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2013-10-11Cherry-pick LLVM 187787 to prevent tail calls on x86-32 when not appropriate.Jan Voung
See: http://llvm.org/viewvc/llvm-project?view=revision&revision=187787 The newer version of newlib tickles this x86-32 bug when building the exception handling tests, which don't strip the "tail" attribute. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3702 Waiting on trybots, but it seems to have fixed the minimal reproducer I have: http://chromegw.corp.google.com/i/tryserver.nacl/builders/nacl-toolchain-linux-pnacl-x86_64/builds/922 http://chromegw.corp.google.com/i/tryserver.nacl/builders/nacl-toolchain-linux-pnacl-x86_32/builds/870 http://chromegw.corp.google.com/i/tryserver.nacl/builders/nacl-toolchain-mac-pnacl-x86_32/builds/875 R=jfb@chromium.org Review URL: https://codereview.chromium.org/26538008
2013-10-11Apply upstream: Add missing ATOMIC_CMP_SWAP case.Petar Jovanovic
Cherry-pick r185186 from upstream. Original commit message: Author: Lang Hames <lhames@gmail.com> Date: Fri Jun 28 18:36:42 2013 +0000 Add missing case to switch statement - DAGTypeLegalizer::ExpandIntegerResult should expand ATOMIC_CMP_SWAP nodes the same way that it does for ATOMIC_SWAP. Since ATOMIC_LOADs on some targets (e.g. older ARM variants) get legalized to ATOMIC_CMP_SWAPs, the missing case had been causing i64 atomic loads to crash during isel. This has to be cherry-picked, as we have experienced the same bug described in the original message. Missing case caused MIPS 64 atomics to crash. TBR= mseaborn@chromium.org, dschuff@chromium.org BUG= crash for MIPS atomics Review URL: https://codereview.chromium.org/26958002
2013-08-30Revert some ARM byval localmods since byval+varargs are not in stable pexes.Jan Voung
Localmods came from: https://codereview.chromium.org/10825082/, and earlier. (1) The original change was so that byval parameters always go on the stack. That part was added because the original ARM code was buggy, and did not actually make a copy of the value, modifying the caller's struct (ouch!). (2) Then came a localmod to make all arguments following a byval go on the stack and to make the var-args code aware of that. This is so that arguments stay in the correct order for var-args to pick up. For (1) there has been some work upstream to make it work better. In any case, clang with --target=armv7a-...-gnueabi only used byval in some limited cases -- when the size of the struct is > 64 bytes where the backend will know that part of it could be in regs, and the rest can be memcpy'ed to the stack. For le32, clang will still generate byval without satisfying the same ARM condition (only for structs bigger than 64 bytes), so it could be *very bad* if we didn't have the ABI simpification passes rewrite the byval and try to let the ARM backend do things with byval... TEST=the GCC torture tests: va-arg-4.c, and 20030914-2.c and the example in issue 2746 still pass. BUG=none, cleanup R=dschuff@chromium.org Review URL: https://codereview.chromium.org/23691009
2013-07-15Merge commit '7dfcb84fc16b3bf6b2379713b53090757f0a45f9'Eli Bendersky
Conflicts: docs/LangRef.rst include/llvm/CodeGen/CallingConvLower.h include/llvm/IRReader/IRReader.h include/llvm/Target/TargetMachine.h lib/CodeGen/CallingConvLower.cpp lib/IRReader/IRReader.cpp lib/IRReader/LLVMBuild.txt lib/IRReader/Makefile lib/LLVMBuild.txt lib/Makefile lib/Support/MemoryBuffer.cpp lib/Support/Unix/PathV2.inc lib/Target/ARM/ARMBaseInstrInfo.cpp lib/Target/ARM/ARMISelLowering.cpp lib/Target/ARM/ARMInstrInfo.td lib/Target/ARM/ARMSubtarget.cpp lib/Target/ARM/ARMTargetMachine.cpp lib/Target/Mips/CMakeLists.txt lib/Target/Mips/MipsDelaySlotFiller.cpp lib/Target/Mips/MipsISelLowering.cpp lib/Target/Mips/MipsInstrInfo.td lib/Target/Mips/MipsSubtarget.cpp lib/Target/Mips/MipsSubtarget.h lib/Target/X86/X86FastISel.cpp lib/Target/X86/X86ISelDAGToDAG.cpp lib/Target/X86/X86ISelLowering.cpp lib/Target/X86/X86InstrControl.td lib/Target/X86/X86InstrFormats.td lib/Transforms/IPO/ExtractGV.cpp lib/Transforms/InstCombine/InstCombineCompares.cpp lib/Transforms/Utils/SimplifyLibCalls.cpp test/CodeGen/X86/fast-isel-divrem.ll test/MC/ARM/data-in-code.ll tools/Makefile tools/llvm-extract/llvm-extract.cpp tools/llvm-link/CMakeLists.txt tools/opt/CMakeLists.txt tools/opt/LLVMBuild.txt tools/opt/Makefile tools/opt/opt.cpp
2013-06-28Revert the IntrinsicLowering logic that preserves externals for intrinsics.Eli Bendersky
This is no longer required, following our recent PNaCl ABI cleanups. BUG=None R=jvoung@chromium.org Review URL: https://codereview.chromium.org/18031017
2013-06-28Do not preserve abort() - it's not needed for ARM and X86.Eli Bendersky
In a subsequent CL I'll clean up the whole IntrinsicLowering logic - probably reverting it to upstream since we no longer really use it. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3526 R=mseaborn@chromium.org Review URL: https://codereview.chromium.org/18053017
2013-06-27Do not preserve "pow" for the sake of re-materializing intrinsics.Eli Bendersky
This is no longer required, since Clang will not generate llvm.pow.* intrinsics. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3513 R=mseaborn@chromium.org Review URL: https://codereview.chromium.org/18162002
2013-06-25Support for mem* library functions in stable bitcode via intrinsics.Eli Bendersky
* Don't preserve external linking for mem{cpy,move,cmp} during LTO. * In the RewritePNaClLibraryCalls pass - add rewriting of mem* calls to appropriate intrinsics, similarly to the way it was done for longjmp. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3493 R=mseaborn@chromium.org Review URL: https://codereview.chromium.org/17622003
2013-06-13Fix PrologEpilogInserter to save and restore all callee saved registersDerek Schuff
if the function calls _builtin_unwind_init() Also fix the list of callee-saved registers returned by X86RegisterInfo::getCalleeSavedRegisters BUG= https://code.google.com/p/nativeclient/issues/detail?id=3486 R=mseaborn@chromium.org Review URL: https://codereview.chromium.org/16987002
2013-06-12Take some of the LLVM LibM intrinsics out of the "must be external" list.Jan Voung
Intrinsic::sin, Intrinsic::cos, etc., aren't generated. Intrinsic::sqrt is implemented in hardware we support now. If future hardware does not support it, we can supply a library function in the runtime. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3339 TEST=scons, llvm test suite, gcc torture, spec2k R=eliben@chromium.org Review URL: https://codereview.chromium.org/16868002
2013-05-28Add two passes that implement conversions from PNaCl's specific intrinsicsEli Bendersky
to external function calls during the translation stage (llc). One of the passes is a ModulePass that adds the appropriate function declarations to the module. The other is a FunctionPass that performs the actual call replacement. This split exists because of bitcode streaming. Initially the passes handle the llvm.nacl.{set|long}jmp intrinsics. In the future they may handle additional intrinsics that are part of the PNaCl stable bitcode ABI. This CL also removes the previous approach to handling this conversion (in SelectionDAGBuilder.cpp). That ended up not working - more details in issue 3429. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3429 R=mseaborn@chromium.org Review URL: https://codereview.chromium.org/16047002
2013-05-21Merging r182387:Bill Wendling
------------------------------------------------------------------------ r182387 | jholewinski | 2013-05-21 07:37:16 -0700 (Tue, 21 May 2013) | 7 lines Drop @llvm.annotation and @llvm.ptr.annotation intrinsics during codegen. The intrinsic calls are dropped, but the annotated value is propagated. Fixes PR 15253 Original patch by Zeng Bin! ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@182417 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-21Merging r182344:Bill Wendling
------------------------------------------------------------------------ r182344 | mren | 2013-05-20 17:57:22 -0700 (Mon, 20 May 2013) | 7 lines Dwarf: use a single line table to generate assembly when .loc is used. This is to fix PR15408 where an undefined symbol Lline_table_start1 is used. Since we do not generate the debug_line section when .loc is used, Lline_table_start1 is not emitted and we can't refer to it when calculating at_stmt_list for a compile unit. ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@182346 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-17Cherry-pick r181922: Fix miscompile due to StackColoring incorrectly merging ↵Mark Seaborn
stack slots (PR15707) IR optimisation passes can result in a basic block that contains: llvm.lifetime.start(%buf) ... llvm.lifetime.end(%buf) ... llvm.lifetime.start(%buf) Before this change, calculateLiveIntervals() was ignoring the second lifetime.start() and was regarding %buf as being dead from the lifetime.end() through to the end of the basic block. This can cause StackColoring to incorrectly merge %buf with another stack slot. Fix by removing the incorrect Starts[pos].isValid() and Finishes[pos].isValid() checks. Just doing: Starts[pos] = Indexes->getMBBStartIdx(MBB); Finishes[pos] = Indexes->getMBBEndIdx(MBB); unconditionally would be enough to fix the bug, but it causes some test failures due to stack slots not being merged when they were before. So, in order to keep the existing tests passing, treat LiveIn and LiveOut separately rather than approximating the live ranges by merging LiveIn and LiveOut. This fixes PR15707. Patch by Mark Seaborn. BUG=https://code.google.com/p/nativeclient/issues/detail?id=3374 Review URL: https://codereview.chromium.org/15302009
2013-05-09Support @llvm.nacl.{set|long}jmp intrinsics by translating them to library callsEli Bendersky
This is similar to the way @llvm.{set|long}jmp are handled. The previously defined nacl-specific intrinsics are no longer used and are overridden. For the library call, call setjmp/longjmp without a preceding underscore as these symbols exist in our runtime support code (pnacl/support/setjmp_XXX.S) BUG=https://code.google.com/p/nativeclient/issues/detail?id=3429 R=mseaborn@chromium.org Review URL: https://codereview.chromium.org/14715018
2013-05-08Merging r181296:Bill Wendling
------------------------------------------------------------------------ r181296 | timurrrr | 2013-05-07 00:47:47 -0700 (Tue, 07 May 2013) | 1 line Fix the VS2010 build broken by r181271 ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@181379 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06DebugInfo: Support imported modules in lexical blocksDavid Blaikie
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181271 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06Remove unnecessary instance variable and rework logic accordingly.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181227 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06Grammar.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181226 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06Fix slightly too aggressive conact_vector optimization.Michael Kuperstein
(Would sometimes optimize away conacts used to extend a vector with undef values) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181186 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-05Teach if-converter to avoid removing BBs whose addresses are takne. ↵Evan Cheng
rdar://13782395 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181160 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-05InlineSpiller: Remove quadratic behavior.Benjamin Kramer
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181149 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-05For ARM backend, fixed "byval" attribute support.Stepan Dyatkovskiy
Now even the small structures could be passed within byval (small enough to be stored in GPRs). In regression tests next function prototypes are checked: PR15293: %artz = type { i32 } define void @foo(%artz* byval %s) define void @foo2(%artz* byval %s, i32 %p, %artz* byval %s2) foo: "s" stored in R0 foo2: "s" stored in R0, "s2" stored in R2. Next AAPCS rules are checked: 5.5 Parameters Passing, C.4 and C.5, "ParamSize" is parameter size in 32bit words: -- NSAA != 0, NCRN < R4 and NCRN+ParamSize > R4. Parameter should be sent to the stack; NCRN := R4. -- NSAA != 0, and NCRN < R4, NCRN+ParamSize < R4. Parameter stored in GPRs; NCRN += ParamSize. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181148 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-05Add ArrayRef constructor from None, and do the cleanups that this ↵Dmitri Gribenko
constructor enables Patch by Robert Wilhelm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181138 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-02TiedTo flag can now be placed on implicit operands. isTwoAddrUse() should lookEvan Cheng
at all of the operands. Previously it was skipping over implicit operands which cause infinite looping when the two-address pass try to reschedule a two-address instruction below the kill of tied operand. I'm unable to come up with a reasonably sized test case. rdar://13747577 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180906 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-01Revert r180737. The companion patch was reverted, and this is not relevant ↵Bill Wendling
right now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180889 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-01This patch breaks up Wrap.h so that it does not have to include all of Filip Pizlo
the things, and renames it to CBindingWrapping.h. I also moved CBindingWrapping.h into Support/. This new file just contains the macros for defining different wrap/unwrap methods. The calls to those macros, as well as any custom wrap/unwrap definitions (like for array of Values for example), are put into corresponding C++ headers. Doing this required some #include surgery, since some .cpp files relied on the fact that including Wrap.h implicitly caused the inclusion of a bunch of other things. This also now means that the C++ headers will include their corresponding C API headers; for example Value.h must include llvm-c/Core.h. I think this is harmless, since the C API headers contain just external function declarations and some C types, so I don't believe there should be any nasty dependency issues here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180881 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-01[inline asm] Return an undef SDValue of the expected value type, rather thanChad Rosier
report a fatal error. This allows us to continue processing the translation unit. Test case to come on the clang side because we need an inline asm diagnostics handler in place. rdar://13446483 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180873 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-01Optimize away nop CONCAT_VECTOR nodes.Nadav Rotem
Optimize CONCAT_VECTOR nodes that merge EXTRACT_SUBVECTOR values that extract from the same vector. rdar://13402653 PR15866 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180871 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30Only pass 'returned' to target-specific lowering code when the value of ↵Stephen Lin
entire register is guaranteed to be preserved. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180825 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30Temporarily revert "Change the informal convention of DBG_VALUE so that we ↵Adrian Prantl
can express a" because it breaks some buildbots. This reverts commit 180816. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180819 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30Change the informal convention of DBG_VALUE so that we can express aAdrian Prantl
register-indirect address with an offset of 0. It used to be that a DBG_VALUE is a register-indirect value if the offset (operand 1) is nonzero. The new convention is that a DBG_VALUE is register-indirect if the first operand is a register and the second operand is an immediate. For plain registers use the combination reg, reg. rdar://problem/13658587 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180816 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30MI Sched: revert a minor heuristic that snuck in with -misched-vcopy.Andrew Trick
I'll fix the heuristic in a general way in a follow-up commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180815 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30LocalStackSlotAllocation improvementsHal Finkel
First, taking advantage of the fact that the virtual base registers are allocated in order of the local frame offsets, remove the quadratic register-searching behavior. Because of the ordering, we only need to check the last virtual base register created. Second, store the frame index in the FrameRef structure, and get the frame index and the local offset from this structure at the top of the loop iteration. This allows us to de-nest the loops in insertFrameReferenceRegisters (and I think makes the code cleaner). I also moved the needsFrameBaseReg check into the first loop over instructions so that we don't bother pushing FrameRefs for instructions that don't want a virtual base register anyway. Lastly, and this is the only functionality change, avoid the creation of single-use virtual base registers. These are currently not useful because, in general, they end up replacing what would be one r+r instruction with an add and a r+i instruction. Committing this removes the XFAIL in CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll Jim has okayed this off-list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180799 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-29Emit the TLS initialization function pointers into the correct section.Bill Wendling
The `llvm.tls_init_funcs' (created by the front-end) holds pointers to the TLS initialization functions. These need to be placed into the correct section so that they are run before `main()'. <rdar://problem/13733006> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180737 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-27Generalize the MachineTraceMetrics public API.Andrew Trick
Naturally, we should be able to pass in extra instructions, not just extra blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180667 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-27Use the target triple from the target machine rather than the moduleEric Christopher
to determine whether or not we're on a darwin platform for debug code emitting. Solves the problem of a module with no triple on the command line and no triple in the module using non-gdb ok features on darwin. Fix up the member-pointers test to check the correct things for cross platform (DW_FORM_flag is a good prefix). Unfortunately no testcase because I have no ideas how to test something without a triple and without a triple in the module yet check precisely on two platforms. Ideas welcome. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180660 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-26Cleanup and document MachineLocation.Adrian Prantl
Clarify documentation and API to make the difference between register and register-indirect addressed locations more explicit. Put in a comment to point out that with the current implementation we cannot specify a register-indirect location with offset 0 (a breg 0 in DWARF). No functionality change intended. rdar://problem/13658587 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180641 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-26Micro-optimizationBill Wendling
TLVs probably won't be as common as the other types of variables. Check for them last before defaulting to "DATA". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180631 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-26Re-write the address propagation code for pre-indexed loads/stores to take ↵Silviu Baranga
into account some previously misssed cases (PRE_DEC addressing mode, the offset and base address are swapped, etc). This should fix PR15581. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180609 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-26DAGCombiner: Canonicalize vector integer abs in the same way we do it for ↵Benjamin Kramer
scalars. This already helps SSE2 x86 a lot because it lacks an efficient way to represent a vector select. The long term goal is to enable the backend to match a canonicalized pattern into a single instruction (e.g. vabs or pabs). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180597 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-25[mc-coff] Forward Linker Option flags into the .drectve sectionReid Kleckner
Summary: This is modelled on the Mach-O linker options implementation and should support a Clang implementation of #pragma comment(lib/linker). Reviewers: rafael CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D724 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180569 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-25Fix constant folding for one lane vector types. Constant folding one lane ↵Silviu Baranga
vector types not returns a vector instead of a scalar. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180254 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-24Fix for r180193 - MI Sched: eliminate local vreg.Andrew Trick
Fixes PR15838. Need to check for blocks with nothing but dbg.value. I'm not sure how to force this situation with a unit test. I tried to reduce the test case in PR15838 (1k lines of metadata) but gave up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180227 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-24[inline asm] Fix a crasher for an invalid value type/register class.Chad Rosier
rdar://13731657 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180226 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-24MI Sched: eliminate local vreg copies.Andrew Trick
For now, we just reschedule instructions that use the copied vregs and let regalloc elliminate it. I would really like to eliminate the copies on-the-fly during scheduling, but we need a complete implementation of repairIntervalsInRange() first. The general strategy is for the register coalescer to eliminate as many global copies as possible and shrink live ranges to be extended-basic-block local. The coalescer should not have to worry about resolving local copies (e.g. it shouldn't attemp to reorder instructions). The scheduler is a much better place to deal with local interference. The coalescer side of this equation needs work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180193 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-24Register Coalescing: add a flag to disable rescheduling.Andrew Trick
When MachineScheduler is enabled, this functionality can be removed. Until then, provide a way to disable it for test cases and designing MachineScheduler heuristics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180192 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-24MI Sched: regpressure tracing.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180191 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-24Formatting.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180186 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-23DAGCombine should not aggressively fold SEXT(VSETCC(...)) into a wider ↵Owen Anderson
VSETCC without first checking the target's vector boolean contents. This exposed an issue with PowerPC AltiVec where it appears it was setting the wrong vector boolean contents. The included change fixes the PowerPC tests, and was OK'd by Hal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180129 91177308-0d34-0410-b5e6-96231b3b80d8
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