Chris Lattner
2755fb4171
Alpha doesn't have a native f32 extload instruction.
...
llvm-svn: 19880
2005-01-28 22:58:25 +00:00
Chris Lattner
da7b5277c1
implement legalization of truncates whose results and sources need to be
...
truncated, e.g. (truncate:i8 something:i16) on a 32 or 64-bit RISC.
llvm-svn: 19879
2005-01-28 22:52:50 +00:00
Chris Lattner
89cac82479
Get alpha working with memset/memcpy/memmove
...
llvm-svn: 19878
2005-01-28 22:29:18 +00:00
Chris Lattner
4134789c8f
CopyFromReg produces two values. Make sure that we remember that both are
...
legalized, and actually return the correct result when we legalize the chain first.
llvm-svn: 19866
2005-01-28 06:27:38 +00:00
Chris Lattner
849899e193
Silence optimized warnings.
...
llvm-svn: 19797
2005-01-23 23:19:44 +00:00
Chris Lattner
b3a5fc3ec0
Adjust to changes in SelectionDAG interfaces
...
The first half of correct chain insertion for libcalls. This is not enough
to fix Fhourstones yet though.
llvm-svn: 19781
2005-01-23 04:42:50 +00:00
Chris Lattner
3165569ba9
Remove the 3 HACK HACK HACKs I put in before, fixing them properly with
...
the new TLI that is available.
Implement support for handling out of range shifts. This allows us to
compile this code (a 64-bit rotate):
unsigned long long f3(unsigned long long x) {
return (x << 32) | (x >> (64-32));
}
into this:
f3:
mov %EDX, DWORD PTR [%ESP + 4]
mov %EAX, DWORD PTR [%ESP + 8]
ret
GCC produces this:
$ gcc t.c -masm=intel -O3 -S -o - -fomit-frame-pointer
..
f3:
push %ebx
mov %ebx, DWORD PTR [%esp+12]
mov %ecx, DWORD PTR [%esp+8]
mov %eax, %ebx
mov %edx, %ecx
pop %ebx
ret
The Simple ISEL produces (eww gross):
f3:
sub %ESP, 4
mov DWORD PTR [%ESP], %ESI
mov %EDX, DWORD PTR [%ESP + 8]
mov %ECX, DWORD PTR [%ESP + 12]
mov %EAX, 0
mov %ESI, 0
or %EAX, %ECX
or %EDX, %ESI
mov %ESI, DWORD PTR [%ESP]
add %ESP, 4
ret
llvm-svn: 19780
2005-01-23 04:39:44 +00:00
Chris Lattner
4c997d281c
Adjust to changes in SelectionDAG interface.
...
llvm-svn: 19779
2005-01-23 04:36:26 +00:00
Chris Lattner
63ec3c402b
Get this to work for 64-bit systems.
...
llvm-svn: 19763
2005-01-22 23:04:37 +00:00
Chris Lattner
97f35a7a07
More bugfixes for IA64 shifts.
...
llvm-svn: 19739
2005-01-22 00:33:03 +00:00
Chris Lattner
67deea9d05
Fix problems with non-x86 targets.
...
llvm-svn: 19738
2005-01-22 00:31:52 +00:00
Chris Lattner
42e239ed58
Add a nasty hack to fix Alpha/IA64 multiplies by a power of two.
...
llvm-svn: 19737
2005-01-22 00:20:42 +00:00
Chris Lattner
e724100870
Remove unneeded line.
...
llvm-svn: 19736
2005-01-21 23:43:12 +00:00
Chris Lattner
a974e215a5
test commit
...
llvm-svn: 19735
2005-01-21 23:38:56 +00:00
Chris Lattner
392ddf430b
Unary token factor nodes are unneeded.
...
llvm-svn: 19727
2005-01-21 18:01:22 +00:00
Chris Lattner
07c35617d5
Refactor libcall code a bit. Initial implementation of expanding int -> FP
...
operations for 64-bit integers.
llvm-svn: 19724
2005-01-21 06:05:23 +00:00
Chris Lattner
6258ec2e1d
Simplify the shift-expansion code.
...
llvm-svn: 19721
2005-01-20 20:29:23 +00:00
Chris Lattner
c95c7c90c9
Expand add/sub into ADD_PARTS/SUB_PARTS instead of a non-existant libcall.
...
llvm-svn: 19715
2005-01-20 18:52:28 +00:00
Chris Lattner
4086a7a803
implement add_parts/sub_parts.
...
llvm-svn: 19714
2005-01-20 18:50:55 +00:00
Chris Lattner
e5212a16a2
Support targets that do not use i8 shift amounts.
...
llvm-svn: 19707
2005-01-19 22:31:21 +00:00
Chris Lattner
c662697319
Add support for targets that pass args in registers to calls.
...
llvm-svn: 19703
2005-01-19 20:24:35 +00:00
Chris Lattner
277ac2be70
Fold single use token factor nodes into other token factor nodes.
...
llvm-svn: 19701
2005-01-19 19:10:54 +00:00
Chris Lattner
85e0771f79
Realize the individual pieces of an expanded copytoreg/store/load are
...
independent of each other.
llvm-svn: 19700
2005-01-19 18:02:17 +00:00
Chris Lattner
027c97e93e
Know some identities about tokenfactor nodes.
...
llvm-svn: 19699
2005-01-19 18:01:40 +00:00
Chris Lattner
7114e8a527
Know some simple identities. This improves codegen for (1LL << N).
...
llvm-svn: 19698
2005-01-19 17:29:49 +00:00
Chris Lattner
743a36c818
Implement a way of expanding shifts. This applies to targets that offer
...
select operations or to shifts that are by a constant. This automatically
implements (with no special code) all of the special cases for shift by 32,
shift by < 32 and shift by > 32.
llvm-svn: 19679
2005-01-19 04:19:40 +00:00
Chris Lattner
0df1935505
Zero is cheaper than sign extend.
...
llvm-svn: 19675
2005-01-18 21:57:59 +00:00
Chris Lattner
4360871e16
Fix some fixmes (promoting bools for select and brcond), fix promotion
...
of zero and sign extends.
llvm-svn: 19671
2005-01-18 19:27:06 +00:00
Chris Lattner
eea485de1f
Keep track of the retval type as well.
...
llvm-svn: 19670
2005-01-18 19:26:36 +00:00
Chris Lattner
ff086f3016
Teach legalize to promote copy(from|to)reg, instead of making the isel pass
...
do it. This results in better code on X86 for floats (because if strict
precision is not required, we can elide some more expensive double -> float
conversions like the old isel did), and allows other targets to emit
CopyFromRegs that are not legal for arguments.
llvm-svn: 19668
2005-01-18 17:54:55 +00:00
Chris Lattner
891aa537f7
Teach legalize to promote SetCC results.
...
llvm-svn: 19657
2005-01-18 02:59:52 +00:00
Chris Lattner
95307053ec
Allow setcc operations to have nonbool types.
...
llvm-svn: 19656
2005-01-18 02:52:03 +00:00
Chris Lattner
906541da95
Fix the completely broken FP constant folds for setcc's.
...
llvm-svn: 19651
2005-01-18 02:11:55 +00:00
Chris Lattner
c0aca0d13c
Non-volatile loads can be freely reordered against each other. This fixes
...
X86/reg-pressure.ll again, and allows us to do nice things in other cases.
For example, we now codegen this sort of thing:
int %loadload(int *%X, int* %Y) {
%Z = load int* %Y
%Y = load int* %X ;; load between %Z and store
%Q = add int %Z, 1
store int %Q, int* %Y
ret int %Y
}
Into this:
loadload:
mov %EAX, DWORD PTR [%ESP + 4]
mov %EAX, DWORD PTR [%EAX]
mov %ECX, DWORD PTR [%ESP + 8]
inc DWORD PTR [%ECX]
ret
where we weren't able to form the 'inc [mem]' before. This also lets the
instruction selector emit loads in any order it wants to, which can be good
for register pressure as well.
llvm-svn: 19644
2005-01-17 22:19:26 +00:00
Chris Lattner
49291c4d96
Don't call SelectionDAG.getRoot() directly, go through a forwarding method.
...
llvm-svn: 19642
2005-01-17 19:43:36 +00:00
Chris Lattner
88bbcfc893
Implement a target independent optimization to codegen arguments only into
...
the basic block that uses them if possible. This is a big win on X86, as it
lets us fold the argument loads into instructions and reduce register pressure
(by not loading all of the arguments in the entry block).
For this (contrived to show the optimization) testcase:
int %argtest(int %A, int %B) {
%X = sub int 12345, %A
br label %L
L:
%Y = add int %X, %B
ret int %Y
}
we used to produce:
argtest:
mov %ECX, DWORD PTR [%ESP + 4]
mov %EAX, 12345
sub %EAX, %ECX
mov %EDX, DWORD PTR [%ESP + 8]
.LBBargtest_1: # L
add %EAX, %EDX
ret
now we produce:
argtest:
mov %EAX, 12345
sub %EAX, DWORD PTR [%ESP + 4]
.LBBargtest_1: # L
add %EAX, DWORD PTR [%ESP + 8]
ret
This also fixes the FIXME in the code.
BTW, this occurs in real code. 164.gzip shrinks from 8623 to 8608 lines of
.s file. The stack frame in huft_build shrinks from 1644->1628 bytes,
inflate_codes shrinks from 116->108 bytes, and inflate_block from 2620->2612,
due to fewer spills.
Take that alkis. :-)
llvm-svn: 19639
2005-01-17 17:55:19 +00:00
Chris Lattner
49a1f3a109
Refactor code into a new method.
...
llvm-svn: 19635
2005-01-17 17:15:02 +00:00
Chris Lattner
ec55e3e529
Implement legalize of call nodes.
...
llvm-svn: 19617
2005-01-16 19:46:48 +00:00
Chris Lattner
0eca430af1
Revamp supported ops. Instead of just being supported or not, we now keep
...
track of how to deal with it, and provide the target with a hook that they
can use to legalize arbitrary operations in arbitrary ways.
Implement custom lowering for a couple of ops, implement promotion for select
operations (which x86 needs).
llvm-svn: 19613
2005-01-16 07:29:19 +00:00
Chris Lattner
835a5efef3
add method stub
...
llvm-svn: 19612
2005-01-16 07:28:41 +00:00
Chris Lattner
907534af24
Don't mash stuff together.
...
llvm-svn: 19611
2005-01-16 07:28:31 +00:00
Chris Lattner
0f4f239899
Implement some more missing promotions.
...
llvm-svn: 19606
2005-01-16 05:06:12 +00:00
Chris Lattner
742b77f9af
Clarify assertion.
...
llvm-svn: 19597
2005-01-16 02:23:34 +00:00
Chris Lattner
4517b8af97
Add assertions.
...
llvm-svn: 19596
2005-01-16 02:23:22 +00:00
Chris Lattner
9f8589f4b3
Add support for promoted registers being live across blocks.
...
llvm-svn: 19595
2005-01-16 02:23:07 +00:00
Chris Lattner
01e2ce8a4c
Move some information into the TargetLowering object.
...
llvm-svn: 19583
2005-01-16 01:11:45 +00:00
Chris Lattner
9762070e50
Use the new TLI method to get this.
...
llvm-svn: 19582
2005-01-16 01:11:19 +00:00
Chris Lattner
0777f84d53
legalize a bunch of operations that I missed.
...
llvm-svn: 19580
2005-01-16 00:38:00 +00:00
Chris Lattner
1de18d422e
Add support for targets that require promotions.
...
llvm-svn: 19579
2005-01-16 00:37:38 +00:00
Chris Lattner
8c4c81d6b3
Fix some serious bugs in promotion.
...
llvm-svn: 19578
2005-01-16 00:17:42 +00:00