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246 Commits

Author SHA1 Message Date
Chad Rosier c77830d21e [arm-fast-isel] Doublewords only require word-alignment. 
rdar://10528060

llvm-svn: 145891
 2011-12-06 01:44:17 +00:00
Bob Wilson 80381f6cbf Fix 80-column issues. 
llvm-svn: 145783
 2011-12-04 00:52:23 +00:00
Chad Rosier ec3b77e00d [arm-fast-isel] Unaligned stores of floats require special care. 
rdar://10510150

llvm-svn: 145742
 2011-12-03 02:21:57 +00:00
Nick Lewycky 50f02cb21b Move global variables in TargetMachine into new TargetOptions class. As an API 
change, now you need a TargetOptions object to create a TargetMachine. Clang
patch to follow.

One small functionality change in PTX. PTX had commented out the machine
verifier parts in their copy of printAndVerify. That now calls the version in
LLVMTargetMachine. Users of PTX who need verification disabled should rely on
not passing the command-line flag to enable it.

llvm-svn: 145714
 2011-12-02 22:16:29 +00:00
Chad Rosier 9fd0e55e91 [arm-fast-isel] After promoting a function parameter be sure to update the 
argument value type.  Otherwise, the sign/zero-extend has no effect on arguments
passed via the stack (i.e., undefined high-order bits).
rdar://10515467

llvm-svn: 145701
 2011-12-02 20:25:18 +00:00
Duncan Sands 12330650f8 Silence wrong warnings from GCC about variables possibly being used 
uninitialized: GCC doesn't understand that the variables are only used
if !UseImm, in which case they have been initialized.

llvm-svn: 145239
 2011-11-28 10:31:27 +00:00
Chad Rosier ee93ff736a Guard call to getRegForValue with isTypeLegal check to avoid unnecessary work/dead code. 
llvm-svn: 144959
 2011-11-18 01:17:34 +00:00
Chad Rosier 0eff3e5c21 Add TODO comment. 
llvm-svn: 144920
 2011-11-17 21:46:13 +00:00
Chad Rosier 15b2498e88 Dead code. 
llvm-svn: 144888
 2011-11-17 07:24:49 +00:00
Chad Rosier ce619ddfc5 Don't unconditionally set the kill flag. 
rdar://10456186

llvm-svn: 144872
 2011-11-17 01:16:53 +00:00
Chad Rosier 80979b6ea6 Check to make sure we can select the instruction before trying to put the 
operands into a register.  Otherwise, we may materialize dead code.

llvm-svn: 144805
 2011-11-16 18:39:44 +00:00
Chad Rosier af13d767a2 Add FIXME comment. 
llvm-svn: 144743
 2011-11-16 00:32:20 +00:00
Jay Foad 0745e645e0 Remove some unnecessary includes of PseudoSourceValue.h. 
llvm-svn: 144631
 2011-11-15 07:24:32 +00:00
Chad Rosier 057b6d3476 Supporting inline memmove isn't going to be worthwhile. The only way to avoid 
violating a dependency is to emit all loads prior to stores.  This would likely
cause a great deal of spillage offsetting any potential gains.

llvm-svn: 144585
 2011-11-14 23:04:09 +00:00
Chad Rosier ab7223e99a Add support for inlining small memcpys. 
rdar://10412592

llvm-svn: 144578
 2011-11-14 22:46:17 +00:00
Chad Rosier 45110fdf8d Fix a performance regression from r144565. Positive offsets were being lowered 
into registers, rather then encoded directly in the load/store.

llvm-svn: 144576
 2011-11-14 22:34:48 +00:00
Chad Rosier adfd200bcb Add support for Thumb load/stores with negative offsets. 
rdar://10412592

llvm-svn: 144565
 2011-11-14 20:22:27 +00:00
Chad Rosier 2a1df883d0 Add support for ARM halfword load/stores and signed byte loads with negative 
offsets.
rdar://10412592

llvm-svn: 144518
 2011-11-14 04:09:28 +00:00
Chad Rosier 1198d894d0 The order in which the predicate is added differs between Thumb and ARM mode. Fix predicate when in ARM mode and restore SelectIntrinsicCall. 
llvm-svn: 144494
 2011-11-13 09:44:21 +00:00
Chad Rosier a476e391f1 Temporarily disable SelectIntrinsicCall when in ARM mode. This is causing failures. 
llvm-svn: 144492
 2011-11-13 05:14:43 +00:00
Chad Rosier 5196efdf36 Fix comments. 
llvm-svn: 144490
 2011-11-13 04:25:02 +00:00
Chad Rosier c8cfd3a8fb Add support for emitting both signed- and zero-extend loads. Fix 
SimplifyAddress to handle either a 12-bit unsigned offset or the ARM +/-imm8
offsets (addressing mode 3).  This enables a load followed by an integer 
extend to be folded into a single load.

For example:
ldrb r1, [r0]       ldrb r1, [r0]
uxtb r2, r1     =>
mov  r3, r2         mov  r3, r1

llvm-svn: 144488
 2011-11-13 02:23:59 +00:00
Chad Rosier a7ebc5617d Add support in fast-isel for selecting memset/memcpy/memmove intrinsics. 
llvm-svn: 144426
 2011-11-11 23:31:03 +00:00
Chad Rosier e19b0a9eb8 Rename variables to avoid confusion. No functionallity change intended. 
llvm-svn: 144377
 2011-11-11 06:27:41 +00:00
Chad Rosier 7ddd63ce4e Add support for using immediates with select instructions. 
rdar://10412592

llvm-svn: 144376
 2011-11-11 06:20:39 +00:00
Chad Rosier 023ede5649 When loading a value, treat an i1 as an i8. 
llvm-svn: 144356
 2011-11-11 02:38:59 +00:00
Chad Rosier 2a3503e061 Add support for using MVN to materialize negative constants. 
rdar://10412592

llvm-svn: 144348
 2011-11-11 00:36:21 +00:00
Chad Rosier d1762e00e2 When in ARM mode, LDRH/STRH require special handling of negative offsets. 
For correctness, disable this for now.
rdar://10418009

llvm-svn: 144316
 2011-11-10 21:09:49 +00:00
Chad Rosier 3fbd094ad9 For immediate encodings of icmp, zero or sign extend first. Then 
determine if the value is negative and flip the sign accordingly.
rdar://10422026

llvm-svn: 144258
 2011-11-10 01:30:39 +00:00
Chad Rosier 2f27fab6ed The ARM LDRH/STRH instructions use a +/-imm8 encoding, not an imm12. 
rdar://10418009

llvm-svn: 144213
 2011-11-09 21:30:12 +00:00
Chad Rosier 595d419427 Add support for encoding immediates in icmp and fcmp. Hopefully, this will 
remove a fair number of unnecessary materialized constants.
rdar://10412592

llvm-svn: 144163
 2011-11-09 03:22:02 +00:00
Chad Rosier 0439cfc41f ARMFastISel doesn't support thumb1. Rename isThumb to isThumb2 to reflect this. 
No functional change intended.

llvm-svn: 144122
 2011-11-08 21:12:00 +00:00
Chad Rosier 5de1bea5c9 Enable support for returning i1, i8, and i16. Nothing special todo as it's the 
callee's responsibility to sign or zero-extend the return value.  The additional
test case just checks to make sure the calls are selected (i.e., -fast-isel-abort
doesn't assert).

llvm-svn: 144047
 2011-11-08 00:03:32 +00:00
Chad Rosier d0191a53c9 Add support for passing i1, i8, and i16 call parameters. Also, be sure to 
zero-extend the constant integer encoding.  Test case provides testing for
both call parameters and materialization of i1, i8, and i16 types.

llvm-svn: 143821
 2011-11-05 20:16:15 +00:00
Chad Rosier 5b8fdd7b62 Cannot create a result register for non-legal types. 
llvm-svn: 143749
 2011-11-04 23:45:39 +00:00
Chad Rosier e8b8b77307 When materializing an i32, SExt vs ZExt doesn't matter when we're trying to fit 
in a 16-bit immediate.  However, for the shorter non-legal types (i.e., i1, i8,
i16) we should not sign-extend.  This prevents us from materializing things
such as 'true' (i.e., i1 1).

llvm-svn: 143743
 2011-11-04 23:09:49 +00:00
Chad Rosier 67f96887aa Enable support for materializing i1, i8, and i16 integers via move immediate. 
llvm-svn: 143739
 2011-11-04 22:29:00 +00:00
Chad Rosier 8a98ec4d4b Indentation. 
llvm-svn: 143670
 2011-11-04 00:58:10 +00:00
Chad Rosier f3e73ad5da Add fast-isel support for returning i1, i8, and i16. 
llvm-svn: 143669
 2011-11-04 00:50:21 +00:00
Chad Rosier bf5f4bec1a Add support for sign-extending non-legal types in SelectSIToFP(). 
llvm-svn: 143603
 2011-11-03 02:04:59 +00:00
Chad Rosier 9cf803c4bf Add support for comparing integer non-legal types. 
llvm-svn: 143559
 2011-11-02 18:08:25 +00:00
Chad Rosier 4489f948a7 Factor out an EmitIntExt function. No functionality change intended. 
llvm-svn: 143547
 2011-11-02 17:20:24 +00:00
Chad Rosier ee7e452571 Factor out a SelectTrunc function. No functionality change intended. 
llvm-svn: 143523
 2011-11-02 00:18:48 +00:00
Chad Rosier d24e7e1d9b A branch predicated on a constant can just FastEmit an unconditional branch. 
llvm-svn: 143086
 2011-10-27 00:21:16 +00:00
Chad Rosier a486f44733 Add a TODO comment. FastISel works by parsing each basic block from the bottom 
up.  Thus, improving the support for compares is goodness because it increases
the number of terminator instructions we can handle.  This creates many more 
opportunities for target specific fast-isel.

llvm-svn: 143079
 2011-10-26 23:34:37 +00:00
Chad Rosier 78127d31f3 Factor a little more code into EmitCmp, which should have been done in the first 
place.  No functional change intended.

llvm-svn: 143078
 2011-10-26 23:25:44 +00:00
Chad Rosier eafbf3faa9 Use EmitCmp in SelectBranch. No functional change intended. 
llvm-svn: 143076
 2011-10-26 23:17:28 +00:00
Chad Rosier 59a201950b Factor out an EmitCmp function that can be used by both SelectCmp and 
SelectBranch.  No functional change intended.

llvm-svn: 143072
 2011-10-26 22:47:55 +00:00
Chad Rosier b522550ce5 Add a few FIXME comments. 
llvm-svn: 142299
 2011-10-17 22:54:23 +00:00
Bill Wendling 7753d66468 Switch over to using ARMConstantPoolConstant for global variables, functions, 
and block addresses.

llvm-svn: 140936
 2011-10-01 08:00:54 +00:00