Chris Lattner
e3152e54b5
Compile:
...
int test3(int a, int b) { return (a < 0) ? a : 0; }
to:
_test3:
srawi r2, r3, 31
and r3, r2, r3
blr
instead of:
_test3:
cmpwi cr0, r3, 1
li r2, 0
blt cr0, LBB2_2 ;entry
LBB2_1: ;entry
mr r3, r2
LBB2_2: ;entry
blr
This implements: PowerPC/select_lt0.ll:seli32_a_a
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30517 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 06:41:35 +00:00
Chris Lattner
7e932de7f5
add a note
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30515 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 06:32:10 +00:00
Chris Lattner
84750587bf
Fold the full generality of (any_extend (truncate x))
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30514 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 06:29:17 +00:00
Chris Lattner
5f42a240ba
Two things:
...
1. teach SimplifySetCC that '(srl (ctlz x), 5) == 0' is really x != 0.
2. Teach visitSELECT_CC to use SimplifySetCC instead of calling it and
ignoring the result. This allows us to compile:
bool %test(ulong %x) {
%tmp = setlt ulong %x, 4294967296
ret bool %tmp
}
to:
_test:
cntlzw r2, r3
cmplwi cr0, r3, 1
srwi r2, r2, 5
li r3, 0
beq cr0, LBB1_2 ;
LBB1_1: ;
mr r3, r2
LBB1_2: ;
blr
instead of:
_test:
addi r2, r3, -1
cntlzw r2, r2
cntlzw r3, r3
srwi r2, r2, 5
cmplwi cr0, r2, 0
srwi r2, r3, 5
li r3, 0
bne cr0, LBB1_2 ;
LBB1_1: ;
mr r3, r2
LBB1_2: ;
blr
This isn't wonderful, but it's an improvement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30513 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 06:19:26 +00:00
Chris Lattner
ac924c8248
This is already done
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30512 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 04:59:33 +00:00
Chris Lattner
b8456460cb
We went through all that trouble to compute whether it was safe to transform
...
this comparison, but never checked it. Whoops, no wonder we miscompiled
177.mesa!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30511 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 04:44:59 +00:00
Chris Lattner
711762497c
Improve PPC64 equality comparisons like PPC32 comparisons.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30510 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 04:33:27 +00:00
Chris Lattner
3836dbd3bd
Two improvements:
...
1. Codegen this comparison:
if (X == 0x8000)
as:
cmplwi cr0, r3, 32768
bne cr0, LBB1_2 ;cond_next
instead of:
lis r2, 0
ori r2, r2, 32768
cmpw cr0, r3, r2
bne cr0, LBB1_2 ;cond_next
2. Codegen this comparison:
if (X == 0x12345678)
as:
xoris r2, r3, 4660
cmplwi cr0, r2, 22136
bne cr0, LBB1_2 ;cond_next
instead of:
lis r2, 4660
ori r2, r2, 22136
cmpw cr0, r3, r2
bne cr0, LBB1_2 ;cond_next
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30509 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 04:25:47 +00:00
Chris Lattner
cc96ac3a7d
Add a note that we should match rlwnm better
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30508 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 03:59:25 +00:00
Chris Lattner
3fe6c1d389
Legalize is no longer limited to cleverness with just constant shift amounts.
...
Allow it to be clever when possible and fall back to the gross code when needed.
This allows us to compile:
long long foo1(long long X, int C) {
return X << (C|32);
}
long long foo2(long long X, int C) {
return X << (C&~32);
}
to:
_foo1:
rlwinm r2, r5, 0, 27, 31
slw r3, r4, r2
li r4, 0
blr
.globl _foo2
.align 4
_foo2:
rlwinm r2, r5, 0, 27, 25
subfic r5, r2, 32
slw r3, r3, r2
srw r5, r4, r5
or r3, r3, r5
slw r4, r4, r2
blr
instead of:
_foo1:
ori r2, r5, 32
subfic r5, r2, 32
addi r6, r2, -32
srw r5, r4, r5
slw r3, r3, r2
slw r6, r4, r6
or r3, r3, r5
slw r4, r4, r2
or r3, r3, r6
blr
.globl _foo2
.align 4
_foo2:
rlwinm r2, r5, 0, 27, 25
subfic r5, r2, 32
addi r6, r2, -32
srw r5, r4, r5
slw r3, r3, r2
slw r6, r4, r6
or r3, r3, r5
slw r4, r4, r2
or r3, r3, r6
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30507 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 03:47:40 +00:00
Chris Lattner
0ea26ca45b
Expand 64-bit shifts more optimally if we know that the high bit of the
...
shift amount is one or zero. For example, for:
long long foo1(long long X, int C) {
return X << (C|32);
}
long long foo2(long long X, int C) {
return X << (C&~32);
}
we get:
_foo1:
movb $31, %cl
movl 4(%esp), %edx
andb 12(%esp), %cl
shll %cl, %edx
xorl %eax, %eax
ret
_foo2:
movb $223, %cl
movl 4(%esp), %eax
movl 8(%esp), %edx
andb 12(%esp), %cl
shldl %cl, %eax, %edx
shll %cl, %eax
ret
instead of:
_foo1:
subl $4, %esp
movl %ebx, (%esp)
movb $32, %bl
movl 8(%esp), %eax
movl 12(%esp), %edx
movb %bl, %cl
orb 16(%esp), %cl
shldl %cl, %eax, %edx
shll %cl, %eax
xorl %ecx, %ecx
testb %bl, %bl
cmovne %eax, %edx
cmovne %ecx, %eax
movl (%esp), %ebx
addl $4, %esp
ret
_foo2:
subl $4, %esp
movl %ebx, (%esp)
movb $223, %cl
movl 8(%esp), %eax
movl 12(%esp), %edx
andb 16(%esp), %cl
shldl %cl, %eax, %edx
shll %cl, %eax
xorl %ecx, %ecx
xorb %bl, %bl
testb %bl, %bl
cmovne %eax, %edx
cmovne %ecx, %eax
movl (%esp), %ebx
addl $4, %esp
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30506 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 03:38:48 +00:00
Evan Cheng
571c15e38a
Back out Chris' last set of changes. This breaks 177.mesa and povray somehow.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30505 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 01:39:40 +00:00
Evan Cheng
7df4ad9a7f
80 col.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30504 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20 01:10:02 +00:00
Andrew Lenharth
16d7955eb0
If we have an add, do it in the pointer realm, not the int realm. This is critical in the linux kernel for pointer analysis correctness
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30496 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 18:24:51 +00:00
Chris Lattner
2b41b8e870
Fix UnitTests/2005-05-12-Int64ToFP.c with llc-beta. In particular, do not
...
allow it to go into an infinite loop, filling up the disk!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30494 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 18:02:01 +00:00
Rafael Espindola
4d4c021758
fix header
...
add comments
untabify
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30486 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 16:41:40 +00:00
Rafael Espindola
71f3b94fa8
Implement a MachineFunctionPass to fix the mul instruction
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30485 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 15:49:25 +00:00
Chris Lattner
f529b08c0d
item done
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30483 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 06:19:03 +00:00
Chris Lattner
733f576d29
implement select.ll:test19-22
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30482 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 06:18:21 +00:00
Chris Lattner
cf9d0acfef
Fold the PPCISD shifts when presented with 0 inputs. This occurs for code
...
like:
long long test(long long X, int Y) {
return 1ULL << Y;
}
long long test2(long long X, int Y) {
return -1LL << Y;
}
which we used to compile to:
_test:
li r2, 1
subfic r3, r5, 32
li r4, 0
addi r6, r5, -32
srw r3, r2, r3
slw r4, r4, r5
slw r6, r2, r6
or r3, r4, r3
slw r4, r2, r5
or r3, r3, r6
blr
_test2:
li r2, -1
subfic r3, r5, 32
addi r6, r5, -32
srw r3, r2, r3
slw r4, r2, r5
slw r2, r2, r6
or r3, r4, r3
or r3, r3, r2
blr
Now we produce:
_test:
li r2, 1
addi r3, r5, -32
subfic r4, r5, 32
slw r3, r2, r3
srw r4, r2, r4
or r3, r4, r3
slw r4, r2, r5
blr
_test2:
li r2, -1
subfic r3, r5, 32
addi r6, r5, -32
srw r3, r2, r3
slw r4, r2, r5
slw r2, r2, r6
or r3, r4, r3
or r3, r3, r2
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30479 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 05:22:59 +00:00
Chris Lattner
863ac769b8
Fold extract_element(cst) to cst
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30478 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 05:02:39 +00:00
Chris Lattner
5c6621c3bc
Minor speedup for legalize by avoiding some malloc traffic
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30477 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 04:51:23 +00:00
Evan Cheng
6b5578f052
Fix a typo.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30474 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 23:28:33 +00:00
Evan Cheng
52cc1ea2a1
Allow i32 UDIV, SDIV, UREM, SREM to be expanded into libcalls.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30470 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 21:49:04 +00:00
Nick Lewycky
025f4c0fad
Walk down the dominator tree instead of the control flow graph. That means
...
that we can't modify the CFG any more, at least not until it's possible
to update the dominator tree (PR217).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30469 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 21:09:35 +00:00
Andrew Lenharth
2ab804c607
A pass to remove the worst of the replay trap offenders, and as a bonus, align basic blocks when it is free to do so
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30467 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 19:44:29 +00:00
Chris Lattner
6d7ca92bbf
Fix an infinite loop building the CFE
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30465 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 18:27:05 +00:00
Andrew Lenharth
ea4f9d5801
Jump tables on Alpha
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30463 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 18:01:03 +00:00
Andrew Lenharth
303c6222a4
oops
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30462 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 18:00:18 +00:00
Andrew Lenharth
3fbd67898e
absolute addresses must match pointer size
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30461 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 17:59:35 +00:00
Jim Laskey
e85fb6719a
Sort out mangled names for globals
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30460 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 14:47:26 +00:00
Chris Lattner
4af90abc13
Implement a trivial optzn: of vastart is never called in a function that takes
...
... args, remove the '...'.
This is Transforms/DeadArgElim/dead_vaargs.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30459 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 07:02:31 +00:00
Chris Lattner
f73fb88688
add a note. Our 64-bit shifts are ~30% slower than gcc's
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30457 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 05:36:54 +00:00
Chris Lattner
e695a3bd32
Implement InstCombine/cast.ll:test31. This speeds up 462.libquantum by 26%.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30456 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 05:27:43 +00:00
Chris Lattner
79bc332ddb
add a helper method
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30452 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 04:54:57 +00:00
Chris Lattner
b33a42a21f
This is closer to what we really want.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30451 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 04:54:35 +00:00
Chris Lattner
b7363791ed
Implement Transforms/InstCombine/shift-sra.ll:test0
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30450 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 04:31:40 +00:00
Chris Lattner
65b72baa59
Rewrite shift/and/compare sequences to promote better licm of the RHS.
...
Use isLogicalShift/isArithmeticShift to simplify code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30448 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 04:22:48 +00:00
Anton Korobeynikov
bcb9770efe
Added some eye-candy for Subtarget type checking
...
Added X86 StdCall & FastCall calling conventions. Codegen will follow.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30446 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-17 20:25:45 +00:00
Chris Lattner
2f463865c2
Add ShiftInst::isLogical/ArithmeticShift methods.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30445 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-17 19:29:56 +00:00
Chris Lattner
a5b07404f7
Add new SetCondInst::isRelational/isEquality methods. Rename
...
Instruction::isRelational to Instruction::isComparison.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30444 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-17 19:14:47 +00:00
Nick Lewycky
e81f725b3a
Explain change with a comment.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30443 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-17 17:51:00 +00:00
Nick Lewycky
38c7c42a32
Fix PR912. The input to erase() must not be a reference to the data
...
being erased.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30442 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-17 16:23:36 +00:00
Anton Korobeynikov
93c2b37340
Small fixes for supporting dll* linkage types
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30441 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-17 13:06:18 +00:00
Chris Lattner
7ed96abc09
add a note noticed through source inspection
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30418 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-16 23:57:51 +00:00
Chris Lattner
8829dc88a8
Oh yeah, this is needed too
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30407 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-16 05:08:34 +00:00
Chris Lattner
88640b5ecd
add a note
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30406 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-16 03:30:19 +00:00
Chris Lattner
f6bd07c7fe
Fix Transforms/InstCombine/2006-09-15-CastToBool.ll and PR913
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30405 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-16 03:14:10 +00:00
Chris Lattner
a89654b1a1
simplify control flow, no functionality change
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30403 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-16 00:21:44 +00:00
Chris Lattner
7d7bffe157
Allow custom expand of mul
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30402 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-16 00:09:24 +00:00