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2011-08-12Silence a bunch (but not all) "variable written but not read" warningsDuncan Sands
when building with assertions disabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137460 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-11[AVX] When joining two XMM registers into a YMM register, make sure that theNadav Rotem
lower XMM register gets in first. This will allow the SUBREG pattern to elliminate the first vector insertion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137310 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-11fix PR10605 / rdar://9930964 by adding a pretty scary missed check.Chris Lattner
It's somewhat surprising anything works without this. Before we would compile the testcase into: test: # @test movl $4, 8(%rdi) movl 8(%rdi), %eax orl %esi, %eax cmpl $32, %edx movl %eax, -4(%rsp) # 4-byte Spill je .LBB0_2 now we produce: test: # @test movl 8(%rdi), %eax movl $4, 8(%rdi) orl %esi, %eax cmpl $32, %edx movl %eax, -4(%rsp) # 4-byte Spill je .LBB0_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137303 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
2011-08-03New 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
2011-08-02Don't create a ridiculous EXTRACT_ELEMENT. PR10563.Eli Friedman
The testcase looks extremely fragile, so I'm adding an assertion which should catch any cases like this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136711 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-31Add the 'resume' instruction for the new EH rewrite.Bill Wendling
This adds the 'resume' instruction class, IR parsing, and bitcode reading and writing. The 'resume' instruction resumes propagation of an existing (in-flight) exception whose unwinding was interrupted with a 'landingpad' instruction (to be added later). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136589 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-30Revert r136253, r136263, r136269, r136313, r136325, r136326, r136329, r136338,Bill Wendling
r136339, r136341, r136369, r136387, r136392, r136396, r136429, r136430, r136444, r136445, r136446, r136253 pending review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136556 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29Do not lose branch weights when lowering SwitchInst.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136529 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29Remove unneeded const_cast.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136506 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29Misc optimizer+codegen work for 'cmpxchg' and 'atomicrmw'. They appear to beEli Friedman
working on x86 (at least for trivial testcases); other architectures will need more work so that they actually emit the appropriate instructions for orderings stricter than 'monotonic'. (As far as I can tell, the ARM, PPC, Mips, and Alpha backends need such changes.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136457 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29Use the pointer type size.Bill Wendling
With this, we can now compile a simple EH program. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136446 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29And now something that compiles...Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136445 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29Make sure to sext or trunc the result from the register.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136444 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29Rewrite the CMake build to use explicit dependencies between libraries,Chandler Carruth
specified in the same file that the library itself is created. This is more idiomatic for CMake builds, and also allows us to correctly specify dependencies that are missed due to bugs in the GenLibDeps perl script, or change from compiler to compiler. On Linux, this returns CMake to a place where it can relably rebuild several targets of LLVM. I have tried not to change the dependencies from the ones in the current auto-generated file. The only places I've really diverged are in places where I was seeing link failures, and added a dependency. The goal of this patch is not to start changing the dependencies, merely to move them into the correct location, and an explicit form that we can control and change when necessary. This also removes a serialization point in the build because we don't have to scan all the libraries before we begin building various tools. We no longer have a step of the build that regenerates a file inside the source tree. A few other associated cleanups fall out of this. This isn't really finished yet though. After talking to dgregor he urged switching to a single CMake macro to construct libraries with both sources and dependencies in the arguments. Migrating from the two macros to that style will be a follow-up patch. Also, llvm-config is still generated with GenLibDeps.pl, which means it still has slightly buggy dependencies. The internal CMake 'llvm-config-like' macro uses the correct explicitly specified dependencies however. A future patch will switch llvm-config generation (when using CMake) to be based on these deps as well. This may well break Windows. I'm getting a machine set up now to dig into any failures there. If anyone can chime in with problems they see or ideas of how to solve them for Windows, much appreciated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136433 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-28Visit the landingpad instruction.Bill Wendling
This generates the correct SDNodes for the landingpad instruction. It makes an assumption that the result of the landingpad instruction has at least two values. And that the first value is a pointer to the exception object and the second value is the "selector." git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136430 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-28Add the AddLandingPadInfo function.Bill Wendling
AddLandingPadInfo takes a landingpad instruction and grabs all of the information from it that it needs for EH table generation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136429 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-28LangRef and basic memory-representation/reading/writing for 'cmpxchg' andEli Friedman
'atomicrmw' instructions, which allow representing all the current atomic rmw intrinsics. The allowed operands for these instructions are heavily restricted at the moment; we can probably loosen it a bit, but supporting general first-class types (where it makes sense) might get a bit complicated, given how SelectionDAG works. As an initial cut, these operations do not support specifying an alignment, but it would be possible to add if we think it's useful. Specifying an alignment lower than the natural alignment would be essentially impossible to support on anything other than x86, but specifying a greater alignment would be possible. I can't think of any useful optimizations which would use that information, but maybe someone else has ideas. Optimizer/codegen support coming soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136404 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-28The personality function should be a Function* and not just a Value*.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136392 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-28CR fix: The ANY_EXTEND can be removed because the input and putput type must beNadav Rotem
identical. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136355 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-27Code generation for 'fence' instruction.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136283 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-27Merge the contents from exception-handling-rewrite to the mainline.Bill Wendling
This adds the new instructions 'landingpad' and 'resume'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136253 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-27Explicitly cast narrowing conversions inside {}s that will become errors inJeffrey Yasskin
C++0x. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136211 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-27Revert r136156, which broke several buildbots.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136206 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-26Delete unnecessarily cautious LastCALLSEQ code.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136156 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-26Add obvious missing case to switch. PR10497.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136130 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-25Initial implementation of 'fence' instruction, the new C++0x-style ↵Eli Friedman
replacement for llvm.memory.barrier. This is just a LangRef entry and reading/writing/memory representation; optimizer+codegen support coming soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136009 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-25Make sure this DAGCombine actually returns an UNDEF of the correct type; ↵Eli Friedman
PR10476. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135993 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-20PR10421: Fix a straightforward bug in the widening logic for CONCAT_VECTORS.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135595 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-19Revert r135423.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135454 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18Add APInt(numBits, ArrayRef<uint64_t> bigVal) constructor to prevent future ↵Jeffrey Yasskin
ambiguity errors like the one corrected by r135261. Migrate all LLVM callers of the old constructor to the new one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135431 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18During bottom up fast-isel, instructions emitted to materalize registers are ↵Devang Patel
at top of basic block and do not have debug location. This may misguide debugger while entering the basic block and sometimes debugger provides semi useful view of current location to developer by picking up previous known location as current location. Assign a sensible location to the first instruction in a basic block, if it does not have one location derived from source file, so that debugger can provide meaningful user experience to developers in edge cases. [take 2] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135423 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18land David Blaikie's patch to de-constify Type, with a few tweaks.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-17Minor code cleanupsNadav Rotem
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135362 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15LegalizeDAG doesn't need its own copy of this enum.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135320 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15Delete LegalizeDAG's own version of isTypeLegal and getTypeActionDan Gohman
and just use the ones from TargetLowering directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135318 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15Delete an unused variable and a redundant assert.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135311 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15Modernize comments.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135305 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-14Check register class matching instead of width of type matchingEric Christopher
when determining validity of matching constraint. Allow i1 types access to the GR8 reg class for x86. Fixes PR10352 and rdar://9777108 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135180 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-14[VECTOR-SELECT]Nadav Rotem
During type legalization we often use the SIGN_EXTEND_INREG SDNode. When this SDNode is legalized during the LegalizeVector phase, it is scalarized because non-simple types are automatically marked to be expanded. In this patch we add support for lowering SIGN_EXTEND_INREG manually. This fixes CodeGen/X86/vec_sext.ll when running with the '-promote-elements' flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135144 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-14Add assertion for the chain value typeNadav Rotem
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135143 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-14Don't emit a bit test if there is only one case the test can yield false. A ↵Benjamin Kramer
simple SETNE is sufficient. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135126 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-14Add a dag combine pattern for folding C2-(A+C1) -> (C2-C1)-AEric Christopher
Fixes rdar://9761830 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135123 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-13Convert InsertValueInst and ExtractValueInst APIs to use ArrayRef.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135040 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-08Add an intrinsic and codegen support for fused multiply-accumulate. The intentCameron Zwarich
is to use this for architectures that have a native FMA instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134742 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-08Apparently we can't expect a BinaryOperator here.Benjamin Kramer
Should fix llvm-gcc selfhost. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134699 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-08Emit a more efficient magic number multiplication for exact sdivs.Benjamin Kramer
We have to do this in DAGBuilder instead of DAGCombiner, because the exact bit is lost after building. struct foo { char x[24]; }; long bar(struct foo *a, struct foo *b) { return a-b; } is now compiled into movl 4(%esp), %eax subl 8(%esp), %eax sarl $3, %eax imull $-1431655765, %eax, %eax instead of movl 4(%esp), %eax subl 8(%esp), %eax movl $715827883, %ecx imull %ecx movl %edx, %eax shrl $31, %eax sarl $2, %edx addl %eax, %edx movl %edx, %eax git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134695 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-07Remove a FIXME. All of the standard ones are in the list.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134647 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-07Add functions 'hasPredecessor' and 'hasPredecessorHelper' to SDNode. TheLang Hames
hasPredecessorHelper function allows predecessors to be cached to speed up repeated invocations. This fixes PR10186. X.isPredecessorOf(Y) now just calls Y.hasPredecessor(X) Y.hasPredecessor(X) calls Y.hasPredecessorHelper(X, Visited, Worklist) with empty Visited and Worklist sets (i.e. no caching over invocations). Y.hasPredecessorHelper(X, Visited, Worklist) caches search state in Visited and Worklist to speed up repeated calls. The Visited set is searched for X before going to the worklist to further search the DAG if necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134592 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-06Grammar and 80-col.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134555 91177308-0d34-0410-b5e6-96231b3b80d8
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