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66 Commits

Author SHA1 Message Date
Evan Cheng b9a0abb129 Indentation. 
llvm-svn: 55880
 2008-09-07 09:04:52 +00:00
Owen Anderson 1dd2e40521 Revert r55859. This is breaking the build in the abscence of its companion commit. 
llvm-svn: 55865
 2008-09-05 23:36:01 +00:00
Dan Gohman fd634599dc FastISel support for AND and OR with type i1. 
llvm-svn: 55846
 2008-09-05 18:44:22 +00:00
Dan Gohman fcf545690c FastISel support for ConstantExprs. 
llvm-svn: 55843
 2008-09-05 18:18:20 +00:00
Dan Gohman ea56bdde34 FastISel support for unreachable. 
llvm-svn: 55818
 2008-09-05 01:08:41 +00:00
Owen Anderson 50288e3c99 Add initial support for selecting constant materializations that require constant 
pool loads on X86 in fast isel.  This isn't actually used yet.

llvm-svn: 55814
 2008-09-05 00:06:23 +00:00
Dan Gohman e039d5580e Do trivial local CSE for constants and other non-Instruction values 
in FastISel.

llvm-svn: 55748
 2008-09-03 23:32:19 +00:00
Dan Gohman 7bda51f5a4 Create HandlePHINodesInSuccessorBlocksFast, a version of 
HandlePHINodesInSuccessorBlocks that works FastISel-style. This
allows PHI nodes to be updated correctly while using FastISel.

This also involves some code reorganization; ValueMap and
MBBMap are now members of the FastISel class, so they needn't
be passed around explicitly anymore. Also, SelectInstructions
is changed to SelectInstruction, and only does one instruction
at a time.

llvm-svn: 55746
 2008-09-03 23:12:08 +00:00
Owen Anderson b1b9398ea7 Oops, I accidentally broke the fallback case with my last commit. 
llvm-svn: 55704
 2008-09-03 17:51:57 +00:00
Owen Anderson ea666816c2 Fix an issue where we were reusing materializations of constants in blocks not dominated by the materialization. This is 
the simple fix, materializing the constant before every use.  It might be better to either track domination of uses or
to materialize all constants and the beginning of the function and let remat sort when to do materialization at uses.

llvm-svn: 55703
 2008-09-03 17:37:03 +00:00
Evan Cheng 09ff2e7372 80 col violations. 
llvm-svn: 55668
 2008-09-02 21:59:13 +00:00
Owen Anderson 6f0c51d9da Fix an issue where a use might be selected before a def, and then we didn't respect the pre-chosen vreg 
assignment when selecting the def.  This is the naive solution to the problem: insert a copy to the pre-chosen
vreg.  Other solutions might be preferable, such as:
  1) Passing the dest reg into FastEmit_.  However, this would require the higher level code to know about reg classes, which they don't currently.
  2) Selecting blocks in reverse postorder.  This has some compile time cost for computing the order, and we'd need to measure its impact.

llvm-svn: 55555
 2008-08-30 00:38:46 +00:00
Dan Gohman c45733f194 Implement null and undef values for FastISel. 
llvm-svn: 55500
 2008-08-28 21:19:07 +00:00
Owen Anderson d8a82b75e2 Hook up support for fast-isel of trunc instructions, using the newly working support for EXTRACT_SUBREG. 
llvm-svn: 55482
 2008-08-28 18:26:01 +00:00
Owen Anderson 9cd1a5e530 FastEmitInst_extractsubreg doesn't need to be passed the register class. It can get it from MachineRegisterInfo instead. 
llvm-svn: 55476
 2008-08-28 17:47:37 +00:00
Owen Anderson 5f57bc2247 Add a helper method that will be used to support EXTRACT_SUBREG for selecting trunc's in fast-isel. 
llvm-svn: 55439
 2008-08-27 22:30:02 +00:00
Dan Gohman 61cfa3095d Fix FastISel's bitcast code for the case where getRegForValue fails. 
llvm-svn: 55431
 2008-08-27 20:41:38 +00:00
Owen Anderson 90609850b2 Use TargetLowering to get the types in fast isel, which handles pointer types correctly for our purposes. 
llvm-svn: 55428
 2008-08-27 18:58:30 +00:00
Dan Gohman d01789be23 Don't check TLI.getOperationAction. The FastISel way is to 
just try to do the action and let the tablegen-generated code
determine if there is target-support for an operation.

llvm-svn: 55427
 2008-08-27 18:15:05 +00:00
Dan Gohman b0b5a27438 Add a new FastISel method, getRegForValue, which takes care of 
the details of materializing constants and other values into
registers, and make use of it in several places.

llvm-svn: 55426
 2008-08-27 18:10:19 +00:00
Dan Gohman f2a6c1579f Add a comment about the current floating-point constant code in FastISel. 
llvm-svn: 55425
 2008-08-27 18:01:42 +00:00
Dan Gohman 5ca269e684 Basic FastISel support for floating-point constants. 
llvm-svn: 55401
 2008-08-27 01:09:54 +00:00
Owen Anderson 54aff7bb23 Fix handling of inttoptr and ptrtoint when unhandled operands are present. 
llvm-svn: 55400
 2008-08-27 00:35:37 +00:00
Owen Anderson 140549256f Add support for fast isel of inttoptr and ptrtoint in the cases where truncation is not needed. 
llvm-svn: 55399
 2008-08-27 00:31:01 +00:00
Owen Anderson ca1711a5b5 Factor out a large amoutn of the cast handling code in fast isel into helper methods. 
This simultaneously makes the code simpler and adds support for sext as well.

llvm-svn: 55398
 2008-08-26 23:46:32 +00:00
Owen Anderson 343310a715 Add support for fast isel of zext. 
llvm-svn: 55396
 2008-08-26 23:14:49 +00:00
Owen Anderson 655c1dc63d Add support for fptosi of constants in fast isel. 
llvm-svn: 55393
 2008-08-26 22:34:28 +00:00
Dan Gohman 6fda9208d9 Refactor the bitcast code into its own function. 
llvm-svn: 55387
 2008-08-26 21:28:54 +00:00
Dan Gohman b5e04bfb18 Make FastISel use the correct argument type when casting GEP indices. 
llvm-svn: 55384
 2008-08-26 20:57:08 +00:00
Dan Gohman 3bcbbece19 Don't select binary instructions with illegal types. 
llvm-svn: 55383
 2008-08-26 20:52:40 +00:00
Owen Anderson 3c4dc434ee Add support for fast isel of sitofp, and remove some unnecessary and imprecise legality checks. 
llvm-svn: 55381
 2008-08-26 20:37:00 +00:00
Owen Anderson e0ac9765b2 Use a combination of copyRegToReg and ISD::BIT_CONVERT when doing fast isel of bitcasts, 
allowing it to support the full range of conversions people might ask for in a correct manner.

llvm-svn: 55378
 2008-08-26 18:51:24 +00:00
Owen Anderson 27fb3dcbc7 Make TargetInstrInfo::copyRegToReg return a bool indicating whether the copy requested 
was inserted or not.  This allows bitcast in fast isel to properly handle the case
where an appropriate reg-to-reg copy is not available.

llvm-svn: 55375
 2008-08-26 18:03:31 +00:00
Owen Anderson bf05ebaccf Add support for fast isel of non-constant fptosi instructions. 
llvm-svn: 55373
 2008-08-26 17:44:42 +00:00
Owen Anderson 8dd01ccdd8 Add a RetVT parameter to emitted FastISel methods, so that we will be able to pass the desired return 
type down.  This is not currently used.

llvm-svn: 55345
 2008-08-25 23:58:18 +00:00
Evan Cheng 2c067325d6 Unbreak build. 
llvm-svn: 55342
 2008-08-25 22:20:39 +00:00
Owen Anderson 126afc5cb9 Expand bitcast support in fast isel to support bitcasts of non-constant values by emitting reg-reg copies. 
llvm-svn: 55340
 2008-08-25 21:32:34 +00:00
Owen Anderson 32635dbfb2 Add support for fast isel of (integer) immediate materialization pattens, and use them to support 
bitcast of constants in fast isel.

llvm-svn: 55325
 2008-08-25 20:20:32 +00:00
Dan Gohman 48a3623591 Make MBBMap a DenseMap instead of a std::map. 
llvm-svn: 55220
 2008-08-23 02:44:46 +00:00
Dan Gohman 2db3f8a095 Reapply r55191 and r55192. 
llvm-svn: 55205
 2008-08-22 21:28:19 +00:00
Bill Wendling fc4f64eed0 Reverting r55190, r55191, and r55192. They broke the build with this error message: 
{standard input}:17:bad register name `%sil'
make[4]: *** [libgcc/./_addvsi3.o] Error 1
make[4]: *** Waiting for unfinished jobs....
{standard input}:23:bad register name `%dil'
{standard input}:28:bad register name `%dil'
make[4]: *** [libgcc/./_addvdi3.o] Error 1
{standard input}:18:bad register name `%sil'
make[4]: *** [libgcc/./_subvsi3.o] Error 1

llvm-svn: 55200
 2008-08-22 20:51:05 +00:00
Dan Gohman 04968da460 Fix the InsertBranch call. 
llvm-svn: 55192
 2008-08-22 19:26:10 +00:00
Dan Gohman 87ff7058e7 Support non-fallthrough unconditional branches in FastISel. 
llvm-svn: 55191
 2008-08-22 19:21:41 +00:00
Dan Gohman a2292c0d34 Add FastISel support for PHINodes. Machine PHI nodes 
are not yet updated properly, but that's a separate
task.

llvm-svn: 55187
 2008-08-22 17:37:48 +00:00
Dan Gohman 49e19e906f Factor out the predicate check code from DAGISelEmitter.cpp 
and use it in FastISelEmitter.cpp, and make FastISel
subtarget aware. Among other things, this lets it work
properly on x86 targets that don't have SSE, where it
successfully selects x87 instructions.

llvm-svn: 55156
 2008-08-22 00:20:26 +00:00
Dan Gohman 6a7461ad9b Have FastISel skip the multiply by 1 for getelementptr on i8*. 
llvm-svn: 55129
 2008-08-21 17:37:05 +00:00
Dan Gohman efb7d2d03d MVT::getMVT uses iPTR for pointer types, while we need the actual 
intptr_t type in this case. FastISel can now select simple
getelementptr instructions.

llvm-svn: 55125
 2008-08-21 17:25:26 +00:00
Dan Gohman fe9056584b Basic fast-isel support for instructions with constant int operands. 
llvm-svn: 55099
 2008-08-21 01:41:07 +00:00
Evan Cheng 4b5c038cd0 Type of first GEP operand is always the same as the target pointer type. 
llvm-svn: 55097
 2008-08-21 01:19:11 +00:00
Dan Gohman 6a0780cdd7 Fix unused variable warnings. 
llvm-svn: 55089
 2008-08-20 23:53:10 +00:00