2a3be7bb6c
Move even more functionality from MRegisterInfo into TargetInstrInfo.
...
Some day I'll get it all moved over...
llvm-svn: 45672
2008-01-07 01:35:02 +00:00
2d684b1fbf
Ammending r45669 with a missing file.
...
llvm-svn: 45671
2008-01-07 01:33:09 +00:00
6047b6e140
With this patch, the LowerGC transformation becomes the
...
ShadowStackCollector, which additionally has reduced overhead with
no sacrifice in portability.
Considering a function @fun with 8 loop-local roots,
ShadowStackCollector introduces the following overhead
(x86):
; shadowstack prologue
movl L_llvm_gc_root_chain$non_lazy_ptr, %eax
movl (%eax), %ecx
movl $___gc_fun, 20(%esp)
movl $0, 24(%esp)
movl $0, 28(%esp)
movl $0, 32(%esp)
movl $0, 36(%esp)
movl $0, 40(%esp)
movl $0, 44(%esp)
movl $0, 48(%esp)
movl $0, 52(%esp)
movl %ecx, 16(%esp)
leal 16(%esp), %ecx
movl %ecx, (%eax)
; shadowstack loop overhead
(none)
; shadowstack epilogue
movl 48(%esp), %edx
movl %edx, (%ecx)
; shadowstack metadata
.align 3
___gc_fun: # __gc_fun
.long 8
.space 4
In comparison to LowerGC:
; lowergc prologue
movl L_llvm_gc_root_chain$non_lazy_ptr, %eax
movl (%eax), %ecx
movl %ecx, 48(%esp)
movl $8, 52(%esp)
movl $0, 60(%esp)
movl $0, 56(%esp)
movl $0, 68(%esp)
movl $0, 64(%esp)
movl $0, 76(%esp)
movl $0, 72(%esp)
movl $0, 84(%esp)
movl $0, 80(%esp)
movl $0, 92(%esp)
movl $0, 88(%esp)
movl $0, 100(%esp)
movl $0, 96(%esp)
movl $0, 108(%esp)
movl $0, 104(%esp)
movl $0, 116(%esp)
movl $0, 112(%esp)
; lowergc loop overhead
leal 44(%esp), %eax
movl %eax, 56(%esp)
leal 40(%esp), %eax
movl %eax, 64(%esp)
leal 36(%esp), %eax
movl %eax, 72(%esp)
leal 32(%esp), %eax
movl %eax, 80(%esp)
leal 28(%esp), %eax
movl %eax, 88(%esp)
leal 24(%esp), %eax
movl %eax, 96(%esp)
leal 20(%esp), %eax
movl %eax, 104(%esp)
leal 16(%esp), %eax
movl %eax, 112(%esp)
; lowergc epilogue
movl 48(%esp), %edx
movl %edx, (%ecx)
; lowergc metadata
(none)
llvm-svn: 45670
2008-01-07 01:30:53 +00:00
5180e85675
Enabling the target-independent garbage collection infrastructure by hooking it
...
up to the various compiler pipelines.
This doesn't actually add support for any GC algorithms, which means it
temporarily breaks a few tests. To be fixed shortly.
llvm-svn: 45669
2008-01-07 01:30:38 +00:00
b296b0f1c1
The pic base can't be duplicated.
...
llvm-svn: 45668
2008-01-06 23:49:32 +00:00
a4ce4f6987
rename isLoad -> isSimpleLoad due to evan's desire to have such a predicate.
...
llvm-svn: 45667
2008-01-06 23:38:27 +00:00
4d3b0f579c
rearrange some code.
...
llvm-svn: 45666
2008-01-06 22:50:31 +00:00
e2949f42d3
some simplifications/cleanups to ?: sema.
...
llvm-svn: 45665
2008-01-06 22:42:25 +00:00
cfb6f430b6
Emit warnings like "dereferencing void pointer" instead of trying to
...
pretty print the type name for void.
llvm-svn: 45664
2008-01-06 22:21:46 +00:00
db911e9037
Modify Makefile.rules to allow makefiles to prepend to C.Flags and
...
fiends. Change Makefile.ocaml to not touch CFLAGS.
llvm-svn: 45663
2008-01-06 21:54:35 +00:00
2a1993fb2c
improve description of alignment, patch by Alain Frisch.
...
llvm-svn: 45662
2008-01-06 21:04:43 +00:00
ec56402557
Fix typo noticed by 'Danny' in PR1901
...
llvm-svn: 45661
2008-01-06 19:51:52 +00:00
466e8ebcc7
back out accidental commit.
...
llvm-svn: 45660
2008-01-06 19:19:32 +00:00
460d863ba5
fix an accidental commit that broke all the testers :(
...
llvm-svn: 45659
2008-01-06 19:18:52 +00:00
404eb05247
The transform that tries to turn calls to bitcast functions into
...
direct calls bails out unless caller and callee have essentially
equivalent parameter attributes. This is illogical - the callee's
attributes should be of no relevance here. Rework the logic, which
incidentally fixes a crash when removed arguments have attributes.
llvm-svn: 45658
2008-01-06 18:27:01 +00:00
55e5090fe8
When transforming a call to a bitcast function into
...
a direct call with cast parameters and cast return
value (if any), instcombine was prepared to cast any
non-void return value into any other, whether castable
or not. Add a new predicate for testing whether casting
is valid, and check it both for the return value and
(as a cleanup) for the parameters.
llvm-svn: 45657
2008-01-06 10:12:28 +00:00
10324d0175
rename isStore -> mayStore to more accurately reflect what it captures.
...
llvm-svn: 45656
2008-01-06 08:36:04 +00:00
1694a53c5d
Remove an unused variable.
...
llvm-svn: 45655
2008-01-06 07:43:13 +00:00
a348f55ec6
Change the 'isStore' inferrer to look for 'SDNPMayStore'
...
instead of "ISD::STORE". This allows us to mark target-specific dag
nodes as storing (such as ppc byteswap stores). This allows us to remove
more explicit isStore flags from the .td files.
Finally, add a warning for when a .td file contains an explicit
isStore and tblgen is able to infer it.
llvm-svn: 45654
2008-01-06 06:44:58 +00:00
f4d55ec4e8
remove explicit isStore flags that are now inferrable.
...
llvm-svn: 45653
2008-01-06 05:55:01 +00:00
e20f380fbf
remove some isStore flags that are now inferred automatically.
...
llvm-svn: 45652
2008-01-06 05:53:26 +00:00
e9dba0920b
describe isStore and simplify the implementation of hasUnmodelledSideEffects.
...
No functionality change.
llvm-svn: 45651
2008-01-06 05:43:21 +00:00
89c6566577
set the 'isstore' flag for instructions whose pattern is an
...
intrinsic that writes to memory.
llvm-svn: 45650
2008-01-06 05:36:50 +00:00
0e519bb555
Accept both %y, %x and %x, %y as valid answers.
...
llvm-svn: 45649
2008-01-06 03:12:44 +00:00
e457fd1e9b
remove some old hacky code that tried to infer whether a store
...
occured in a pattern, but failed miserably. The new code works for
any instruction that has a store in its pattern, including all the
x86 mem op mem instructions.
The only target-independent code that uses this is branch folding,
so this won't change anything in practice.
llvm-svn: 45648
2008-01-06 02:16:26 +00:00
27a4c1515a
rearrange some code to allow inferring instr info from the pattern of the instr, but don't do so yet.
...
llvm-svn: 45647
2008-01-06 01:53:37 +00:00
d5326def4a
improve const correctness.
...
llvm-svn: 45646
2008-01-06 01:52:22 +00:00
ea2d52d867
Split the impl of CodeGenInstruction out to its own .cpp file, add a getName() accessor.
...
llvm-svn: 45645
2008-01-06 01:35:39 +00:00
85467a17ae
final cleanups.
...
llvm-svn: 45644
2008-01-06 01:21:51 +00:00
626b89daa4
further simplifications and cleanup
...
llvm-svn: 45643
2008-01-06 01:20:13 +00:00
827efa451f
simplify some code
...
llvm-svn: 45642
2008-01-06 01:12:44 +00:00
ab3242fd46
rename CodegenDAGPatterns -> CodeGenDAGPatterns
...
llvm-svn: 45641
2008-01-06 01:10:31 +00:00
e59a3c79e5
split enum emission out from InstrInfoEmitter into it's own tblgen backend.
...
llvm-svn: 45640
2008-01-06 00:49:05 +00:00
78ac0747e7
fix build on case sensitive file systems.
...
llvm-svn: 45639
2008-01-05 23:37:52 +00:00
5fa2c64b78
Fix comment.
...
llvm-svn: 45638
2008-01-05 23:30:51 +00:00
7eac714b41
make this build with newer gcc's
...
llvm-svn: 45637
2008-01-05 23:29:51 +00:00
7980bba549
now that computing CodegenDAGPatterns doesn't implicitly print stuff
...
out, DAGISelEmitter can compute it in its ctor, which simplifies some code.
Now we can use CodegenDAGPatterns in other parts of tblgen that want access
to dag pattern info, woo!
llvm-svn: 45636
2008-01-05 22:58:54 +00:00
cc43e79bcd
move Node Transformation printing from CodeGenDAGPatterns -> DAGISelEmitter.
...
The only difference in output is that we now print them in alphabetical
order instead of reverse alphabetical order.
llvm-svn: 45635
2008-01-05 22:54:53 +00:00
e7170df043
move predicate printing code from CodeGenDAGPatterns -> DAGISelEmitter.
...
llvm-svn: 45634
2008-01-05 22:43:57 +00:00
9abe77b2d0
fix a fixme by improving const correctness.
...
llvm-svn: 45633
2008-01-05 22:30:17 +00:00
8cab021ca2
change getQualifiedName to be a global function.
...
Split the pattern parsing code out from the dag isel emitter into it's own file.
No functionality change.
llvm-svn: 45632
2008-01-05 22:25:12 +00:00
22950d26f5
Remove an incorrect optimization that is performed correctly by
...
the target independent legalizer.
llvm-svn: 45631
2008-01-05 20:51:30 +00:00
5743da502e
If custom lowering of insert element fails, the result Val will be 0.
...
Don't overwrite a variable used by the fallthrough code path in this
case.
llvm-svn: 45630
2008-01-05 20:47:37 +00:00
647e61a42b
Fix build issue on certain compilers.
...
llvm-svn: 45629
2008-01-05 20:15:42 +00:00
9231958391
Refactoring the x86 and x86-64 calling convention implementations,
...
unifying the copied algorithms and saving over 500 LOC. There should
be no functionality change, but please test on your favorite x86
target.
llvm-svn: 45627
2008-01-05 16:56:59 +00:00
be984cf10b
Chris and Evan noticed that this check was compleatly fubared. I was
...
checking that there was a from a global instead of a load from the stub
for a global, which is the one that's safe to hoist.
Consider this program:
volatile char G[100];
int B(char *F, int N) {
for (; N > 0; --N)
F[N] = G[N];
}
In static mode, we shouldn't be hoisting the load from G:
$ llc -relocation-model=static -o - a.bc -march=x86 -machine-licm
LBB1_1: # bb.preheader
leal -1(%eax), %edx
testl %edx, %edx
movl $1, %edx
cmovns %eax, %edx
xorl %esi, %esi
LBB1_2: # bb
movb _G(%eax), %bl
movb %bl, (%ecx,%eax)
llvm-svn: 45626
2008-01-05 09:18:04 +00:00
ee61d14bf6
The current impl is really trivial, add some comments about how it can be made better.
...
llvm-svn: 45625
2008-01-05 06:47:58 +00:00
276178e49f
allow sinking to be enabled for the jit
...
llvm-svn: 45624
2008-01-05 06:14:16 +00:00
e0f0c4aa02
enable sinking and licm of loads from the argument area. I'd like to enable this
...
for remat, but can't due to an RA bug.
llvm-svn: 45623
2008-01-05 06:10:42 +00:00
d4738ee8e1
simplify some code by using shorter accessors.
...
llvm-svn: 45622
2008-01-05 05:28:30 +00:00
Owen Anderson