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2011-08-04Reword.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136866 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-04Fix what seems an obvious typo. Patch by Ivan Krasin. ProblemDuncan Sands
reported at http://habrahabr.ru/blogs/compilers/125626/. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136865 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-04Reverting r136884 updateUnloop, which crashed a linux builder.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136857 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-04Fix http://llvm.org/bugs/show_bug.cgi?id=10568Jason W Kim
Move the reloc size assert into AsmBackend - where it is more apropos. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136855 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-04Only access both operands of an INSERT_SUBVECTOR if it is an INSERT_SUBVECTOR.Bill Wendling
Fixes PR10527. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136853 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03ARM refactoring assembly parsing of memory address operands.Jim Grosbach
Memory operand parsing is a bit haphazzard at the moment, in no small part due to the even more haphazzard representations of memory operands in the .td files. Start cleaning that all up, at least a bit. The addressing modes in the .td files will be being simplified to not be so monolithic, especially with regards to immediate vs. register offsets and post-indexed addressing. addrmode3 is on its way with this patch, for example. This patch is foundational to enable going back to smaller incremental patches for the individual memory referencing instructions themselves. It does just enough to get the basics in place and handle the "make check" regression tests we already have. Follow-up work will be fleshing out the details and adding more robust test cases for the individual instructions, starting with ARM mode and moving from there into Thumb and Thumb2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136845 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03An algorithm for incrementally updating LoopInfo within aAndrew Trick
LoopPassManager. The incremental update should be extremely cheap in most cases and can be used in places where it's not feasible to regenerate the entire loop forest. - "Unloop" is a node in the loop tree whose last backedge has been removed. - Perform reverse dataflow on the block inside Unloop to propagate the nearest loop from the block's successors. - For reducible CFG, each block in unloop is visited exactly once. This is because unloop no longer has a backedge and blocks within subloops don't change parents. - Immediate subloops are summarized by the nearest loop reachable from their exits or exits within nested subloops. - At completion the unloop blocks each have a new parent loop, and each immediate subloop has a new parent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136844 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03whitespaceAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136843 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Correctly handle multiple DBG_VALUE instructions at the same SlotIndex.Jakob Stoklund Olesen
It is possible to have multiple DBG_VALUEs for the same variable: 32L TEST32rr %vreg0<kill>, %vreg0, %EFLAGS<imp-def>; GR32:%vreg0 DBG_VALUE 2, 0, !"i" DBG_VALUE %noreg, %0, !"i" When that happens, keep the last one instead of the first. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136842 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03whitespaceAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136840 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03An interface for iterating over a loop's blocks in DFS order.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136838 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Fix broken encoding of tCBNZ.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136837 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Enable compact region splitting by default.Jakob Stoklund Olesen
This helps generate better code in functions with high register pressure. The previous version of compact region splitting caused regressions because the regions were a bit too large. A stronger negative bias applied in r136832 fixed this problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136836 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Do not drop undef debug values. These are used as range termination marker ↵Devang Patel
by live debug variable pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136834 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Remove underscore that's breaking linux buildbots.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136833 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Be more conservative when forming compact regions.Jakob Stoklund Olesen
Apply twice the negative bias on transparent blocks when computing the compact regions. This excludes loop backedges from the region when only one of the loop blocks uses the register. Previously, we would include the backedge in the region if the loop preheader and the loop latch both used the register, but the loop header didn't. When both the header and latch blocks use the register, we still keep it live on the backedge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136832 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Fix some warnings from Clang in release builds:Chandler Carruth
lib/CodeGen/RegAllocGreedy.cpp:1176:18: warning: unused variable 'B' [-Wunused-variable] if (unsigned B = Cand.getBundles(BundleCand, BestCand)) { ^ lib/CodeGen/RegAllocGreedy.cpp:1188:18: warning: unused variable 'B' [-Wunused-variable] if (unsigned B = Cand.getBundles(BundleCand, 0)) { ^ git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136831 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Fix typo in #include which revealed in the case-sensitive filesystem.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136828 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Use MachineBranchProbabilityInfo in If-Conversion instead of its own heuristics.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136826 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Remove the LowerSetJmp pass. It wasn't used effectively by any of the targets.Bill Wendling
This is some of my original LLVM code. *wipes tear* git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136821 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Add accessors for manipulating an MCInst's operands.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136818 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Add more constantness in BlockFrequencyInfo.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136816 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Kill the export list as well.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136814 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03New approach to r136737: insert the necessary fences for atomic ops in ↵Eli Friedman
platform-independent code, since a bunch of platforms (ARM, Mips, PPC, Alpha are the relevant targets here) need to do essentially the same thing. I think this completes the basic CodeGen for atomicrmw and cmpxchg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136813 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Remove CreateUnwind from the IRBuillder.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136811 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Remove unused variables.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136803 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Some revisions to Devang's change r136759 for merged global debug info.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136802 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Go back to the old definition. It's not clear that a 'resume' can be ↵Bill Wendling
'outlined' from the function with the landing pad for all platforms. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136799 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03SCEV: Use AssertingVH to catch dangling BasicBlock* when passes forgetAndrew Trick
to notify SCEV of a change. Add forgetLoop in a couple of those places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136797 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03whitespaceAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136795 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Explain how clauses are applied.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136790 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Handle IMPLICIT_DEF instructions in X86FloatingPoint.Jakob Stoklund Olesen
This fixes PR10575. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136787 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Use cast<> instead of a C-style cast to get some free assertions.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136771 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03fix PR10286, a problem with the .ll printer handling block addresses that ↵Chris Lattner
are out-of-scope. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136768 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Use byte offset, instead of element number, to access merged global.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136759 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Small cleanups:Nick Lewycky
- use SmallVectorImpl& for the function argument. - ignore the operands on the GEP, even if they aren't constant! Much as we pretend the malloc succeeds, we pretend that malloc + whatever-you-GEP'd-by is not null. It's magic! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136757 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Add this back in for now. There are still a few passes which create unwind ↵Bill Wendling
instructions at the moment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136756 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Fix logical error when detecting lifetime intrinsics.Nick Lewycky
Don't replace a gep/bitcast with 'undef' because that will form a "free(undef)" which in turn means "unreachable". What we wanted was a no-op. Instead, analyze the whole tree and look for all the instructions we need to delete first, then delete them second, not relying on the use_list to stay consistent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136752 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-03Replace the 'UnwindInst' check with a check for 'ResumeInst', which also exitsBill Wendling
the function, because the UnwindInst is going away. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136751 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Use the precomputed def presence in RAGreedy::calcSpillCost.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136742 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Inform SpillPlacement about blocks with defs.Jakob Stoklund Olesen
This information is not used for anything yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136741 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Rename {First,Last}Use to {First,Last}Instr.Jakob Stoklund Olesen
With a 'FirstDef' field right there, it is very confusing that FirstUse refers to an instruction that may be a def. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136739 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02lldb doesn't need the edis dylib any more.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136738 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02ARM backend support for atomicrmw and cmpxchg with non-monotonic ordering. ↵Eli Friedman
Not especially pretty, but seems to work well enough. If this looks okay, I'll put together similar patches for Mips, PPC, and Alpha. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136737 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Add a BlockInfo::FirstDef field.Jakob Stoklund Olesen
This is either an invalid SlotIndex, or valno->def for the first value defined inside the block. PHI values are not counted as defined inside the block. The FirstDef field will be used when estimating the cost of spilling around a block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136736 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Delete BlockInfo::LiveThrough. It wasn't used any more.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136735 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Teach InstCombine that lifetime intrincs aren't a real user on the result of aNick Lewycky
malloc call. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136732 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Extend the SpillPlacement interface with two new features.Jakob Stoklund Olesen
The PrefBoth constraint is used for blocks that ideally want a live-in value both on the stack and in a register. This would be used by a block that has a use before interference forces a spill. Secondly, add the ChangesValue flag to BlockConstraint. This tells SpillPlacement if a live-in value on the stack can be reused as a live-out stack value for free. If the block redefines the virtual register, a spill would be required for that. This extra information will be used by SpillPlacement to more accurately calculate spill costs when a value can exist both on the stack and in a register. The simplest example is a basic block that reads the virtual register, but doesn't change its value. Spilling around such a block requires a reload, but no spill in the block. The spiller already knows this, but the spill placer doesn't. That can sometimes lead to suboptimal regions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136731 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Add the documentation for the 'landingpad' instruction. Improve the 'invoke'Bill Wendling
instruction's documentation to reference the landingpad and resume instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136729 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-02Move methods in PassManagerBuilder offline.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136727 91177308-0d34-0410-b5e6-96231b3b80d8
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