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path: root/lib/Transforms/Scalar/CodeGenPrepare.cpp
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2011-03-24--- Merging r128212 into '.':Bill Wendling
U lib/Transforms/Scalar/CodeGenPrepare.cpp --- Merging r128217 into '.': G lib/Transforms/Scalar/CodeGenPrepare.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_29@128223 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24--- Merging r127981 into '.':Bill Wendling
U include/llvm/Target/TargetLowering.h U lib/Target/X86/X86ISelLowering.cpp U lib/Target/X86/X86ISelLowering.h U lib/Target/ARM/ARMISelLowering.h U lib/Target/ARM/ARMISelLowering.cpp U lib/Transforms/Scalar/CodeGenPrepare.cpp --- Merging r128194 into '.': G lib/Transforms/Scalar/CodeGenPrepare.cpp --- Merging r128196 into '.': G lib/Transforms/Scalar/CodeGenPrepare.cpp --- Merging r128197 into '.': A test/CodeGen/X86/tailcall-returndup-void.ll G lib/Transforms/Scalar/CodeGenPrepare.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_29@128200 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-05Fix PR9398 - 10% of llc compile time is spent in Value::getNumUses. This reducesCameron Zwarich
the percentage of time spent in CodeGenPrepare when llcing 403.gcc from 12.6% to 1.8% of total llc time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127069 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-02Remove some more unused code that I missed.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126826 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-02Eliminate the unused CodeGenPrepare option to split critical edges.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126825 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-01Stop computing the number of uses twice per value in CodeGenPrepare's sinking ofCameron Zwarich
addressing code. On 403.gcc this almost halves CodeGenPrepare time and reduces total llc time by 9.5%. Unfortunately, getNumUses() is still the hottest function in llc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126782 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-18fix rdar://8878965, a regression I introduced with the recentChris Lattner
llvm.objectsize changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123771 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15temporarily revert r123526. While working on a follow-on patch IChris Lattner
realize that ConstantFoldTerminator doesn't preserve dominfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123527 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15fix rdar://8785296 - -fcatch-undefined-behavior generates inefficient codeChris Lattner
The basic issue is that isel (very reasonably!) expects conditional branches to be folded, so CGP leaving around a bunch dead computation feeding conditional branches isn't such a good idea. Just fold branches on constants into unconditional branches. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123526 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15simplify code, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123525 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15Now that instruction optzns can update the iterator as they go, we can Chris Lattner
have objectsize folding recursively simplify away their result when it folds. It is important to catch this here, because otherwise we won't eliminate the cross-block values at isel and other times. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123524 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15make the current instruction iterator an ivar, allowing xforms thatChris Lattner
potentially invalidate it (like inline asm lowering) to be sunk into their proper place, cleaning up a ton of code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123523 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08Make more passes preserve dominators (or state that they preserve dominators ifCameron Zwarich
they all ready do). This removes two dominator recomputations prior to isel, which is a 1% improvement in total llc time for 403.gcc. The only potentially suspect thing is making GCStrategy recompute dominators if it used a custom lowering strategy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123064 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-06Add the CallInst optimizations that don't involve expanding inline assembly toCameron Zwarich
OptimizeInst() so that they can be used on a worklist instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122945 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-06Move the GEP handling in CodeGenPrepare to OptimizeInst().Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122944 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-06Split the optimizations in CodeGenPrepare that don't manipulate the iteratorsCameron Zwarich
into a separate function, so that it can be called from a loop using a worklist rather than a loop traversing a whole basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122943 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-06Stop reallocating SunkAddrs for each basic block. When we move to an instructionCameron Zwarich
worklist, the key will need to become std::pair<BasicBlock*, Value*>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122932 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-05Add some more statistics to CodeGenPrepare.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122891 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-05Add some stats to CodeGenPrepare to make it easier to speed it up withoutCameron Zwarich
regressing code quality. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122887 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-04Avoid finding loop back edges when we are not splitting critical edges inCameron Zwarich
CodeGenPrepare (which is the default behavior). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122801 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03Switch a worklist in CodeGenPrepare to SmallVector and increase the inlineCameron Zwarich
capacity on the Visited SmallPtrSet. On 403.gcc, this is about a 4.5% speedup of CodeGenPrepare time (which itself is 10% of time spent in the backend). This is progress towards PR8889. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122741 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-23It is possible for SimplifyCFG to cause PHI nodes to become redundant too ↵Owen Anderson
late in the optimization pipeline to be caught by instcombine, and it's not feasible to catch them in SimplifyCFG because the use-lists are in an inconsistent state at the point where it could know that it need to simplify them. Instead, have CodeGenPrepare look for trivially redundant PHIs as part of its general cleanup effort. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122516 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-19revert r122164, I'm going to go with a different approach.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122168 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-19first step to fixing PR8642: don't fold away empty basic blocksChris Lattner
which have trapping constant exprs in them due to PHI nodes. Eliminating them can cause the constant expr to be evalutated on new paths if the input edges are critical. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122164 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-27Second attempt at fixing the performance regressions introducedOwen Anderson
by my recent GVN improvement. Looking through a single layer of PHI nodes when attempting to sink GEPs, we need to iteratively look through arbitrary PHI nests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120202 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-19When folding addressing modes in CodeGenPrepare, attempt to look through PHI ↵Owen Anderson
nodes if all the operands of the PHI are equivalent. This allows CodeGenPrepare to undo unprofitable PRE transforms. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119853 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-29Inline asm multiple alternative constraints development phase 2 - improved ↵John Thompson
basic logic, added initial platform support. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117667 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19Get rid of static constructors for pass registration. Instead, every pass ↵Owen Anderson
exposes an initializeMyPassFunction(), which must be called in the pass's constructor. This function uses static dependency declarations to recursively initialize the pass's dependencies. Clients that only create passes through the createFooPass() APIs will require no changes. Clients that want to use the CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h before parsing commandline arguments. I have tested this with all standard configurations of clang and llvm-gcc on Darwin. It is possible that there are problems with the static dependencies that will only be visible with non-standard options. If you encounter any crash in pass registration/creation, please send the testcase to me directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07Now with fewer extraneous semicolons!Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115996 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-30Try again to disable critical edge splitting in CodeGenPrepare.Jakob Stoklund Olesen
The bug that broke i386 linux has been fixed in r115191. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115204 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-27Revert "Disable codegen prepare critical edge splitting. Machine instruction ↵Jakob Stoklund Olesen
passes now" This reverts revision 114633. It was breaking llvm-gcc-i386-linux-selfhost. It seems there is a downstream bug that is exposed by -cgp-critical-edge-splitting=0. When that bug is fixed, this patch can go back in. Note that the changes to tailcallfp2.ll are not reverted. They were good are required. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114859 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-23Disable codegen prepare critical edge splitting. Machine instruction passes nowEvan Cheng
break critical edges on demand. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114633 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-22When moving zext/sext to be folded with a load, ignore the issue of whetherBob Wilson
truncates are free only in the case where the extended type is legal but the load type is not. If both types are illegal, such as when they are too big, the load may not be legalized into an extended load. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114568 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-21Move a sign-extend or a zero-extend of a load to the same basic block as theBob Wilson
load when the type of the load is not legal, even if truncates are not free. The load is going to be legalized to an extending load anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114488 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-21Clarify a comment.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114487 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-16When substituting sunkaddrs into indirect arguments an asm, we wereDale Johannesen
walking the asm arguments once and stashing their Values. This is wrong because the same memory location can be in the list twice, and if the first one has a sunkaddr substituted, the stashed value for the second one will be wrong (use-after-free). PR 8154. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114104 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-13Remove unused variable.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113769 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-13Added skeleton for inline asm multiple alternative constraint support.John Thompson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113766 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-25remove some llvmcontext arguments that are now dead post-refactoring.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112104 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17Add an option to disable codegen prepare critical edge splitting. In theory, ↵Evan Cheng
PHI elimination is already doing all (most?) of the splitting needed. But machine-licm and machine-sink seem to miss some important optimizations when splitting is disabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111224 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Reapply r110396, with fixes to appease the Linux buildbot gods.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Revert r110396 to fix buildbots.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Don't use PassInfo* as a type identifier for passes. Instead, use the ↵Owen Anderson
address of the static ID member as the sole unique type identifier. Clean up APIs related to this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-21Fix batch of converting RegisterPass<> to INTIALIZE_PASS().Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-16eliminate CallInst::ArgOffsetGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108522 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-30use getArgOperand (corrected by CallInst::ArgOffset) instead of getOperandGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107273 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-25The hasMemory argument is irrelevant to how the argumentDale Johannesen
for an "i" constraint should get lowered; PR 6309. While this argument was passed around a lot, this is the only place it was used, so it goes away from a lot of other places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106893 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24use ArgOperand APIGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106707 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Revert 101465, it broke internal OpenGL testing.Eric Christopher
Probably the best way to know that all getOperand() calls have been handled is to replace that API instead of updating. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101579 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16reapply r101434Gabor Greif
with a fix for self-hosting rotate CallInst operands, i.e. move callee to the back of the operand array the motivation for this patch are laid out in my mail to llvm-commits: more efficient access to operands and callee, faster callgraph-construction, smaller compiler binary git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101465 91177308-0d34-0410-b5e6-96231b3b80d8
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