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* (For X86) Enhancement to add-carray/sub-borrow (adc/sbb) optimization.Shuxin Yang2012-10-312-1/+13
| | | | | | | | | | | | | The adc/sbb optimization is to able to convert following expression into a single adc/sbb instruction: (ult) ... = x + 1 // where the ult is unsigned-less-than comparison (ult) ... = x - 1 This change is to flip the "x >u y" (i.e. ugt comparison) in order to expose the adc/sbb opportunity. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167180 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopVectorize: Preserve NSW, NUW and IsExact flags.Nadav Rotem2012-10-317-7/+62
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167174 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a bug in the cost calculation of vector casts. Detect situations where ↵Nadav Rotem2012-10-311-0/+48
| | | | | | bitcasts cost zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167170 91177308-0d34-0410-b5e6-96231b3b80d8
* [mips] Set isAsCheapAsAMove flag on ADDiu and DADDiu, which enablesAkira Hatanaka2012-10-311-0/+26
| | | | | | | | re-materialization of immediate loads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167153 91177308-0d34-0410-b5e6-96231b3b80d8
* Test case for r167039. Check that tail-call optimization is disabled forAkira Hatanaka2012-10-311-0/+23
| | | | | | | | mips16. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167139 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove fixme about unreachable cases from SwitchToLookupTableHans Wennborg2012-10-311-0/+32
| | | | | | SimplifyCFG will have removed those cases for us. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167132 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Choose pair ordering to minimize shufflesHal Finkel2012-10-319-21/+46
| | | | | | | | | | | | | | | | | | | | BBVectorize would, except for loads and stores, always fuse instructions so that the first instruction (in the current source order) would always represent the low part of the input vectors and the second instruction would always represent the high part. This lead to too many shuffles being produced because sometimes the opposite order produces fewer of them. With this change, BBVectorize tracks the kind of pair connections that form the DAG of candidate pairs, and uses that information to reorder the pairs to avoid excess shuffles. Using this information, a future commit will be able to add VTTI-based shuffle costs to the pair selection procedure. Importantly, the number of remaining shuffles can now be estimated during pair selection. There are some trivial instruction reorderings in the test cases, and one simple additional test where we certainly want to do a reordering to avoid an unnecessary shuffle. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167122 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate strto* optimizationsMeador Inge2012-10-312-14/+82
| | | | | | | This patch migrates the strto* optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167119 91177308-0d34-0410-b5e6-96231b3b80d8
* Do simple constant propagation in lookup table formation for switchesHans Wennborg2012-10-311-0/+41
| | | | | | | | | | | | | | | | | | | By propagating the value for the switch condition, LLVM can now build lookup tables for code such as: switch (x) { case 1: return 5; case 2: return 42; case 3: case 4: case 5: return x - 123; default: return 123; } Given that x is known for each case, "x - 123" becomes a constant for cases 3, 4, and 5. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167115 91177308-0d34-0410-b5e6-96231b3b80d8
* LCSSA: Add a workaround for another nasty SCEV cache invalidation issue.Benjamin Kramer2012-10-311-0/+74
| | | | | | | I'm not entirely happy with this solution, but I don't see a smarter way currently. Fixes PR14214. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167112 91177308-0d34-0410-b5e6-96231b3b80d8
* DependenceAnalysis: Don't crash if there is no constant operand.Benjamin Kramer2012-10-311-0/+25
| | | | | | This makes the code match the comments. Resolves a crash in loop idiom (PR14219). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167110 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement ADJCALLSTACKUP and ADJCALLSTACKDOWNReed Kotler2012-10-311-26/+58
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167107 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate strpbrk optimizationsMeador Inge2012-10-313-25/+91
| | | | | | | This patch migrates the strpbrk optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167105 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate strlen optimizationsMeador Inge2012-10-313-62/+115
| | | | | | | This patch migrates the strlen optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167103 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate strncpy optimizationsMeador Inge2012-10-314-38/+126
| | | | | | | This patch migrates the strncpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167102 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopVectorize: Do not vectorize loops with tiny constant trip counts.Nadav Rotem2012-10-311-0/+33
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167101 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch addresses an ABI compatibility issue with empty aggregateBill Schmidt2012-10-311-0/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | parameters. Examples of these are: struct { } a; union { } b[256]; int a[0]; An empty aggregate has an address, although dereferencing that address is pointless. When passed as a parameter, an empty aggregate does not consume a protocol register, nor does it consume a doubleword in the parameter save area. Passing an empty aggregate by reference passes an address just as for any other aggregate. Returning an empty aggregate uses GPR3 as a hidden address of the return value location, just as for any other aggregate. The patch modifies PPCTargetLowering::LowerFormalArguments_64SVR4 and PPCTargetLowering::LowerCall_64SVR4 to properly skip empty aggregate parameters passed by value. The handling of return values and by-reference parameters was already correct. Built on powerpc64-unknown-linux-gnu and tested with no new regressions. A test case is included to test proper handling of empty aggregate parameters on both sides of the function call protocol. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167090 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for loops that don't start with Zero.Nadav Rotem2012-10-312-0/+84
| | | | | | | | | This is important for loops in the LAPACK test-suite. These loops start at 1 because they are auto-converted from fortran. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167084 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate stpcpy optimizationsMeador Inge2012-10-314-46/+71
| | | | | | | | This patch migrates the stpcpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. Note that the __stpcpy_chk simplifications were migrated in a previous commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167083 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Split out the __stpcpy_chk simplifications from StrCpyChkOptMeador Inge2012-10-312-0/+117
| | | | | | | | | | | | | | | | r166198 migrated the strcpy optimization to instcombine. The strcpy simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp was also doing some __strcpy_chk simplifications. Those fortified simplifications were migrated as well, but introduced a bug in the __stpcpy_chk simplifier in the process. This happened because the __strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt which was updated with simplifications that worked for __strcpy_chk, but not __stpcpy_chk. This patch fixes the problem by adding proper test coverage and creating a new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167082 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 SSE: update rsqrtss and rcpss to use two source operands andManman Ren2012-10-301-0/+36
| | | | | | | | | | | | | the first source operand is tied to the destination operand. This is to accurately model the corresponding instructions where the upper bits are unmodified. rdar://12558838 PR14221 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167064 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 MMX: optimize transfer from mmx to i32Manman Ren2012-10-301-0/+14
| | | | | | | | | | We used to generate a store (movq) + a load. Now we use movd. rdar://9946746 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167056 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR14212: For some strange reason I treated vectors differently fromChandler Carruth2012-10-301-0/+15
| | | | | | | | | integers in that the code to handle split alloca-wide integer loads or stores doesn't come first. It should, for the same reasons as with integers, and the PR attests to that. Also had to fix a busted assert in that this test case also covers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167051 91177308-0d34-0410-b5e6-96231b3b80d8
* [mips] Allow tail-call optimization for vararg functions and functions whichAkira Hatanaka2012-10-301-1/+65
| | | | | | | | use the caller's stack. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167048 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopIdiom: Fix a serious missed optimization: we only turned top-level loops ↵Benjamin Kramer2012-10-301-0/+42
| | | | | | | | into memmove. Thanks to Preston Briggs for catching this! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167045 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Fix a small bug introduced in r167042.Hal Finkel2012-10-301-0/+28
| | | | | | | We need to make sure that we take the correct load/store alignment when the inputs are flipped. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167044 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopVectorize: Add support for write-only loops when the write destination ↵Nadav Rotem2012-10-301-0/+26
| | | | | | | | | | is a single pointer. Speedup SciMark by 1% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167035 91177308-0d34-0410-b5e6-96231b3b80d8
* PowerPC: Expand FSRQT for vector typesAdhemerval Zanella2012-10-301-0/+71
| | | | | | | | | This patch expands FSQRT for floating point vector types when altivec is used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167034 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopVectorize: Fix a bug in the initialization of reduction variables. AND ↵Nadav Rotem2012-10-301-0/+1
| | | | | | | | | | needs to start at all-one while XOR, and OR need to start at zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167032 91177308-0d34-0410-b5e6-96231b3b80d8
* Set %defaultjit to use MCJIT for PowerPC targets.Ulrich Weigand2012-10-302-2/+3
| | | | | | | | Update Transforms/LICM/2003-12-11-SinkingToPHI.ll test to use %defaultjit as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167031 91177308-0d34-0410-b5e6-96231b3b80d8
* Change ForceSizeOpt attribute into MinSize attributeQuentin Colombet2012-10-303-9/+9
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167020 91177308-0d34-0410-b5e6-96231b3b80d8
* switch_to_lookup_table.ll: Remove some unnecessary lines, comments,Hans Wennborg2012-10-301-625/+214
| | | | | | function attributes, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167016 91177308-0d34-0410-b5e6-96231b3b80d8
* PowerPC: More support for Altivec compare operationsAdhemerval Zanella2012-10-301-14/+350
| | | | | | | | | | This patch adds more support for vector type comparisons using altivec. It adds correct support for v16i8, v8i16, v4i32, and v4f32 vector types for comparison operators ==, !=, >, >=, <, and <=. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167015 91177308-0d34-0410-b5e6-96231b3b80d8
* Enable some additional constant folding for PPCDoubleDouble.Ulrich Weigand2012-10-301-2/+1
| | | | | | | This fixes Clang :: CodeGen/complex-builtints.c on PowerPC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167013 91177308-0d34-0410-b5e6-96231b3b80d8
* Use TargetTransformInfo to control switch-to-lookup table transformationHans Wennborg2012-10-303-84/+38
| | | | | | | | | | | | | | When the switch-to-lookup tables transform landed in SimplifyCFG, it was pointed out that this could be inappropriate for some targets. Since there was no way at the time for the pass to know anything about the target, an awkward reverse-transform was added in CodeGenPrepare that turned lookup tables back into switches for some targets. This patch uses the new TargetTransformInfo to determine if a switch should be transformed, and removes CodeGenPrepare::ConvertLoadToSwitch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167011 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove an invalid assert in TargetTransformImplHal Finkel2012-10-301-0/+12
| | | | | | | getCastInstrCost had an assert prohibiting scalar to vector casts. Such casts, however, are allowed. This should make the vectorizer buildbot happier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166998 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM: Better disassembly for pc-relative LDR.Jim Grosbach2012-10-305-7/+9
| | | | | | | | | When the operand is a plain immediate rather than a label, print it as [pc, #imm] like we do for the Thumb2 wide encoding variant. rdar://12154503 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166991 91177308-0d34-0410-b5e6-96231b3b80d8
* Change mips16 delay slot jumps to non delay slot forms by default.Reed Kotler2012-10-302-3/+3
| | | | | | | | | | We will make them delay slot forms if there is something that can be placed in the delay slot during a separate pass. Mips16 extended instructions cannot be placed in delay slots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166990 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-commit r166971. I reverted it to quickly, when buildbots didn't have a chanceJakub Staszak2012-10-301-5/+9
| | | | | | | to test it with chapni's fix (-mattr=+avx). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166985 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix ARM's b.w instruction for thumb 2 and the encoding T4. The branch targetKevin Enderby2012-10-292-0/+15
| | | | | | | | is 24 bits not 20 and the decoding needed to correctly handle converting the J1 and J2 bits to their I1 and I2 values to reconstruct the displacement. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166982 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r166971. It causes buildbot failure. To be investigated.Jakub Staszak2012-10-291-9/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166979 91177308-0d34-0410-b5e6-96231b3b80d8
* llvm/test/CodeGen/X86/vec_shuffle-30.ll: Try to unbreak builds - assuming +avx.NAKAMURA Takumi2012-10-291-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166974 91177308-0d34-0410-b5e6-96231b3b80d8
* Allow to fold vector load if there is more than one bitcast, so in the case:Jakub Staszak2012-10-291-5/+9
| | | | | | | | | | | | | | | | | | | | %0 = load <8 x i16>* %dest %1 = shufflevector <8 x i16> %0, <8 x i16> %in, <8 x i32> < i32 0, i32 1, i32 2, i32 3, i32 13, i32 undef, i32 14, i32 14> store <8 x i16> %1, <8 x i16>* %dest We get: vmovlpd (%eax), %xmm0, %xmm0 instead of: vmovaps (%eax), %xmm1 vmovsd %xmm1, %xmm0, %xmm0 No extra test-case is added. I just fixed the existing one (also it uses FileCheck now). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166971 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch solves a problem with passing varargs parameters under the PPC64Bill Schmidt2012-10-291-0/+23
| | | | | | | | | | | | | | | | | | | ELF ABI. A varargs parameter consisting of a single-precision floating-point value, or of a single-element aggregate containing a single-precision floating-point value, must be passed in the low-order (rightmost) four bytes of the doubleword stack slot reserved for that parameter. If there are GPR protocol registers remaining, the parameter must also be mirrored in the low-order four bytes of the reserved GPR. Prior to this patch, such parameters were being passed in the high-order four bytes of the stack slot and the mirrored GPR. The patch adds a new test case to verify the correct code generation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166968 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement patterns for extloadi8 and extloadi16Reed Kotler2012-10-291-0/+69
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166960 91177308-0d34-0410-b5e6-96231b3b80d8
* In various places throughout the code generator, there were specialUlrich Weigand2012-10-291-1/+2
| | | | | | | | | | checks to avoid performing compile-time arithmetic on PPCDoubleDouble. Now that APFloat supports arithmetic on PPCDoubleDouble, those checks are no longer needed, and we can treat the type like any other. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166958 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove redundant test case from r166949, per Eli's suggestion.Chad Rosier2012-10-291-107/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166953 91177308-0d34-0410-b5e6-96231b3b80d8
* [ms-inline asm] Add support for the [] operator. Essentially, [expr1][expr2] isChad Rosier2012-10-292-0/+157
| | | | | | | equivalent to [expr1 + expr2]. See test cases for more examples. rdar://12470392 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166949 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR14204Michael Liao2012-10-291-0/+15
| | | | | | | | - Add missing pattern on X86ISD::VZEXT from VR256 to VR256 when AVX2 is enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166947 91177308-0d34-0410-b5e6-96231b3b80d8
* Completely disallow partial copies in adjustCopiesBackFrom().Jakob Stoklund Olesen2012-10-291-0/+28
| | | | | | | | | | | | Partial copies can show up even when CoalescerPair.isPartial() returns false. For example: %vreg24:dsub_0<def> = COPY %vreg31:dsub_0; QPR:%vreg24,%vreg31 Such a partial-partial copy is not good enough for the transformation adjustCopiesBackFrom() needs to do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166944 91177308-0d34-0410-b5e6-96231b3b80d8
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