Alkis Evlogimenos [Sun, 25 Jul 2004 08:10:33 +0000 (08:10 +0000)]
Add some comments to the backtracking code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15200
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Chris Lattner [Sun, 25 Jul 2004 07:58:38 +0000 (07:58 +0000)]
Free instructions kill values too. This implements DeadStoreElim/free.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15199
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Chris Lattner [Sun, 25 Jul 2004 07:57:50 +0000 (07:57 +0000)]
New testcase for DSE
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15198
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Chris Lattner [Sun, 25 Jul 2004 07:57:37 +0000 (07:57 +0000)]
Add support for free instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15197
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Chris Lattner [Sun, 25 Jul 2004 07:47:25 +0000 (07:47 +0000)]
Fix the sense of joinable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15196
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Chris Lattner [Sun, 25 Jul 2004 07:34:00 +0000 (07:34 +0000)]
Remove linux/solaris specific stuff.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15195
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Chris Lattner [Sun, 25 Jul 2004 07:11:19 +0000 (07:11 +0000)]
This patch makes use of the infrastructure implemented before to safely and
aggressively coallesce live ranges even if they overlap. Consider this LLVM
code for example:
int %test(int %X) {
%Y = mul int %X, 1 ;; Codegens to Y = X
%Z = add int %X, %Y
ret int %Z
}
The mul is just there to get a copy into the code stream. This produces
this machine code:
(0x869e5a8, LLVM BB @0x869b9a0):
%reg1024 = mov <fi#-2>, 1, %NOREG, 0 ;; "X"
%reg1025 = mov %reg1024 ;; "Y" (subsumed by X)
%reg1026 = add %reg1024, %reg1025
%EAX = mov %reg1026
ret
Note that the life times of reg1024 and reg1025 overlap, even though they
contain the same value. This results in this machine code:
test:
mov %EAX, DWORD PTR [%ESP + 4]
mov %ECX, %EAX
add %EAX, %ECX
ret
Another, worse case involves loops and PHI nodes. Consider this trivial loop:
testcase:
int %test2(int %X) {
entry:
br label %Loop
Loop:
%Y = phi int [%X, %entry], [%Z, %Loop]
%Z = add int %Y, 1
%cond = seteq int %Z, 100
br bool %cond, label %Out, label %Loop
Out:
ret int %Z
}
Because of interactions between the PHI elimination pass and the register
allocator, this got compiled to this code:
test2:
mov %ECX, DWORD PTR [%ESP + 4]
.LBBtest2_1:
*** mov %EAX, %ECX
inc %EAX
cmp %EAX, 100
*** mov %ECX, %EAX
jne .LBBtest2_1
ret
Or on powerpc, this code:
_test2:
mflr r0
stw r0, 8(r1)
stwu r1, -60(r1)
.LBB_test2_1:
addi r2, r3, 1
cmpwi cr0, r2, 100
*** or r3, r2, r2
bne cr0, .LBB_test2_1
*** or r3, r2, r2
lwz r0, 68(r1)
mtlr r0
addi r1, r1, 60
blr 0
With this improvement in place, we now generate this code for these two
testcases, which is what we want:
test:
mov %EAX, DWORD PTR [%ESP + 4]
add %EAX, %EAX
ret
test2:
mov %EAX, DWORD PTR [%ESP + 4]
.LBBtest2_1:
inc %EAX
cmp %EAX, 100
jne .LBBtest2_1 # Loop
ret
Or on PPC:
_test2:
mflr r0
stw r0, 8(r1)
stwu r1, -60(r1)
.LBB_test2_1:
addi r3, r3, 1
cmpwi cr0, r3, 100
bne cr0, .LBB_test2_1
lwz r0, 68(r1)
mtlr r0
addi r1, r1, 60
blr 0
Static numbers for spill code loads/stores/reg-reg copies (smaller is better):
em3d: before: 47/25/26 after: 44/22/24
164.gzip: before: 433/245/310 after: 403/231/278
175.vpr: before: 3721/2189/1581 after: 4144/2081/1423
176.gcc: before: 26195/8866/9235 after: 25942/8082/8275
186.crafty: before: 4295/2587/3079 after: 4119/2519/2916
252.eon: before: 12754/7585/5803 after: 12508/7425/5643
256.bzip2: before: 463/226/315 after: 482:241/309
Runtime perf number samples on X86:
gzip: before: 41.09 after: 39.86
bzip2: runtime: before: 56.71s after: 57.07s
gcc: before: 6.16 after: 6.12
eon: before: 2.03s after: 2.00s
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15194
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Chris Lattner [Sun, 25 Jul 2004 06:23:01 +0000 (06:23 +0000)]
Make a method const, no functionality changes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15193
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Chris Lattner [Sun, 25 Jul 2004 06:19:04 +0000 (06:19 +0000)]
I think that V8 should coallesce registers, don't you?
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15192
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Alkis Evlogimenos [Sun, 25 Jul 2004 06:16:52 +0000 (06:16 +0000)]
Use name.empty() instead of testing against equality with the empty
string.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15191
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Alkis Evlogimenos [Sun, 25 Jul 2004 06:07:15 +0000 (06:07 +0000)]
Disallow creation of named values of type void.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15190
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Chris Lattner [Sun, 25 Jul 2004 05:45:18 +0000 (05:45 +0000)]
Fix a bug where we incorrectly value numbered the first PHI definition the
same as the PHI use. This is not correct as the PHI use value is different
depending on which branch is taken. This fixes espresso with aggressive
coallescing, and perhaps others.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15189
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Chris Lattner [Sun, 25 Jul 2004 05:43:53 +0000 (05:43 +0000)]
Fix a bug in the range remover
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15188
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Chris Lattner [Sun, 25 Jul 2004 03:24:11 +0000 (03:24 +0000)]
Add debugging output for joining assignments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15187
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Alkis Evlogimenos [Sat, 24 Jul 2004 18:55:15 +0000 (18:55 +0000)]
Remove implementation of operator= and make it private so that it is
not used accidentally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15172
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Alkis Evlogimenos [Sat, 24 Jul 2004 11:44:15 +0000 (11:44 +0000)]
Change std::map<unsigned, LiveInterval*> into a std::map<unsigned,
LiveInterval>. This saves some space and removes the pointer
indirection caused by following the pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15167
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Chris Lattner [Sat, 24 Jul 2004 07:53:26 +0000 (07:53 +0000)]
Finally give bugpoint -timeout support!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15163
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Chris Lattner [Sat, 24 Jul 2004 07:51:27 +0000 (07:51 +0000)]
obvious fix
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15162
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Chris Lattner [Sat, 24 Jul 2004 07:50:48 +0000 (07:50 +0000)]
Get rid of the printout from the low-level system interface
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15161
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Chris Lattner [Sat, 24 Jul 2004 07:49:11 +0000 (07:49 +0000)]
Pass timeouts into the low level "execute program with timeout" function
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15160
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Chris Lattner [Sat, 24 Jul 2004 07:48:50 +0000 (07:48 +0000)]
Provide timeout values to all abstract interpreters
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15159
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Chris Lattner [Sat, 24 Jul 2004 07:41:31 +0000 (07:41 +0000)]
Add support for killing the program if it executes for too long.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15158
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Chris Lattner [Sat, 24 Jul 2004 04:32:22 +0000 (04:32 +0000)]
whoops, didn't mean to remove this
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15157
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Chris Lattner [Sat, 24 Jul 2004 03:41:50 +0000 (03:41 +0000)]
In the joiner, merge the small interval into the large interval. This restores
us back to taking about 10.5s on gcc, instead of taking 15.6s! The net result
is that my big patches have hand no significant effect on compile time or code
quality. heh.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15156
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Chris Lattner [Sat, 24 Jul 2004 03:32:06 +0000 (03:32 +0000)]
Completely eliminate the intervals_ list. instead, the r2iMap_ maintains
ownership of the intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15155
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Chris Lattner [Sat, 24 Jul 2004 02:59:07 +0000 (02:59 +0000)]
Big change to compute logical value numbers for each LiveRange added to an
Interval. This generalizes the isDefinedOnce mechanism that we used before
to help us coallesce ranges that overlap. As part of this, every logical
range with a different value is assigned a different number in the interval.
For example, for code that looks like this:
0 X = ...
4 X += ...
...
N = X
We now generate a live interval that contains two ranges: [2,6:0),[6,?:1)
reflecting the fact that there are two different values in the range at
different positions in the code.
Currently we are not using this information at all, so this just slows down
liveintervals. In the future, this will change.
Note that this change also substantially refactors the joinIntervalsInMachineBB
method to merge the cases for virt-virt and phys-virt joining into a single
case, adds comments, and makes the code a bit easier to follow.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15154
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Chris Lattner [Sat, 24 Jul 2004 02:53:43 +0000 (02:53 +0000)]
Add a new differingRegisterClasses method
make overlapsAliases take pointers instead of references
fix indentation
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15153
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Chris Lattner [Sat, 24 Jul 2004 02:52:23 +0000 (02:52 +0000)]
Little stuff:
* Fix comment typeo
* add dump() methods
* add a few new methods like getLiveRangeContaining, removeRange & joinable
(which is currently the same as overlaps)
* Remove the unused operator==
Bigger change:
* In LiveInterval, instead of using a boolean isDefinedOnce to keep track of
if there are > 1 definitions in a particular interval, keep a counter,
NumValues to keep track of exactly how many there are.
* In LiveRange, add a new ValId element to indicate which of the numbered
values each LiveRange belongs to. We now no longer merge LiveRanges if
they are of differing value ID's even if they are neighbors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15152
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Misha Brukman [Fri, 23 Jul 2004 22:37:22 +0000 (22:37 +0000)]
Running list of bugs, unimplemented features, currently broken tests, until we
have a nightly tester set up for PowerPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15147
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Misha Brukman [Fri, 23 Jul 2004 22:35:49 +0000 (22:35 +0000)]
Eliminate spurious empty space; make code easier to page through.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15146
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Misha Brukman [Fri, 23 Jul 2004 21:43:26 +0000 (21:43 +0000)]
Simplify boolean test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15145
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Chris Lattner [Fri, 23 Jul 2004 21:24:19 +0000 (21:24 +0000)]
More minor changes:
* Inline some functions
* Eliminate some comparisons from the release build
This is good for another .3 on gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15144
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Misha Brukman [Fri, 23 Jul 2004 20:32:59 +0000 (20:32 +0000)]
Implement casting a floating point to 32-bit unsigned value
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15143
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Brian Gaeke [Fri, 23 Jul 2004 19:41:13 +0000 (19:41 +0000)]
bug fixed
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15142
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Chris Lattner [Fri, 23 Jul 2004 19:38:44 +0000 (19:38 +0000)]
Change addRange and join to be a little bit smarter. In particular, we don't
want to insert a new range into the middle of the vector, then delete ranges
one at a time next to the inserted one as they are merged.
Instead, if the inserted interval overlaps, just start merging. The only time
we insert into the middle of the vector is when we don't overlap at all. Also
delete blocks of live ranges if we overlap with many of them.
This patch speeds up joining by .7 seconds on a large testcase, but more
importantly gets all of the range adding code into addRangeFrom.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15141
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Brian Gaeke [Fri, 23 Jul 2004 19:35:50 +0000 (19:35 +0000)]
Fix problem with inserting FunctionPasses that depend on ImmutablePasses
(e.g., LICM) into FunctionPassManagers. The problem is that we were
using a C-style cast to cast required analysis passes to PassClass*, but
if it's a FunctionPassManager, and the required analysis pass is an
ImmutablePass, the types aren't really compatible, so the C-style cast
causes a crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15140
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Chris Lattner [Fri, 23 Jul 2004 18:40:00 +0000 (18:40 +0000)]
Search by the start point, not by the whole interval. This saves some
comparisons, reducing linscan by another .1 seconds :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15139
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Chris Lattner [Fri, 23 Jul 2004 18:39:12 +0000 (18:39 +0000)]
New helper method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15138
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Chris Lattner [Fri, 23 Jul 2004 18:38:52 +0000 (18:38 +0000)]
Speedup debug builds a bit
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15137
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Chris Lattner [Fri, 23 Jul 2004 18:13:24 +0000 (18:13 +0000)]
Instead of searching for a live interval pair, search for a location. This gives
a very modest speedup of .3 seconds compiling 176.gcc (out of 20s).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15136
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Chris Lattner [Fri, 23 Jul 2004 17:56:30 +0000 (17:56 +0000)]
Rename LiveIntervals.(cpp|h) -> LiveIntervalAnalysis.(cpp|h)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15135
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Chris Lattner [Fri, 23 Jul 2004 17:49:16 +0000 (17:49 +0000)]
Pull the LiveRange and LiveInterval classes out of LiveIntervals.h (which
will soon be renamed) into their own file. The new file should not emit
DEBUG output or have other side effects. The LiveInterval class also now
doesn't know whether its working on registers or some other thing.
In the future we will want to use the LiveInterval class and friends to do
stack packing. In addition to a code simplification, this will allow us to
do it more easily.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15134
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Misha Brukman [Fri, 23 Jul 2004 16:08:20 +0000 (16:08 +0000)]
* Codegen of GEPs dramatically improved by folding multiplies and adds
* Function pointers implemented correctly using appropriate stubs
Contributed by Nate Begeman.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15133
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John Criswell [Fri, 23 Jul 2004 15:40:57 +0000 (15:40 +0000)]
Revised the generation of files so that they follow the newer autoconf
standards. This is in hopes of fixing configuration problems on
Windows Services for Unix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15132
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Chris Lattner [Fri, 23 Jul 2004 08:24:23 +0000 (08:24 +0000)]
Improve comments a bit
Use an explicit LiveRange class to represent ranges instead of an std::pair.
This is a minor cleanup, but is really intended to make a future patch simpler
and less invasive.
Alkis, could you please take a look at LiveInterval::liveAt? I suspect that
you can add an operator<(unsigned) to LiveRange, allowing us to speed up the
upper_bound call by quite a bit (this would also apply to other callers of
upper/lower_bound). I would do it myself, but I still don't understand that
crazy liveAt function, despite the comment. :)
Basically I would like to see this:
LiveRange dummy(index, index+1);
Ranges::const_iterator r = std::upper_bound(ranges.begin(),
ranges.end(),
dummy);
Turn into:
Ranges::const_iterator r = std::upper_bound(ranges.begin(),
ranges.end(),
index);
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15130
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Chris Lattner [Fri, 23 Jul 2004 06:50:18 +0000 (06:50 +0000)]
Change column name
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15129
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Chris Lattner [Fri, 23 Jul 2004 05:27:43 +0000 (05:27 +0000)]
Update live intervals more accurately for PHI elim. This slightly reduces
the live intervals for some registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15125
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Chris Lattner [Fri, 23 Jul 2004 05:26:05 +0000 (05:26 +0000)]
Force coallescing of live ranges that have a single definition, even if they
interfere. Because these intervals have a single definition, and one of them
is a copy instruction, they are always safe to merge even if their lifetimes
interfere. This slightly reduces the amount of spill code, for example on
252.eon, from:
12837 spiller - Number of loads added
7604 spiller - Number of stores added
5842 spiller - Number of register spills
18155 liveintervals - Number of identity moves eliminated after coalescing
to:
12754 spiller - Number of loads added
7585 spiller - Number of stores added
5803 spiller - Number of register spills
18262 liveintervals - Number of identity moves eliminated after coalescing
The much much bigger win would be to merge intervals with multiple definitions
(aka phi nodes) but this is not that day.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15124
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Misha Brukman [Fri, 23 Jul 2004 01:30:49 +0000 (01:30 +0000)]
* Convert "\n" -> '\n'
* Print out another '\n' after printing out program execution status
* Make sure code wraps at 80 cols
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15123
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Misha Brukman [Fri, 23 Jul 2004 01:11:46 +0000 (01:11 +0000)]
Bool alignment on MacOSX/PowerPC is 4 bytes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15122
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Misha Brukman [Fri, 23 Jul 2004 01:11:19 +0000 (01:11 +0000)]
* Change class of BoolTy back to cInt
* Fix indentation back to 2 spaces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15121
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Misha Brukman [Fri, 23 Jul 2004 01:09:52 +0000 (01:09 +0000)]
* Add BoolAlignment to TargetData, default is 1 byte, size 1 byte
* Convert tabs to spaces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15120
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Misha Brukman [Fri, 23 Jul 2004 01:08:13 +0000 (01:08 +0000)]
* Add a BoolAlignment field to TargetData, default is 1 byte
* Fix spacing
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15119
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Chris Lattner [Thu, 22 Jul 2004 23:05:12 +0000 (23:05 +0000)]
costmetic changes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15118
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Misha Brukman [Thu, 22 Jul 2004 22:43:21 +0000 (22:43 +0000)]
Let's not get carried away here, please.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15117
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John Criswell [Thu, 22 Jul 2004 22:11:16 +0000 (22:11 +0000)]
Give some credit to Oscar. Should help to address Bug#13.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15116
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Chris Lattner [Thu, 22 Jul 2004 21:54:22 +0000 (21:54 +0000)]
Fix broken -debug printing
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15115
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Chris Lattner [Thu, 22 Jul 2004 21:46:02 +0000 (21:46 +0000)]
The default has not been 'simple' for AGES!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15114
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Chris Lattner [Thu, 22 Jul 2004 21:32:38 +0000 (21:32 +0000)]
Remove some abandoned code that was never finished. If needed in the future
it can be ressurected from CVS.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15113
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Chris Lattner [Thu, 22 Jul 2004 21:30:35 +0000 (21:30 +0000)]
Remove some (LARGE) abandoned code for the release. If this is ever needed
again in the future, it can be resurrected out of CVS
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15112
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Chris Lattner [Thu, 22 Jul 2004 18:42:00 +0000 (18:42 +0000)]
Make linear scan the default
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15111
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Misha Brukman [Thu, 22 Jul 2004 15:58:04 +0000 (15:58 +0000)]
* Change bool from cInt to cByte (for now)
* Don't allow negative immediates to users of unsigned immediates
* Fix long compares
* Support <const int>, op as a potential immediate candidate
* Fix sign extension of short and byte loads
* Fix and improve integer casts
* Fix passing of doubles as vararg functions
Patch contributed by Nate Begeman.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15109
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Alkis Evlogimenos [Thu, 22 Jul 2004 15:30:33 +0000 (15:30 +0000)]
Put variable name to a separate line.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15108
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Misha Brukman [Thu, 22 Jul 2004 15:26:23 +0000 (15:26 +0000)]
Fix indentation and wrap code at 80 cols
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15107
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Alkis Evlogimenos [Thu, 22 Jul 2004 15:18:10 +0000 (15:18 +0000)]
Sorting is now handled by both linearscan and iterative scan so live
intervals need not be sorted anymore. Removing this redundant step
improves LiveIntervals running time by 5% on 176.gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15106
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Alkis Evlogimenos [Thu, 22 Jul 2004 14:29:31 +0000 (14:29 +0000)]
Fit to 80 columns.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15105
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Chris Lattner [Thu, 22 Jul 2004 08:34:33 +0000 (08:34 +0000)]
Remove redundant SCCP pass
Add new DSE pass. Add a temporary option to disable it in case we need it
This is going in after the July 22 nightly tester run, so we'll wait until the 23rd to see it
:)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15104
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Alkis Evlogimenos [Thu, 22 Jul 2004 08:14:44 +0000 (08:14 +0000)]
Some compile time improvements resulting in a 1sec speedup in the 5sec
compilation of gcc:
* Use vectors instead of lists for the intervals sets
* Use a heap for the unhandled set to keep intervals always sorted and
makes insertions back to the heap very fast (compared to scanning a
list)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15103
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Chris Lattner [Thu, 22 Jul 2004 08:07:30 +0000 (08:07 +0000)]
New prototype
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15102
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Chris Lattner [Thu, 22 Jul 2004 08:00:28 +0000 (08:00 +0000)]
This is a trivial dead store elimination pass. It very very simple and
can be improved in many ways. But: stop laughing, even with -basicaa it
deletes 15% of the stores in 252.eon :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15101
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Chris Lattner [Thu, 22 Jul 2004 07:59:20 +0000 (07:59 +0000)]
Trivial testcase for dse
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15100
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Chris Lattner [Thu, 22 Jul 2004 07:58:18 +0000 (07:58 +0000)]
Clean up reference counting to stop "leaking" alias sets
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15099
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Chris Lattner [Thu, 22 Jul 2004 05:51:56 +0000 (05:51 +0000)]
Remove extraneous punctuation
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15098
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Chris Lattner [Thu, 22 Jul 2004 05:51:13 +0000 (05:51 +0000)]
Update GC intrinsics to take a pointer to the object as well as a pointer
to the field being updated. Patch contributed by Tobias Nurmiranta
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15097
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Chris Lattner [Thu, 22 Jul 2004 05:50:01 +0000 (05:50 +0000)]
Updates to gc intrinsics, contributed by Tobias Nurmiranta
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15096
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Chris Lattner [Thu, 22 Jul 2004 05:49:38 +0000 (05:49 +0000)]
Update documentation for gc intrinsics change. Contributed by
Tobias Nurmiranta
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15095
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Chris Lattner [Thu, 22 Jul 2004 05:48:38 +0000 (05:48 +0000)]
Update gc intrinsics to take pointer to object as well as pointer to field.
Patch contributed by Tobias Nurmiranta
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15094
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Alkis Evlogimenos [Thu, 22 Jul 2004 02:16:53 +0000 (02:16 +0000)]
Use reverse iterators when updating the vector, since scanning from
the end will reduce erase() runtimes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15093
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Chris Lattner [Thu, 22 Jul 2004 00:04:14 +0000 (00:04 +0000)]
That funny 2-address lowering pass can also cause multiple definitions,
fortunately, they are easy to handle if we know about them. This patch fixes
some serious pessimization of code produced by the linscan register allocator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15092
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Chris Lattner [Wed, 21 Jul 2004 23:17:57 +0000 (23:17 +0000)]
Minor cleanups
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15091
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Chris Lattner [Wed, 21 Jul 2004 21:28:26 +0000 (21:28 +0000)]
Fix cases where we generated horrible code like this:
mov %EDI, 12
add %EDI, %ECX
mov %ECX, 12
add %ECX, %EDX
mov %EDX, 12
add %EDX, %ESI
instead (really!) generate this:
add %ECX, 12
add %EDX, 12
add %ESI, 12
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15090
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Brian Gaeke [Wed, 21 Jul 2004 20:50:33 +0000 (20:50 +0000)]
These files don't need to include <iostream> since they include "Support/Debug.h".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15089
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Brian Gaeke [Wed, 21 Jul 2004 20:50:22 +0000 (20:50 +0000)]
Include <iostream> here, because most people using DEBUG() want to use std::cerr too.
This means that users of this file do not also need to include <iostream>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15088
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Misha Brukman [Wed, 21 Jul 2004 20:30:18 +0000 (20:30 +0000)]
* Add the lost fix to define the second reg of a 2-reg representation of longs
* Fix opcode RLWNM -> RLWINM since it uses an immediate const shift value
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15087
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Misha Brukman [Wed, 21 Jul 2004 20:22:06 +0000 (20:22 +0000)]
* Speed up canUseAsImmediateForOpcode() by comparing Operand before
dyn_cast<>ing and checking Constant's value
* Convert tabs to spaces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15086
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Chris Lattner [Wed, 21 Jul 2004 20:14:10 +0000 (20:14 +0000)]
* Further cleanup.
* Test for whether bits are shifted out during the optzn.
If so, the fold is illegal, though it can be handled explicitly for setne/seteq
This fixes the miscompilation of 254.gap last night, which was a latent bug
exposed by other optimizer improvements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15085
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Misha Brukman [Wed, 21 Jul 2004 20:11:11 +0000 (20:11 +0000)]
* Fix printing of signed immediate values (Nate Begeman)
* Fix printing of `zeroinitializer'
* Fix printing of `linkonce' globals, complete with stubs
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15084
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Misha Brukman [Wed, 21 Jul 2004 20:09:08 +0000 (20:09 +0000)]
* Fix printing of signed immediate values
* Generation of opcodes that take 16 bit immediates
* Rewrote multiply to be correct for 64 bit values
* Rewrote all the long handling to be correct for PowerPC
* Fix visitSelectInst() to define the upper register of the pair of regs
representing a long value
Patch contributed by Nate Begeman.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15083
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Chris Lattner [Wed, 21 Jul 2004 19:50:44 +0000 (19:50 +0000)]
Make cast-cast code a bit more defensive
"simplify" a bit of code for comparison/and folding
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15082
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Misha Brukman [Wed, 21 Jul 2004 19:36:57 +0000 (19:36 +0000)]
Use addSImm() instead of addImm() for stack offsets, which may be negative.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15081
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Misha Brukman [Wed, 21 Jul 2004 18:04:27 +0000 (18:04 +0000)]
Reid doesn't need a definite article in front of his name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15080
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Misha Brukman [Wed, 21 Jul 2004 18:02:43 +0000 (18:02 +0000)]
Delete extra space; add <p> tags around text within a <div>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15079
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Alkis Evlogimenos [Wed, 21 Jul 2004 17:23:44 +0000 (17:23 +0000)]
Fix analysis name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15078
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Misha Brukman [Wed, 21 Jul 2004 15:53:04 +0000 (15:53 +0000)]
Add SUBI instruction
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15077
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Misha Brukman [Wed, 21 Jul 2004 12:53:14 +0000 (12:53 +0000)]
Fix spelling of `iterative scan'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15075
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Misha Brukman [Wed, 21 Jul 2004 12:47:40 +0000 (12:47 +0000)]
* Uncomment rule for location of LLI (formerly commented out: typo?)
* Add space between VAR and `='
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15074
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Alkis Evlogimenos [Wed, 21 Jul 2004 12:00:10 +0000 (12:00 +0000)]
Clear spilled list at once. Remove unused vector.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15073
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Alkis Evlogimenos [Wed, 21 Jul 2004 09:46:55 +0000 (09:46 +0000)]
Change std::list into a std::vector for IntervalSets. This reduces
compile time for 176.gcc from 5.6 secs to 4.7 secs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15072
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Alkis Evlogimenos [Wed, 21 Jul 2004 08:38:06 +0000 (08:38 +0000)]
Add greater_ptr functor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15070
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Alkis Evlogimenos [Wed, 21 Jul 2004 08:28:39 +0000 (08:28 +0000)]
Improve file comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15069
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