Eli Friedman
41ce5b82da
A few more small things I've run into.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47702 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-28 00:21:43 +00:00
Evan Cheng
fd1074f171
This is done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47688 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-27 20:26:32 +00:00
Eli Friedman
a2e7efa6d3
A few minor updates, removing implemented stuff and adding a couple of
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new things.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47458 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21 21:16:49 +00:00
Chris Lattner
7c1687c196
Dan implemented one multiply issue. Replace it with another. :)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47431 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21 06:51:29 +00:00
Chris Lattner
92b416f64e
Add a note about sext from i1 plus flags use.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47278 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-18 18:30:13 +00:00
Chris Lattner
456012c72e
move PR2053 to here.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47237 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-17 19:43:57 +00:00
Andrew Lenharth
22c5c1b2df
llvm.memory.barrier, and impl for x86 and alpha
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47204 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-16 01:24:58 +00:00
Chris Lattner
eb05f90c71
upgrade some entries, remove stuff that is done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47109 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-14 06:19:02 +00:00
Chris Lattner
047ad94fc0
add a note, remove a done deed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45869 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-11 18:00:13 +00:00
Arnold Schwaighofer
c8ab8cde43
Improve tail call optimized call's argument lowering. Before this
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commit all arguments where moved to the stack slot where they would
reside on a normal function call before the lowering to the tail call
stack slot. This was done to prevent arguments overwriting each other.
Now only arguments sourcing from a FORMAL_ARGUMENTS node or a
CopyFromReg node with virtual register (could also be a caller's
argument) are lowered indirectly.
--This line, and those below, will be ignored--
M X86/X86ISelLowering.cpp
M X86/README.txt
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45867 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-11 16:49:42 +00:00
Chris Lattner
269f0595d6
add a testcase
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45768 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-09 00:37:18 +00:00
Chris Lattner
84a7c41251
add a note that is important for some fp apps.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45723 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07 21:59:58 +00:00
Chris Lattner
63079f0757
Fold comparisons against a constant nan, and optimize ORD/UNORD
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comparisons with a constant. This allows us to compile isnan to:
_foo:
fcmpu cr7, f1, f1
mfcr r2
rlwinm r3, r2, 0, 31, 31
blr
instead of:
LCPI1_0: ; float
.space 4
_foo:
lis r2, ha16(LCPI1_0)
lfs f0, lo16(LCPI1_0)(r2)
fcmpu cr7, f1, f0
mfcr r2
rlwinm r3, r2, 0, 31, 31
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45405 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 08:37:08 +00:00
Chris Lattner
69bfbdfaee
this xform is implemented.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45404 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 08:19:39 +00:00
Chris Lattner
112dedc520
avoid going through a stack slot to convert from fpstack to xmm reg
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if we are just going to store it back anyway. This improves things
like:
double foo();
void bar(double *P) { *P = foo(); }
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45399 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 06:41:28 +00:00
Chris Lattner
7ede51b964
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45397 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 05:51:58 +00:00
Chris Lattner
9bfcc624ba
add a note.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45387 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-28 21:50:40 +00:00
Chris Lattner
44cb8efdc1
add a simple hack
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45343 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-24 19:27:46 +00:00
Chris Lattner
4185b52183
add an obvious load folding missed optzn.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45161 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-18 16:48:14 +00:00
Chris Lattner
7d13015e32
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44637 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-05 22:58:19 +00:00
Chris Lattner
94613166b7
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44299 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-24 06:13:33 +00:00
Chris Lattner
253945899b
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43642 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 17:04:20 +00:00
Evan Cheng
402b678373
New entry.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43420 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-28 04:01:09 +00:00
Evan Cheng
2bd122c4d9
Loosen up iv reuse to allow reuse of the same stride but a larger type when truncating from the larger type to smaller type is free.
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e.g.
Turns this loop:
LBB1_1: # entry.bb_crit_edge
xorl %ecx, %ecx
xorw %dx, %dx
movw %dx, %si
LBB1_2: # bb
movl L_X$non_lazy_ptr, %edi
movw %si, (%edi)
movl L_Y$non_lazy_ptr, %edi
movw %dx, (%edi)
addw $4, %dx
incw %si
incl %ecx
cmpl %eax, %ecx
jne LBB1_2 # bb
into
LBB1_1: # entry.bb_crit_edge
xorl %ecx, %ecx
xorw %dx, %dx
LBB1_2: # bb
movl L_X$non_lazy_ptr, %esi
movw %cx, (%esi)
movl L_Y$non_lazy_ptr, %esi
movw %dx, (%esi)
addw $4, %dx
incl %ecx
cmpl %eax, %ecx
jne LBB1_2 # bb
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43375 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-26 01:56:11 +00:00
Arnold Schwaighofer
48abc5cf6b
Corrected many typing errors. And removed 'nest' parameter handling
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for fastcc from X86CallingConv.td. This means that nested functions
are not supported for calling convention 'fastcc'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42934 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-12 21:30:57 +00:00
Evan Cheng
1c5d83c14e
Update.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42922 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-12 18:22:55 +00:00
Arnold Schwaighofer
c85e1716f0
Added tail call optimization to the x86 back end. It can be
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enabled by passing -tailcallopt to llc. The optimization is
performed if the following conditions are satisfied:
* caller/callee are fastcc
* elf/pic is disabled OR
elf/pic enabled + callee is in module + callee has
visibility protected or hidden
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42870 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-11 19:40:01 +00:00
Dan Gohman
5bf88ebab9
This is done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42785 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-09 15:42:21 +00:00
Evan Cheng
57cce6c466
This is done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42656 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-05 22:34:59 +00:00
Chris Lattner
87b77b9079
add a note.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42607 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-04 15:47:27 +00:00
Chris Lattner
fce5cfe190
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42579 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-03 17:10:03 +00:00
Chris Lattner
67a1af9709
Bill's example is still not enough to repro this, but it has other issues that
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seem significant as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42564 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-03 03:40:24 +00:00
Bill Wendling
7687bd0b2b
Another micro-opt.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42554 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-02 21:49:31 +00:00
Bill Wendling
2bb6d459e6
Another missed optimization with LICM.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42552 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-02 21:43:06 +00:00
Bill Wendling
8d1c8ce3d8
Now with LL code!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42547 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-02 20:54:32 +00:00
Bill Wendling
6aab4910cd
Another missed optimization.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42546 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-02 20:42:59 +00:00
Chris Lattner
1efa1696e3
move PR1160 here.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42347 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-26 06:29:31 +00:00
Evan Cheng
f618e7c2a1
New entry.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41810 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 22:16:37 +00:00
Chris Lattner
bf8ae84a21
Add some notes about better flag handling.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41808 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 21:43:18 +00:00
Chris Lattner
9e43d6316f
add some notes on really poor codegen.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41319 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-23 15:22:07 +00:00
Chris Lattner
cf8ba696b3
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41178 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-20 02:14:33 +00:00
Chris Lattner
ace2e8ad0c
expand a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41021 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-11 18:19:07 +00:00
Chris Lattner
384f4a94f8
With evan's explicit flag representation, hopefully we will finally be
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able to 3-addressify away stuff like this:
movl %ecx, %eax
decl %eax
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41020 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-11 18:16:46 +00:00
Christopher Lamb
a1eb155e52
Use subregs to improve any_extend code generation when feasible.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41013 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 22:22:41 +00:00
Christopher Lamb
c59e52108b
Increase efficiency of sign_extend_inreg by using subregisters for truncation. As the README suggests sign_extend_subreg is selected to (sext(trunc)).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41010 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 21:48:46 +00:00
Christopher Lamb
6f41435879
Edit README in light of previous LEA16 commit.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41009 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 21:29:05 +00:00
Chris Lattner
107f54a002
add an observation
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40772 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-03 00:17:42 +00:00
Evan Cheng
7e7bbf8271
Only adjust esp around calls in presence of alloca.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40028 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-19 00:42:05 +00:00
Evan Cheng
b5cd24973c
New entry.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39998 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-18 08:21:49 +00:00
Evan Cheng
698b63862c
Update.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39977 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-17 18:39:45 +00:00