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* Accept instructions that read undefined values.Jakob Stoklund Olesen2011-03-181-1/+9
| | | | | | | This is not supposed to happen, but I have seen the x86 rematter getting confused when rematerializing partial redefs. llvm-svn: 127857
* Be more accurate about the slot index reading a register when dealing with defsJakob Stoklund Olesen2011-03-181-4/+20
| | | | | | | | and early clobbers. Assert when trying to find an undefined value. llvm-svn: 127856
* Check RequiresNullTerminator first, or we might read from an invalid address.Rafael Espindola2011-03-181-1/+1
| | | | llvm-svn: 127853
* Add a target-specific branchless method for double-width relationalEli Friedman2011-03-181-4/+73
| | | | | | | | | | | comparisons on x86. Essentially, the way this works is that SUB+SBB sets the relevant flags the same way a double-width CMP would. This is a substantial improvement over the generic lowering in LLVM. The output is also shorter than the gcc-generated output; I haven't done any detailed benchmarking, though. llvm-svn: 127852
* Augment CrashRecoveryContext to have registered "cleanup" objects that can ↵Ted Kremenek2011-03-181-0/+38
| | | | | | be used to release resources during a crash. llvm-svn: 127849
* The disassembler for Thumb was wrongly adding 4 to the computed imm32 offset.Johnny Chen2011-03-181-10/+2
| | | | | | Remove the offending logic and update the test cases. llvm-svn: 127843
* Remove TargetData and ValueTracking includes. I didn't mean for them to ↵Andrew Trick2011-03-181-4/+0
| | | | | | sneak in my last checkin. llvm-svn: 127842
* There are two pseudos in this case that are Thumb mode, not one.Owen Anderson2011-03-171-1/+1
| | | | llvm-svn: 127840
* Added isValidRewrite() to check the result of ScalarEvolutionExpander.Andrew Trick2011-03-172-37/+112
| | | | | | | | | SCEV may generate expressions composed of multiple pointers, which can lead to invalid GEP expansion. Until we can teach SCEV to follow strict pointer rules, make sure no bad GEPs creep into IR. Fixes rdar://problem/9038671. llvm-svn: 127839
* whitespaceAndrew Trick2011-03-171-18/+18
| | | | llvm-svn: 127837
* Use RequiresNullTerminator to create buffers without a null terminatorRafael Espindola2011-03-171-2/+4
| | | | | | instead of copying. llvm-svn: 127835
* Try to not lose variable's debug info during instcombine.Devang Patel2011-03-172-0/+30
| | | | | | | This is done by lowering dbg.declare intrinsic into dbg.value intrinsic. Radar 9143931. llvm-svn: 127834
* It used to be that t_addrmode_s4 was used for both:Johnny Chen2011-03-171-16/+13
| | | | | | | | | | | o A8.6.195 STR (register) -- Encoding T1 o A8.6.193 STR (immediate, Thumb) -- Encoding T1 It has been changed so that now they use different addressing modes and thus different MC representation (Operand Infos). Modify the disassembler to reflect the change, and add relevant tests. llvm-svn: 127833
* Refactor into a separate utility function.Devang Patel2011-03-172-29/+42
| | | | llvm-svn: 127832
* BuildUDIV: If the divisor is even we can simplify the fixup of the ↵Benjamin Kramer2011-03-171-9/+22
| | | | | | | | | | | | | | | | | | | | | | | multiplied value by introducing an early shift. This allows us to compile "unsigned foo(unsigned x) { return x/28; }" into shrl $2, %edi imulq $613566757, %rdi, %rax shrq $32, %rax ret instead of movl %edi, %eax imulq $613566757, %rax, %rcx shrq $32, %rcx subl %ecx, %eax shrl %eax addl %ecx, %eax shrl $4, %eax on x86_64 llvm-svn: 127829
* Add an argument to APInt's magic udiv calculation to specify the number of ↵Benjamin Kramer2011-03-171-2/+4
| | | | | | | | bits that are known zero in the divided number. This will come in handy soon. llvm-svn: 127828
* Dead code elimination may separate the live interval into multiple connected ↵Jakob Stoklund Olesen2011-03-175-22/+44
| | | | | | | | | components. I have convinced myself that it can only happen when a phi value dies. When it happens, allocate new virtual registers for the components. llvm-svn: 127827
* Add XCore intrinsic for setpsc.Richard Osborne2011-03-171-1/+5
| | | | llvm-svn: 127821
* MC/Mach-O: Fix regression introduced in r126127, this assignment shouldn't haveDaniel Dunbar2011-03-171-1/+2
| | | | | | been removed. llvm-svn: 127812
* Move more logic into getTypeForExtArgOrReturn.Cameron Zwarich2011-03-173-12/+14
| | | | llvm-svn: 127809
* Rename getTypeForExtendedInteger() to getTypeForExtArgOrReturn().Cameron Zwarich2011-03-173-4/+4
| | | | llvm-svn: 127807
* Add comments for the demanglings. Correct mangled form of operator delete!Nick Lewycky2011-03-171-4/+6
| | | | llvm-svn: 127801
* Add "swi" which is an obsolete mnemonic for "svc".Nick Lewycky2011-03-171-0/+1
| | | | llvm-svn: 127788
* A couple new README entries.Eli Friedman2011-03-171-0/+36
| | | | llvm-svn: 127786
* Fix handling of @IDNTPOFF relocations, they need to get STT_TLS.Joerg Sonnenberger2011-03-171-2/+5
| | | | | | While here, add VK_ARM_TPOFF and VK_ARM_GOTTPOFF, too. llvm-svn: 127780
* Rewrite instructions as part of ConnectedVNInfoEqClasses::Distribute.Jakob Stoklund Olesen2011-03-173-47/+34
| | | | llvm-svn: 127779
* Add a LiveRangeEdit delegate callback before shrinking a live range.Jakob Stoklund Olesen2011-03-163-1/+19
| | | | | | The register allocator needs to adjust its live interval unions when that happens. llvm-svn: 127774
* Erase virtual registers that are unused after DCE.Jakob Stoklund Olesen2011-03-161-4/+12
| | | | llvm-svn: 127773
* Tag cached interference with a user-provided tag instead of the virtual ↵Jakob Stoklund Olesen2011-03-163-7/+16
| | | | | | | | | register number. The live range of a virtual register may change which invalidates the cached interference information. llvm-svn: 127772
* Clarify debugging output.Jakob Stoklund Olesen2011-03-163-7/+17
| | | | llvm-svn: 127771
* The x86-64 ABI says that a bool is only guaranteed to be sign-extended to a byteCameron Zwarich2011-03-163-5/+14
| | | | | | | | | | | rather than an int. Thankfully, this only causes LLVM to miss optimizations, not generate incorrect code. This just fixes the zext at the return. We still insert an i32 ZextAssert when reading a function's arguments, but it is followed by a truncate and another i8 ZextAssert so it is not optimized. llvm-svn: 127766
* Don't recompute something that we already have in a local variable.Cameron Zwarich2011-03-161-2/+2
| | | | llvm-svn: 127764
* Revert r127757, "Patch to a fix dwarf relocation problem on ARM. One-line fixDaniel Dunbar2011-03-161-5/+2
| | | | | | | plus the test where it used to break.", which broke Clang self-host of a Debug+Asserts compiler, on OS X. llvm-svn: 127763
* Add XCore intrinsics for setclk, setrdy.Richard Osborne2011-03-161-1/+9
| | | | llvm-svn: 127761
* Patch to a fix dwarf relocation problem on ARM. One-line fix plus the test ↵Renato Golin2011-03-161-2/+5
| | | | | | where it used to break. llvm-svn: 127757
* Add checkevent intrinsic to check if any resources owned by the current threadRichard Osborne2011-03-162-55/+134
| | | | | | can event. llvm-svn: 127741
* Fix a comment.Cameron Zwarich2011-03-161-3/+3
| | | | llvm-svn: 127728
* lib/Support/raw_ostream.cpp: On mingw, report_fatal_error() should not be ↵NAKAMURA Takumi2011-03-161-0/+8
| | | | | | | | called at dtor context. report_fatal_error() invokes exit(). We know report_fatal_error() might not write messages to stderr when any errors were detected on FD == 2. llvm-svn: 127726
* Windows/PathV2.inc: [PR8520] Recognize "NUL" as special (character) file.NAKAMURA Takumi2011-03-161-1/+8
| | | | | FIXME: It is a temporal hack. We should detect as many "special file name" as possible. llvm-svn: 127724
* Windows/Path.inc: [PR6270] PathV1::makeUnique(): Give arbitrary initial seed ↵NAKAMURA Takumi2011-03-161-1/+11
| | | | | | | for workaround. FIXME: We should use sys::fs::unique_file() in future. llvm-svn: 127723
* Tidy up. Whitespace and 80 column.Jim Grosbach2011-03-162-17/+20
| | | | llvm-svn: 127721
* Do not accidently initialize NumDbgValueLost and NumDbgLineLost counts.Devang Patel2011-03-161-4/+4
| | | | llvm-svn: 127720
* Only convert allocas to scalars if it is profitable. The profitability metric ICameron Zwarich2011-03-161-2/+16
| | | | | | | | | | | chose is having a non-memcpy/memset use and being larger than any native integer type. Originally I chose having an access of a size smaller than the total size of the alloca, but this caused some minor issues on the spirit benchmark where SRoA runs again after some inlining. This fixes <rdar://problem/8613163>. llvm-svn: 127718
* Better use initializer lists.Cameron Zwarich2011-03-161-5/+2
| | | | llvm-svn: 127716
* Add a clarifying comment.Cameron Zwarich2011-03-161-1/+1
| | | | llvm-svn: 127715
* There were two issues fixed:Johnny Chen2011-03-151-12/+5
| | | | | | | | | | | | | | | | 1. The ARM Darwin *r9 call instructions were pseudo-ized recently. Modify the ARMDisassemblerCore.cpp file to accomodate the change. 2. The disassembler was unnecessarily adding 8 to the sign-extended imm24: imm32 = SignExtend(imm24:'00', 32); // A8.6.23 BL, BLX (immediate) // Encoding A1 It has no business doing such. Removed the offending logic. Add test cases to arm-tests.txt. llvm-svn: 127707
* Add scei vendorJohn Thompson2011-03-151-0/+3
| | | | llvm-svn: 127705
* The VTBL (and VTBX) instructions are rather permissive concerning the masks theyBill Wendling2011-03-151-0/+8
| | | | | | | accept. If a value in the mask is out of range, it uses the value 0, for VTBL, or leaves the value unchanged, for VTBX. llvm-svn: 127700
* Trace back through sibling copies to hoist spills and find rematerializable ↵Jakob Stoklund Olesen2011-03-151-10/+208
| | | | | | | | | | | | | defs. After live range splitting, an original value may be available in multiple registers. Tracing back through the registers containing the same value, find the best place to insert a spill, determine if the value has already been spilled, or discover a reaching def that may be rematerialized. This is only the analysis part. The information is not used for anything yet. llvm-svn: 127698
* Preserve both isPHIDef and isDefByCopy bits when copying parent values.Jakob Stoklund Olesen2011-03-151-5/+4
| | | | llvm-svn: 127697
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