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2005-09-27Avoid spilling stack slots... to stack slots.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23478 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-27Completely rewrite 'correct' eh support. This changes how setjmp insertionChris Lattner
is performed so it is only at most once per function that contains an invoke instead of once per invoke in the function. This patch has the following perks: 1. It fixes PR631, which complains about slowness. 2. If fixes PR240, which complains about non-volatile vars being live across setjmp/longjmps. 3. It improves (but does not fix) the jmpbuf alignment issue on itanium by not forcing the jmpbufs to always be 8-bytes off the alignment of the structure. 4. It speeds up 253.perlbmk from 338s to 13.70s (a 25x improvement!), making us now about 4% faster than GCC. Further improvements are also possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23477 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-27allow demotion to volatile values, add support for invokeChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23473 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-26Move the ConstantFoldLoadThroughGEPConstantExpr function out of the InstCombineChris Lattner
pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23444 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-23remove some debugging codeChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23411 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-23Fold two consequtive branches that share a common destination between them.Chris Lattner
This implements SimplifyCFG/branch-fold.ll, and is useful on ?:/min/max heavy code git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23410 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-23simplify some logic furtherChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23408 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-23pull a bunch of logic out of SimplifyCFG into a helper fnChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23407 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-20Start threading across blocks with code in them, so long as the code doesChris Lattner
not define a value that is used outside of it's block. This catches many more simplifications, e.g. 854 in 176.gcc, 137 in vpr, etc. This implements branch-phi-thread.ll:test3.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23397 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-20Implement merging of blocks with the same condition if the block has multipleChris Lattner
predecessors. This implements branch-phi-thread.ll::test1 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23395 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19Reject a case we don't handle yetChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23393 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19remove debugging code :-/Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23392 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19Implement SimplifyCFG/branch-phi-thread.ll, the most trivial case of threadingChris Lattner
control across branches with determined outcomes. More generality to follow. This triggers a couple thousand times in specint. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23391 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-13Teach SplitCriticalEdge to update LoopInfo if it is alive. This fixesChris Lattner
a problem in LoopStrengthReduction, where it would split critical edges then confused itself with outdated loop information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22776 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-13remove dead code. The exit block list is computed on demand, thus does notChris Lattner
need to be updated. This code is a relic from when it did. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22775 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-12Change break critical edges to not remove, then insert, PHI node entries.Chris Lattner
Instead, just update the BB in-place. This is both faster, and it prevents split-critical-edges from shuffling the PHI argument list unneccesarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22765 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-10remove some trickiness that broke yacr2 and some other programs last nightChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22751 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-10Make loop-simplify produce better loops by turning PHI nodes like X = phi [X, Y]Chris Lattner
into just Y. This often occurs when it seperates loops that have collapsed loop headers. This implements LoopSimplify/phi-node-simplify.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22746 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-05This code can handle non-dominating instructionsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22667 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-04Fix a fixme in CondPropagate.cpp by moving a PhiNode optimization intoNate Begeman
BasicBlock's removePredecessor routine. This requires shuffling around the definition and implementation of hasContantValue from Utils.h,cpp into Instructions.h,cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22664 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03The correct fix for PR612, which also fixesChris Lattner
Transforms/LowerInvoke/2005-08-03-InvokeWithPHIUse.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22628 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03When inserting code, make sure not to insert it before PHI nodes. ThisChris Lattner
fixes PR612 and Transforms/LowerInvoke/2005-08-03-InvokeWithPHI.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22626 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03Fix Transforms/SimplifyCFG/2005-08-03-PHIFactorCrash.ll, a problem thatChris Lattner
occurred while bugpointing another testcase git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22621 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03Finally, add the required constraint checks to fix ↵Chris Lattner
Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll the right way git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22615 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03Simplify some code, add the correct pred checksChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22613 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03Refactor code out of PropagatePredecessorsForPHIs, turning it into a pure ↵Chris Lattner
function with no side-effects git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22612 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03use splice instead of remove/insert to avoid some symtab operationsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22611 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03move two functions up in the file, use SafeToMergeTerminators to eliminateChris Lattner
some duplicated code git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22610 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03Rip some code out of the main SimplifyCFG function into a subfunction andChris Lattner
call it from the only place it is live. No functionality changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22609 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02Disable this patch:Chris Lattner
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050801/027345.html This breaks real programs and only fixes an obscure regression testcase. A real fix is in development. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22606 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02Change a place to use an arbitrary value instead of null, when possibleChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22605 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02This code was very close, but not quite right. It did not take intoChris Lattner
consideration the case where a reference in an unreachable block could occur. This fixes Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll, something I ran into while bugpoint'ing another pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22584 91177308-0d34-0410-b5e6-96231b3b80d8
2005-07-27Eliminate all remaining tabs and trailing spaces.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22523 91177308-0d34-0410-b5e6-96231b3b80d8
2005-06-30Fix PR590 and Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll.Chris Lattner
The optimization for locally used allocas was not safe for allocas that were read before they were written. This change disables that optimization in that case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22318 91177308-0d34-0410-b5e6-96231b3b80d8
2005-06-19prevent DCE of vaarg intrinsics. This should take care of most regressionsAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22263 91177308-0d34-0410-b5e6-96231b3b80d8
2005-06-17Don't crash on: X = phi (X, X).Chris Lattner
This fixes PR584 and Transforms/SimplifyCFG/2005-06-16-PHICrash.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22232 91177308-0d34-0410-b5e6-96231b3b80d8
2005-06-09Fix a 64-bit problem, passing (int)0 through ... instead of (void*)0Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22206 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-20Fix Transforms/SimplifyCFG/switch-simplify-crash.llChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22158 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-14Make sure to preserve the calling convention when changing an invoke intoChris Lattner
a call. This fixes Prolangs-C++/deriv2, kimwitu++, and Misc-C++/bigfib on X86 with -enable-x86-fastcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22023 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13When lowering invokes to calls, amke sure to preserve the calling conv. ThisChris Lattner
fixes Ptrdist/anagram with x86 llcbeta git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21925 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13Prefer int 0 instead of long 0 for GEP arguments.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21924 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-09wrap long lines, preserve calling conventions when cloning functions andChris Lattner
turning calls into invokes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21797 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-06BAD typeo which caused many testsuite failures last night. Note to self, doChris Lattner
not change code after testing it without retesting! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21741 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-06Preserve tail markerChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21737 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-06Implement Transforms/Inline/inline-tail.llChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21736 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-06DCE intrinsic instructions without side effects.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21719 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-02Fixed a comment.John Criswell
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21653 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-29Remove optimizations that don't require both operands to be constant. TheseReid Spencer
are moved to simplify-libcalls pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21614 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-28* Add constant folding for additional floating point library calls such asReid Spencer
sinh, cosh, etc. * Make the name comparisons for the fp libcalls a little more efficient by switching on the first character of the name before doing comparisons. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21611 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-23Eliminate tabs and trailing spacesJeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21480 91177308-0d34-0410-b5e6-96231b3b80d8
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