris Lattner
instruction around, reducing work. Greatly simplify handling of debug instructions. There is no need to build up a vector of them and then move them into the one predecessor if we're processing a block. Instead just rescan the block and *copy* them into the pred. If a block gets merged into multiple preds, this will retain more debug info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129502 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11comment cleanup, use moveBefore instead of removeFromParent+insertBefore.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129319 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Don't include Operator.h from InstrTypes.h.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129271 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07Do not let debug info interfer with branch folding.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129114 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07While hoisting common code from if/else, hoist debug info intrinsics if they ↵Devang Patel
match. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129078 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07Simplify. isIdenticalToWhenDefined() checks opcode.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129041 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-06While folding branch to a common destination into a predecessor, copy dbg ↵Devang Patel
values also. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129035 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-04Attempt to fix breakage from r128782 reported by Francois Pichet onEli Friedman
llvm-commits. (Not sure why it only breaks on Windows; maybe it has something to do with the iterator representation...) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128802 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-02PR9446: RecursivelyDeleteTriviallyDeadInstructions can delete the instructionEli Friedman
after the given instruction; make sure to handle that case correctly. (It's difficult to trigger; the included testcase involves a dead block, but I don't think that's a requirement.) While I'm here, get rid of the unnecessary warning about SimplifyInstructionsInBlock, since it should work correctly as far as I know. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128782 91177308-0d34-0410-b5e6-96231b3b80d8
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