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2011-05-26If llvm.dbg.value and the value instruction it refers to are far apart then ↵Devang Patel
iSel may not be able to find corresponding Node for llvm.dbg.value during DAG construction. Make iSel's life easier by removing this distance between llvm.dbg.value and its value instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132151 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-26indvars: incremental fixes for -disable-iv-rewrite and testcases.Andrew Trick
Use a proper worklist for use-def traversal without holding onto an iterator. Now that we process all IV uses, we need complete logic for resusing existing derived IV defs. See HoistStep. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132103 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-25Simplify r132022 based on Cameron's feedback.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132071 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-25indvars: fixed IV cloning in -disable-iv-rewrite mode with associatedAndrew Trick
cleanup and overdue test cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132038 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24Forgot dyn_cast check.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132025 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24Fix LoopUnswitch bug. RewriteLoopBodyWithConditionConstant can delete a deadEvan Cheng
case of a switch instruction. Back off this optimization when this would eliminate all of the predecessors to the latch. Sorry, I am unable to reduce a reasonably sized test case. rdar://9486843 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132022 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
2011-05-23When checking for signed multiplication overflow, watch out for INT_MIN and -1.Dan Gohman
This fixes PR9845. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131919 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-23Teach valuetracking that byval arguments with a specified alignment areChris Lattner
aligned. Teach memcpyopt to not give up all hope when confonted with an underaligned memcpy feeding an overaligned byval. If the *source* of the memcpy can be determined to be adequeately aligned, or if it can be forced to be, we can eliminate the memcpy. This addresses PR9794. We now compile the example into: define i32 @f(%struct.p* nocapture byval align 8 %q) nounwind ssp { entry: %call = call i32 @g(%struct.p* byval align 8 %q) nounwind ret i32 %call } in both x86-64 and x86-32 mode. We still don't get a tailcall though, because tailcalls apparently can't handle byval. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131884 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-22Fix PR9815: I was trying to get out of "generating code and thenChris Lattner
failing to form a memset, then having to delete it" but my approximation isn't safe for self recurrent loops. Instead of doign a hack, just do it the right way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131858 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
2011-05-22fix PR9841 by having GVN not process dead loads. This wasChris Lattner
causing it to get into infinite loops when it would widen a load (which can necessarily leave around dead loads). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131847 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21PR7952: Make isa<> use the same logic as cast<>, so that they both workEli Friedman
consistently. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131803 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20indvars: Prototyping Sign/ZeroExtend elimination without canonical IVs.Andrew Trick
No functionality enabled by default. Use -disable-iv-rewrite. Extended IVUsers to keep track of the phi that represents the users' IV. Added the WidenIV transform to replace a narrow IV with a wide IV by doing a one-for-one replacement of IV users instead of expanding the SCEV expressions. [sz]exts are removed and truncs are inserted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131744 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20indvars: minor cleanup in preparation for sign/zero extend elimination.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131716 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18When forming an ICmpZero LSRUse, normalize the non-IV operandDan Gohman
of the comparison, so that the resulting expression is fully normalized. This fixes PR9939. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131576 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Revert commit 131534 since it seems to have broken several buildbots.Duncan Sands
Original log entry: Refactor getActionType and getTypeToTransformTo ; place all of the 'decision' code in one place. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131536 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Refactor getActionType and getTypeToTransformTo ; place all of the 'decision'Nadav Rotem
code in one place. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131534 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-17Preserve line number information.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131482 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-17Set debug loc for new load instruction.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131481 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-16Don't do tail calls in a function that call setjmp. The stack might beRafael Espindola
corrupted when setjmp returns again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131399 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-13Convert SimplifyIVUsers into a worklist instead of a single pass overAndrew Trick
the users. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131277 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-12indvars: Added SimplifyIVUsers.Andrew Trick
Interleave IV simplifications. Currently involves EliminateComparison and EliminateRemainder. Next I'll add EliminateExtend. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131210 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Fix PR9820: a read-only call differs from a load in that a load doesn'tDuncan Sands
return the pointer being dereferenced, it returns the pointee, but a call might return the pointer itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130979 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Set debug loc for new instructions.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130895 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Preserve line number information while threading jumps.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130880 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Preserve line number info.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130876 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04preserve line number info.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130869 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04indvars: Added DisableIVRewrite and WidenIVs.Andrew Trick
This adds functionality to remove size/zero extension during indvars without generating a canonical IV and rewriting all IV users. It's disabled by default so should have no effect on codegen. Work in progress. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130829 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-03indvars: Added canExpandBackEdgeTakenCount.Andrew Trick
Only create a canonical IV for backedge taken count if it will actually be used by LinearFunctionTestReplace. And some related cleanup, preparing to reduce dependence on canonical IVs. No significant effect on x86 or arm in the test-suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130799 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-03Add an unfolded offset field to LSR's Formula record. This is used toDan Gohman
model constants which can be added to base registers via add-immediate instructions which don't require an additional register to materialize the immediate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130743 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-01enhance memcpyopt to obey -fno-builtin and friends. This addresses aChris Lattner
problem reported on cfe-dev. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130661 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Preserve line number information.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130536 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Preserve line number information.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130450 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28improve comment.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130426 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Do not lose line number info while eliminating tail call.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130419 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28final step needed to resolve PR6627, which allows us to flatten the code down toChris Lattner
a nice and tidy: %x1 = load i32* %0, align 4 %1 = icmp eq i32 %x1, 1179403647 br i1 %1, label %if.then, label %if.end instead of doing lots of loads and branches. May the FreeBSD bootloader long fit in its allocated space. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130416 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28code cleanups only.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130414 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Reapply r130340: Fix for PR9730.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130408 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28centralize "marking for deletion" into a helper function. Pass GVN around to Chris Lattner
static functions instead of passing around tons of random ivars. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130403 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Promote toErase to be an ivar of the GVN class.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130401 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28teach GVN to widen integer loads when they are overaligned, when doing an Chris Lattner
wider load would allow elimination of subsequent loads, and when the wider load is still a native integer type. This eliminates a ton of loads on various benchmarks involving struct fields, though it is somewhat hobbled by clang not being very aggressive about field alignment. This is yet another step along the way towards resolving PR6627. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130390 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Reverting r130340 in the unlikely event that it's responsible for a llvm-gcc ↵Andrew Trick
stage2 compiler error. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130350 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27Fixes PR9730: indvars: An asserting value handle still pointed to this valueAndrew Trick
Modified LinearFunctionTestReplace to push the condition on the dead list instead of eagerly deleting it. This can cause unnecessary IV rewrites, which should have no effect on codegen and will not be an issue once we stop generating canonical IVs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130340 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27Simplify cfg inserts a call to trap when unreachable code is detected. ↵Devang Patel
Assign DebugLoc to this new trap instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130315 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-26Improve the bail-out predicate to really only kick in when phiChris Lattner
translation fails. We were bailing out in some cases that would cause us to miss GVN'ing some non-local cases away. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130206 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-26Enhance MemDep: When alias analysis returns a partial alias result,Chris Lattner
return it as a clobber. This allows GVN to do smart things. Enhance GVN to be smart about the case when a small load is clobbered by a larger overlapping load. In this case, forward the value. This allows us to compile stuff like this: int test(void *P) { int tmp = *(unsigned int*)P; return tmp+*((unsigned char*)P+1); } into: _test: ## @test movl (%rdi), %ecx movzbl %ch, %eax addl %ecx, %eax ret which has one load. We already handled the case where the smaller load was from a must-aliased base pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130180 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
2011-04-20Fix another case of <rdar://problem/9184212> that only occurs with codeCameron Zwarich
generated by llvm-gcc, since llvm-gcc uses 2 i64s for passing a 4 x float vector on ARM rather than an i64 array like Clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129878 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-09-25 03:14:57 +0000