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* Stage two of fixing pre-alloc-splitting's code size issues: filter out ↵Owen Anderson2009-01-231-9/+37
| | | | | | | | | | restores that are just going to be re-spilled again. This also helps performance. Pre-alloc-splitting now seems to be an overall win on SPEC. llvm-svn: 62834
* Cross register class coalescing. Not yet enabled.Evan Cheng2009-01-232-109/+123
| | | | llvm-svn: 62832
* Code did not follow associated comment. not a good idea.Devang Patel2009-01-231-1/+1
| | | | llvm-svn: 62828
* Set appropriate tag for the composite type.Devang Patel2009-01-231-0/+1
| | | | llvm-svn: 62827
* a minor tweak to my previous patch, handle the invalidation caseChris Lattner2009-01-231-3/+4
| | | | | | when there are multiple iterations of the loop. This fixes PR3375. llvm-svn: 62822
* Add an initial pass at dead spill/restore removal for pre alloc splitting.Owen Anderson2009-01-231-4/+56
| | | | llvm-svn: 62821
* do not sign extend characters input to isprint. This improvesChris Lattner2009-01-221-1/+1
| | | | | | compatibility with VC++. Patch by Max Burke! llvm-svn: 62813
* Fix a minor bug in DAGCombiner's folding of SELECT. Folding "select C, 0, 1"Bob Wilson2009-01-221-3/+5
| | | | | | | | | | | | | | | | | | | | | | to "C ^ 1" is only valid when C is known to be either 0 or 1. Most of the similar foldings in this function only handle "i1" types, but this one appears intentionally written to handle larger integer types. If C has an integer type larger than "i1", this needs to check if the high bits of a boolean are known to be zero. I also changed the comment to describe this folding as "C ^ 1" instead of "~C", since that is what the code does and since the latter would only be valid for "i1" types. The good news is that most LLVM targets use TargetLowering::ZeroOrOneBooleanContent so this change will not disable the optimization; the bad news is that I've been unable to come up with a testcase to demonstrate the problem. I have also removed a "FIXME" comment for folding "select C, X, 0" to "C & X", since the code looks correct to me. It could be made more aggressive by not limiting the type to "i1", but that would then require checking for TargetLowering::ZeroOrNegativeOneBooleanContent. Similar changes could be done for the other SELECT foldings, but it was decided to be not worth the trouble and complexity (see e.g., r44663). llvm-svn: 62790
* Don't create ISD::FNEG nodes after legalize if they aren't legal.Dan Gohman2009-01-222-8/+30
| | | | | | | | | | | | | | Simplify x+0 to x in unsafe-fp-math mode. This avoids a bunch of redundant work in many cases, because in unsafe-fp-math mode, ISD::FADD with a constant is considered free to negate, so the DAGCombiner often negates x+0 to -0-x thinking it's free, when in reality the end result is -x, which is more expensive than x. Also, combine x*0 to 0. This fixes PR3374. llvm-svn: 62789
* introduce a useful abstraction to find out if a Use is in the call position ↵Gabor Greif2009-01-224-9/+8
| | | | | | of an instruction llvm-svn: 62788
* Revert r62553 and r62616 due to issues with portability.Tanya Lattner2009-01-221-206/+496
| | | | llvm-svn: 62777
* rename methods in System/Host to be more consistent.Chris Lattner2009-01-223-8/+8
| | | | llvm-svn: 62776
* Add SelectionDAG::getNOT method to construct bitwise NOT operations,Bob Wilson2009-01-225-34/+41
| | | | | | | corresponding to the "not" and "vnot" PatFrags. Use the new method in some places where it seems appropriate. llvm-svn: 62768
* Few targets like the tiny little PIC16 have only 16-bit pointers.Sanjiv Gupta2009-01-221-0/+4
| | | | llvm-svn: 62763
* Eliminate a couple of fields from TargetRegisterClass: SubRegClasses and ↵Evan Cheng2009-01-223-37/+7
| | | | | | SuperRegClasses. These are not necessary. Also eliminate getSubRegisterRegClass and getSuperRegisterRegClass. These are slow and their results can change if register file names change. Just use TargetLowering::getRegClassFor() to get the right TargetRegisterClass instead. llvm-svn: 62762
* fix a typoChris Lattner2009-01-221-1/+1
| | | | llvm-svn: 62761
* add a noteChris Lattner2009-01-221-0/+10
| | | | llvm-svn: 62760
* Fix PR3358, a really nasty bug where recursive phi translated Chris Lattner2009-01-221-3/+36
| | | | | | | | analyses could be run without the caches properly sorted. This can fix all sorts of weirdness. Many thanks to Bill for coming up with the 'issorted' verification idea. llvm-svn: 62757
* Recognize inline asm for bswap on x86-64 GLIBC. This allows itDan Gohman2009-01-211-1/+11
| | | | | | to be supported in the JIT. llvm-svn: 62730
* Do not use host floating point types when emittingDale Johannesen2009-01-213-9/+14
| | | | | | | | | ASCII IR; loading and storing these can change the bits of NaNs on some hosts. Remove or add warnings at a few other places using host floating point; this is a bad thing to do in general. llvm-svn: 62712
* Also favors NOT64r.Evan Cheng2009-01-211-1/+1
| | | | llvm-svn: 62710
* fix warning in release-asserts mode and spelling of assert.Chris Lattner2009-01-211-3/+2
| | | | llvm-svn: 62699
* add getPointerToGlobal to the C bindings, patch by Lennart Augustsson!Chris Lattner2009-01-211-0/+4
| | | | | | PR3364 llvm-svn: 62697
* Remove uses of uint32_t in favor of 'unsigned' for better Chris Lattner2009-01-212-194/+194
| | | | | | compatibility with cygwin. Patch by Jay Foad! llvm-svn: 62695
* Simplify ReduceLoadWidth's logic: it doesn't need several differentDan Gohman2009-01-211-19/+10
| | | | | | | | special cases after producing the new reduced-width load, because the new load already has the needed adjustments built into it. This fixes several bugs due to the special cases, including PR3317. llvm-svn: 62692
* Fix a recent regression. ClrOpcode is not set for i8; for i8, ifDan Gohman2009-01-211-2/+3
| | | | | | | we want to clear %ah to zero before a division, just use a zero-extending mov to %al. This fixes PR3366. llvm-svn: 62691
* Mimic gcc behaviour with regard to response files.Mikhail Glushenkov2009-01-211-16/+15
| | | | llvm-svn: 62688
* Fixed build warnings. Restoring changes done in 62600, they were lost in 62655.Sanjiv Gupta2009-01-212-4/+5
| | | | llvm-svn: 62681
* Cleanup whitespace and comments, and tweak someDuncan Sands2009-01-217-67/+64
| | | | | | | prototypes, in operand type legalization. No functionality change. llvm-svn: 62680
* I accidentally removed this check in an earlier commit, which cause breakage ↵Owen Anderson2009-01-211-0/+4
| | | | | | in the pre alloc splitter. llvm-svn: 62678
* Implement LowerOperationWrapper for legalizer. Sanjiv Gupta2009-01-215-138/+174
| | | | | | Also a few signed comparison fixes. llvm-svn: 62665
* CellSPU:Scott Michel2009-01-219-130/+317
| | | | | | | | | | | | | - Ensure that (operation) legalization emits proper FDIV libcall when needed. - Fix various bugs encountered during llvm-spu-gcc build, along with various cleanups. - Start supporting double precision comparisons for remaining libgcc2 build. Discovered interesting DAGCombiner feature, which is currently solved via custom lowering (64-bit constants are not legal on CellSPU, but DAGCombiner insists on inserting one anyway.) - Update README. llvm-svn: 62664
* Allow targets to legalize operations (with illegal operands) that produces ↵Sanjiv Gupta2009-01-215-68/+85
| | | | | | multiple values. For example, a load with an illegal operand (a load produces two values, a value and chain). llvm-svn: 62663
* Favors generating "not" over "xor -1". For example.Evan Cheng2009-01-211-0/+3
| | | | | | | | | | | | | | | | | unsigned test(unsigned a) { return ~a; } llvm used to generate: movl $4294967295, %eax xorl 4(%esp), %eax Now it generates: movl 4(%esp), %eax notl %eax It's 3 bytes shorter. llvm-svn: 62661
* Make special cases (0 inf nan) work for frem.Dale Johannesen2009-01-213-38/+68
| | | | | | | | Besides APFloat, this involved removing code from two places that thought they knew the result of frem(0., x) but were wrong. llvm-svn: 62645
* Be more aggressive about renumbering vregs after splitting them.Owen Anderson2009-01-211-3/+7
| | | | llvm-svn: 62639
* Encode member accessibility.Devang Patel2009-01-211-1/+5
| | | | llvm-svn: 62638
* Appropriately mark fowrad decls.Devang Patel2009-01-201-11/+8
| | | | llvm-svn: 62625
* Fix PR3243: a LiveVariables bug. When HandlePhysRegKill is checking whether ↵Evan Cheng2009-01-201-13/+15
| | | | | | the last reference is also the last def (i.e. dead def), it should also check if last reference is the current machine instruction being processed. This can happen when it is processing a physical register use and setting the current machine instruction as sub-register's last ref. llvm-svn: 62617
* Fix typo. Patch by Alexei Svitkine.Duncan Sands2009-01-201-1/+1
| | | | llvm-svn: 62616
* Use "SINT_TO_FP" instead of "UINT_TO_FP" when getting the exponent. This wasBill Wendling2009-01-201-12/+13
| | | | | | | causing the limited precision stuff to produce the wrong result for values in the range [0, 1). llvm-svn: 62615
* Fix struct member's debug info.Devang Patel2009-01-201-7/+24
| | | | llvm-svn: 62610
* Need only one set of debug info versions enum.Devang Patel2009-01-202-6/+6
| | | | llvm-svn: 62602
* Change TargetInstrInfo::isMoveInstr to return source and destination ↵Evan Cheng2009-01-2031-123/+157
| | | | | | sub-register indices as well. llvm-svn: 62600
* Fix global variable's address in a DIE.Devang Patel2009-01-201-1/+1
| | | | llvm-svn: 62596
* Enable debug info for enums.Devang Patel2009-01-201-10/+14
| | | | llvm-svn: 62594
* Add an IEEE remainder function, which is notDale Johannesen2009-01-201-1/+39
| | | | | | | | fully implemented yet and not used. This is mainly to clarify that APFloat::mod implements C fmod, not remainder. llvm-svn: 62593
* improve compatibility with various versions of graphviz, patch byChris Lattner2009-01-201-1/+1
| | | | | | Patrick Boettcher! llvm-svn: 62592
* Eliminate use of uint32_t to improve compatibility with cygwinChris Lattner2009-01-201-6/+6
| | | | llvm-svn: 62590
* Enable debug info for composite types.Devang Patel2009-01-201-4/+0
| | | | llvm-svn: 62589
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