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* X86: Turn fp selects into mask operations.Benjamin Kramer2013-08-04
| | | | | | | | | | | | | | | | | | | | | | | double test(double a, double b, double c, double d) { return a<b ? c : d; } before: _test: ucomisd %xmm0, %xmm1 ja LBB0_2 movaps %xmm3, %xmm2 LBB0_2: movaps %xmm2, %xmm0 after: _test: cmpltsd %xmm1, %xmm0 andpd %xmm0, %xmm2 andnpd %xmm3, %xmm0 orpd %xmm2, %xmm0 Small speedup on Benchmarks/SmallPT git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187706 91177308-0d34-0410-b5e6-96231b3b80d8
* Disambiguate function names in some CodeGen tests. (Some tests were using ↵Stephen Lin2013-07-18
| | | | | | function names that also were names of instructions and/or doing other unusual things that were making the test not amenable to otherwise scriptable pattern matching.) No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186621 91177308-0d34-0410-b5e6-96231b3b80d8
* Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to ↵Stephen Lin2013-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186280 91177308-0d34-0410-b5e6-96231b3b80d8
* When unsafe math is used, we can use commutative FMAX and FMIN. In some casesNadav Rotem2012-08-19
| | | | | | | | | | | | | | | | | | | | | | this allows for better code generation. Added a new DAGCombine transformation to convert FMAX and FMIN to FMANC and FMINC, which are commutative. For example: movaps %xmm0, %xmm1 movsd LC(%rip), %xmm0 minsd %xmm1, %xmm0 becomes: minsd LC(%rip), %xmm0 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162187 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 Peephole: fold loads to the source register operand if possible.Manman Ren2012-08-02
| | | | | | | | | | | Add more comments and use early returns to reduce nesting in isLoadFoldable. Also disable folding for V_SET0 to avoid introducing a const pool entry and a const pool load. rdar://10554090 and rdar://11873276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161207 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 Peephole: fold loads to the source register operand if possible.Manman Ren2012-08-02
| | | | | | | | | | | | | Machine CSE and other optimizations can remove instructions so folding is possible at peephole while not possible at ISel. This patch is a rework of r160919 and was tested on clang self-host on my local machine. rdar://10554090 and rdar://11873276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161152 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r160920 and r160919 due to dragonegg and clang selfhost failureManman Ren2012-07-29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160927 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 Peephole: fold loads to the source register operand if possible.Manman Ren2012-07-28
| | | | | | | Trying to fix the bot by specifying a triple in the failing testing cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160920 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 Peephole: fold loads to the source register operand if possible.Manman Ren2012-07-28
| | | | | | | | | | Machine CSE and other optimizations can remove instructions so folding is possible at peephole while not possible at ISel. rdar://10554090 and rdar://11873276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160919 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the "-promote-elements" flag. This flag is now enabled by default.Nadav Rotem2012-06-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157925 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove -join-physregs from the test suite.Jakob Stoklund Olesen2012-05-17
| | | | | | | | | | | | | | This option has been disabled for a while, and it is going away so I can clean up the coalescer code. The tests that required physreg joining to be enabled were almost all of the form "tiny function with interference between arguments and return value". Such functions are usually inlined in the real world. The problem exposed by phys_subreg_coalesce-3.ll is real, but fairly rare. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157027 91177308-0d34-0410-b5e6-96231b3b80d8
* Add mcpu to tests to prevent them from using AVX instructions on Sandy ↵Craig Topper2012-04-27
| | | | | | Bridge after r155618. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155696 91177308-0d34-0410-b5e6-96231b3b80d8
* Make X86::FsFLD0SS / FsFLD0SD real pseudo-instructions.Jakob Stoklund Olesen2011-11-29
| | | | | | | | | Like V_SET0, these instructions are expanded by ExpandPostRA to xorps / vxorps so they can participate in execution domain swizzling. This also makes the AVX variants redundant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145440 91177308-0d34-0410-b5e6-96231b3b80d8
* Synthesize x86 max/min instructions also for vectors (i.e. produceDuncan Sands2011-09-17
| | | | | | | | | | maxps and maxpd). This broke the sse41-blend.ll testcase by causing maxpd to be produced rather than a cmp+blend pair, which is the reason I tweaked it. Gives a small speedup on doduc with dragonegg when the GCC vectorizer is used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139986 91177308-0d34-0410-b5e6-96231b3b80d8
* Prepare remaining tests for -join-physreg going away.Jakob Stoklund Olesen2011-05-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130893 91177308-0d34-0410-b5e6-96231b3b80d8
* Split -enable-finite-only-fp-math to two options:Evan Cheng2010-07-15
| | | | | | | -enable-no-nans-fp-math and -enable-no-infs-fp-math. All of the current codegen fp math optimizations only care whether the fp arithmetics arguments and results can never be NaN. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108465 91177308-0d34-0410-b5e6-96231b3b80d8
* -enable-unsafe-fp-math should not imply -enable-finite-only-fp-math.Evan Cheng2010-07-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108254 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a few testsJakob Stoklund Olesen2010-07-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108011 91177308-0d34-0410-b5e6-96231b3b80d8
* When forming SSE min and max nodes for UGE and ULE comparisons, it'sDan Gohman2010-02-24
| | | | | | | | | | | | necessary to swap the operands to handle NaN and negative zero properly. Also, reintroduce logic for checking for NaN conditions when forming SSE min and max instructions, fixed to take into consideration NaNs and negative zeros. This allows forming min and max instructions in more cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97025 91177308-0d34-0410-b5e6-96231b3b80d8
* Actually enable the -enable-unsafe-fp-math tests.Dan Gohman2010-02-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96796 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the logic for reasoning about NaNs from the code that formsDan Gohman2010-02-22
| | | | | | | | | | | SSE min and max instructions. The real thing this code needs to be concerned about is negative zero. Update the sse-minmax.ll test accordingly, and add tests for -enable-unsafe-fp-math mode as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96775 91177308-0d34-0410-b5e6-96231b3b80d8
* Recognize SSE min and max opportunities in even more cases.Dan Gohman2009-09-21
| | | | | | | | | | | And fix a bug with the behavior of min/max instructions formed from fcmp uge comparisons. Also, use FiniteOnlyFPMath() for this code instead of UnsafeFPMath, as it is more specific. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82466 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate more uses of llvm-as and llvm-dis.Dan Gohman2009-09-08
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81290 91177308-0d34-0410-b5e6-96231b3b80d8
* Recognize more opportunities to use SSE min and max instructions,Dan Gohman2009-09-03
swapping the operands if necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80940 91177308-0d34-0410-b5e6-96231b3b80d8
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