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32 Commits

Author SHA1 Message Date
Bob Wilson
505ddaa4dc Remove isProfitableToDuplicateIndirectBranch target hook. It is profitable 
for all the processors where I have tried it, and even when it might not help
performance, the cost is quite low.  The opportunities for duplicating
indirect branches are limited by other factors so code size does not change
much due to tail duplicating indirect branches aggressively.

llvm-svn: 90144
 2009-11-30 18:35:03 +00:00
Anton Korobeynikov
2522908653 Materialize global addresses via movt/movw pair, this is always better 
than doing the same via constpool:
1. Load from constpool costs 3 cycles on A9, movt/movw pair - just 2.
2. Load from constpool might stall up to 300 cycles due to cache miss.
3. Movt/movw does not use load/store unit.
4. Less constpool entries => better compiler performance.

This is only enabled on ELF systems, since darwin does not have needed
relocations (yet).

llvm-svn: 89720
 2009-11-24 00:44:37 +00:00
Bob Wilson
290e9a47a9 Add a target hook to allow changing the tail duplication limit based on the 
contents of the block to be duplicated.  Use this for ARM Cortex A8/9 to
be more aggressive tail duplicating indirect branches, since it makes it
much more likely that they will be predicted in the branch target buffer.
Testcase coming soon.

llvm-svn: 89187
 2009-11-18 03:34:27 +00:00
David Goodwin
b9fe5d5d02 Allow target to specify regclass for which antideps will only be broken along the critical path. 
llvm-svn: 88682
 2009-11-13 19:52:48 +00:00
David Goodwin
0d412c2528 Fixed to address code review. No functional changes. 
llvm-svn: 86634
 2009-11-10 00:48:55 +00:00
Evan Cheng
343d17d762 I am no spelling bee. 
llvm-svn: 84250
 2009-10-16 06:18:09 +00:00
Evan Cheng
03da4dba59 Enable post-alloc scheduling for all ARM variants except for Thumb1. 
llvm-svn: 84249
 2009-10-16 06:11:08 +00:00
Evan Cheng
8cd7c92613 Add comment. 
llvm-svn: 84246
 2009-10-16 05:33:58 +00:00
David Goodwin
1cc6dd97da Remove neonfp attribute and instead set default based on CPU string. Add -arm-use-neon-fp to override the default. 
llvm-svn: 83218
 2009-10-01 22:19:57 +00:00
David Goodwin
9a051a5922 Restore the -post-RA-scheduler flag as an override for the target specification. Remove -mattr for setting PostRAScheduler enable and instead use CPU string. 
llvm-svn: 83215
 2009-10-01 21:46:35 +00:00
David Goodwin
17199b56b0 Remove -post-RA-schedule flag and add a TargetSubtarget method to enable post-register-allocation scheduling. By default it is off. For ARM, enable/disable with -mattr=+/-postrasched. Enable by default for cortex-a8. 
llvm-svn: 83122
 2009-09-30 00:10:16 +00:00
Evan Cheng
1b38952c99 Reference to hidden symbols do not have to go through non-lazy pointer in non-pic mode. rdar://7187172. 
llvm-svn: 80904
 2009-09-03 07:04:02 +00:00
Evan Cheng
43b9ca6f42 Let Darwin linker auto-synthesize stubs and lazy-pointers. This deletes a bunch of nasty code in ARM asm printer. 
llvm-svn: 80404
 2009-08-28 23:18:09 +00:00
Daniel Dunbar
4cc1feff4f Remove some dead code. 
llvm-svn: 78219
 2009-08-05 18:12:37 +00:00
David Goodwin
3b9c52c5c1 Initial support for single-precision FP using NEON. Added "neonfp" attribute to enable. Added patterns for some binary FP operations. 
llvm-svn: 78081
 2009-08-04 17:53:06 +00:00
Daniel Dunbar
31b44e8f6c Normalize Subtarget constructors to take a target triple string instead of 
Module*.

Also, dropped uses of TargetMachine where unnecessary. The only target which
still takes a TargetMachine& is Mips, I would appreciate it if someone would
normalize this to match other targets.

llvm-svn: 77918
 2009-08-02 22:11:08 +00:00
Evan Cheng
6ab54fdb0a Fix Thumb2 function call isel. Thumb1 and Thumb2 should share the same 
instructions for calls since BL and BLX are always 32-bit long and BX is always
16-bit long.

Also, we should be using BLX to call external function stubs.

llvm-svn: 77756
 2009-08-01 00:16:10 +00:00
Bob Wilson
482495695e Use thumb2 for ARM architectures V6T2 and later. Fix a bug in checking 
for "thumb" and add a check for V6T2.

llvm-svn: 73905
 2009-06-22 21:28:22 +00:00
Bob Wilson
4582530a2c For Darwin on ARMv6 and newer, make register r9 available for use as a 
caller-saved register.

llvm-svn: 73901
 2009-06-22 21:01:46 +00:00
Evan Cheng
a0ca298f8a Remove UseThumbBacktraces. Just check if subtarget is darwin. 
llvm-svn: 73734
 2009-06-18 23:14:30 +00:00
Anton Korobeynikov
77d1943637 The attached patches implement most of the ARM AAPCS-VFP hard float 
ABI. The missing piece is support for putting "homogeneous aggregates"
into registers.

Patch by Sandeep Patel!

llvm-svn: 73095
 2009-06-08 22:53:56 +00:00
Anton Korobeynikov
12694bd8ac Implement review feedback. Make thumb2 'normal' subtarget feature 
llvm-svn: 72698
 2009-06-01 20:00:48 +00:00
Anton Korobeynikov
b6f4538683 Add placeholder for thumb2 stuff 
llvm-svn: 72593
 2009-05-29 23:41:08 +00:00
Anton Korobeynikov
0b91cc4260 Add ARMv7 architecture, Cortex processors and different FPU modes handling. 
llvm-svn: 72337
 2009-05-23 19:51:43 +00:00
Anton Korobeynikov
08bf4c0f5a Propagate CPU string out of SubtargetFeatures 
llvm-svn: 72335
 2009-05-23 19:50:50 +00:00
Evan Cheng
0ee0da841d ARM target now also recognize triplets like thumbv6-apple-darwin and set thumb mode and arch subversion. Eventually thumb triplets will go way and replaced with function notes. 
llvm-svn: 66435
 2009-03-09 20:25:39 +00:00
Evan Cheng
ec415efb44 Recognize triplets starting with armv5-, armv6- etc. And set the ARM arch version accordingly. 
llvm-svn: 66365
 2009-03-08 04:02:49 +00:00
Chris Lattner
f3ebc3f3d2 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Evan Cheng
9f8301413c Added -march=thumb; removed -enable-thumb. 
llvm-svn: 34521
 2007-02-23 03:14:31 +00:00
Lauro Ramos Venancio
048e16ff8f Add ABI information to ARM subtarget. 
llvm-svn: 34245
 2007-02-13 19:52:28 +00:00
Evan Cheng
181fe36d6c Introduce TargetType's ELF and Darwin. 
llvm-svn: 33363
 2007-01-19 19:22:40 +00:00
Evan Cheng
10043e215b ARM backend contribution from Apple. 
llvm-svn: 33353
 2007-01-19 07:51:42 +00:00