Chris Lattner
e9487f0dc8
Start threading across blocks with code in them, so long as the code does
...
not define a value that is used outside of it's block. This catches many
more simplifications, e.g. 854 in 176.gcc, 137 in vpr, etc.
This implements branch-phi-thread.ll:test3.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23397 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-20 01:48:40 +00:00
Chris Lattner
055135d1c1
make this test harder: add a case where instructions are in the bb to be
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threaded over
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23396 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-20 01:43:41 +00:00
Chris Lattner
2e42e36698
Implement merging of blocks with the same condition if the block has multiple
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predecessors. This implements branch-phi-thread.ll::test1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23395 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-20 00:43:16 +00:00
Chris Lattner
ecd7b6d110
new testcase
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23394 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-20 00:41:55 +00:00
Chris Lattner
9c88d98162
Reject a case we don't handle yet
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23393 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 23:57:04 +00:00
Chris Lattner
7e1ff8d2d9
remove debugging code :-/
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23392 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 23:50:15 +00:00
Chris Lattner
eaba3a194c
Implement SimplifyCFG/branch-phi-thread.ll, the most trivial case of threading
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control across branches with determined outcomes. More generality to follow.
This triggers a couple thousand times in specint.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23391 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 23:49:37 +00:00
Chris Lattner
b6e2b7e4cd
new testcase.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23390 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 23:48:04 +00:00
Nate Begeman
44728a7bb6
Stub out the rest of the DAG Combiner. Just need to fill in the
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select_cc bits and then wrap it in a convenience function for use with
regular select.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23389 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 22:34:01 +00:00
Chris Lattner
cea8688ee4
Teach the local spiller to turn stack slot loads into register-register copies
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when possible, avoiding the load (and avoiding the copy if the value is already
in the right register).
This patch came about when I noticed code like the following being generated:
store R17 -> [SS1]
...blah...
R4 = load [SS1]
This was causing an LSU reject on the G5. This problem was due to the register
allocator folding spill code into a reg-reg copy (producing the load), which
prevented the spiller from being able to rewrite the load into a copy, despite
the fact that the value was already available in a register. In the case
above, we now rip out the R4 load and replace it with a R4 = R17 copy.
This speeds up several programs on X86 (which spills a lot :) ), e.g.
smg2k from 22.39->20.60s, povray from 12.93->12.66s, 168.wupwise from
68.54->53.83s (!), 197.parser from 7.33->6.62s (!), etc. This may have a larger
impact in some cases on the G5 (by avoiding LSU rejects), though it probably
won't trigger as often (less spilling in general).
Targets that implement folding of loads/stores into copies should implement
the isLoadFromStackSlot hook to get this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23388 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 06:56:21 +00:00
Chris Lattner
a92aab74dd
Implement the isLoadFromStackSlot interface
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23387 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 05:23:44 +00:00
Chris Lattner
7203e158da
Refactor this code a bit and make it more general. This now compiles:
...
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) { b.j += x; }
To:
_plus2:
lis r2, ha16(L_b$non_lazy_ptr)
lwz r2, lo16(L_b$non_lazy_ptr)(r2)
lwz r4, 0(r2)
slwi r3, r3, 6
add r3, r4, r3
rlwimi r3, r4, 0, 26, 14
stw r3, 0(r2)
blr
instead of:
_plus2:
lis r2, ha16(L_b$non_lazy_ptr)
lwz r2, lo16(L_b$non_lazy_ptr)(r2)
lwz r4, 0(r2)
rlwinm r5, r4, 26, 21, 31
add r3, r5, r3
rlwimi r4, r3, 6, 15, 25
stw r4, 0(r2)
blr
by eliminating an 'and'.
I'm pretty sure this is as small as we can go :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23386 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 07:22:02 +00:00
Chris Lattner
150f12af7f
Compile
...
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) {
b.j += x;
}
to:
plus2:
mov %EAX, DWORD PTR [b]
mov %ECX, %EAX
and %ECX, 131008
mov %EDX, DWORD PTR [%ESP + 4]
shl %EDX, 6
add %EDX, %ECX
and %EDX, 131008
and %EAX, -131009
or %EDX, %EAX
mov DWORD PTR [b], %EDX
ret
instead of:
plus2:
mov %EAX, DWORD PTR [b]
mov %ECX, %EAX
shr %ECX, 6
and %ECX, 2047
add %ECX, DWORD PTR [%ESP + 4]
shl %ECX, 6
and %ECX, 131008
and %EAX, -131009
or %ECX, %EAX
mov DWORD PTR [b], %ECX
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23385 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 06:30:59 +00:00
Chris Lattner
0b7c0bf249
Generalize this transform, using MaskedValueIsZero, allowing us to compile:
...
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus3 (unsigned int x) { b.k += x; }
To:
plus3:
mov %EAX, DWORD PTR [%ESP + 4]
shl %EAX, 17
add DWORD PTR [b], %EAX
ret
instead of:
plus3:
mov %EAX, DWORD PTR [%ESP + 4]
shl %EAX, 17
mov %ECX, DWORD PTR [b]
add %EAX, %ECX
and %EAX, -131072
and %ECX, 131071
or %ECX, %EAX
mov DWORD PTR [b], %ECX
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23384 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 06:02:59 +00:00
Chris Lattner
5aa7666ebe
fix typeo
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23383 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 05:25:20 +00:00
Chris Lattner
0d947ea943
Remove unintentionally committed code
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23382 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 05:12:51 +00:00
Chris Lattner
11021cb988
implement shift.ll:test25. This compiles:
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struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus3 (unsigned int x) {
b.k += x;
}
to:
_plus3:
lis r2, ha16(L_b$non_lazy_ptr)
lwz r2, lo16(L_b$non_lazy_ptr)(r2)
lwz r3, 0(r2)
rlwinm r4, r3, 0, 0, 14
add r4, r4, r3
rlwimi r4, r3, 0, 15, 31
stw r4, 0(r2)
blr
instead of:
_plus3:
lis r2, ha16(L_b$non_lazy_ptr)
lwz r2, lo16(L_b$non_lazy_ptr)(r2)
lwz r4, 0(r2)
srwi r5, r4, 17
add r3, r5, r3
slwi r3, r3, 17
rlwimi r3, r4, 0, 15, 31
stw r3, 0(r2)
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23381 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 05:12:10 +00:00
Chris Lattner
ab4ea6e980
new testcase
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23380 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 05:10:39 +00:00
Chris Lattner
c8e7756791
Implement add.ll:test29. Codegening:
...
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus1 (unsigned int x) {
b.i += x;
}
as:
_plus1:
lis r2, ha16(L_b$non_lazy_ptr)
lwz r2, lo16(L_b$non_lazy_ptr)(r2)
lwz r4, 0(r2)
add r3, r4, r3
rlwimi r3, r4, 0, 0, 25
stw r3, 0(r2)
blr
instead of:
_plus1:
lis r2, ha16(L_b$non_lazy_ptr)
lwz r2, lo16(L_b$non_lazy_ptr)(r2)
lwz r4, 0(r2)
rlwinm r5, r4, 0, 26, 31
add r3, r5, r3
rlwimi r3, r4, 0, 0, 25
stw r3, 0(r2)
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23379 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 04:24:45 +00:00
Chris Lattner
dc0ffccb19
new testcase
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23378 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 04:22:59 +00:00
Chris Lattner
3255bd101d
remove debug output
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23377 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 03:50:25 +00:00
Chris Lattner
e9bed7d107
Implement or.ll:test21. This teaches instcombine to be able to turn this:
...
struct {
unsigned int bit0:1;
unsigned int ubyte:31;
} sdata;
void foo() {
sdata.ubyte++;
}
into this:
foo:
add DWORD PTR [sdata], 2
ret
instead of this:
foo:
mov %EAX, DWORD PTR [sdata]
mov %ECX, %EAX
add %ECX, 2
and %ECX, -2
and %EAX, 1
or %EAX, %ECX
mov DWORD PTR [sdata], %EAX
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23376 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 03:42:07 +00:00
Chris Lattner
1e122d1dc2
new testcase
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23375 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 03:39:02 +00:00
Chris Lattner
6a78c2157a
Implement hook for ppc
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23374 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-17 01:03:26 +00:00
Chris Lattner
7d3041e060
add a new callback
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23373 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-17 01:02:45 +00:00
Nate Begeman
452d7bebaa
More DAG combining. Still need the branch instructions, and select_cc
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23371 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-16 00:54:12 +00:00
Chris Lattner
b9f01eb7bc
Fix a minor bug, add comments
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23370 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-16 00:29:46 +00:00
Chris Lattner
a28aec1da7
teach the type inference code how to infer types for instructions and node
...
xforms. Run type inference on result patterns, so we always have fully typed
results (and to catch errors in .td files).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23369 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-15 22:23:50 +00:00
Chris Lattner
ae5b350b3b
put instructions into a map instead of a vector for quick lookup
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23368 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-15 21:57:35 +00:00
Chris Lattner
ae6d828de8
when parsing instructions remember information about the types taken and
...
returned.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23367 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-15 21:51:12 +00:00
Chris Lattner
4ac85b3e94
disable this for now
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23366 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-15 21:44:00 +00:00
Chris Lattner
abbb605d80
Start parsing "Pattern" nodes
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23365 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-15 21:42:00 +00:00
Chris Lattner
b39e4be1e1
rename a couple of methods, add structure for pattern parsing
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23364 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-15 02:38:02 +00:00
Chris Lattner
f1311843d5
Verify that xform functions only occur in logical places
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23363 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 23:05:13 +00:00
Chris Lattner
2175c18c4f
Promote xform fns to be explicit nodes in result patterns, and clean off
...
predicates since they will have already matched at this point.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23362 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 23:01:59 +00:00
Chris Lattner
b0276200e6
start building the instruction dest pattern correctly. Change the xform
...
functions to preserve the Record for the xform instead of making it into a
function name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23361 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 22:55:26 +00:00
Chris Lattner
7da852fbab
catch unnamed inputs
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23360 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 22:06:36 +00:00
Chris Lattner
0b59225fe1
check that there are no unexpected operands
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23359 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 21:59:34 +00:00
Chris Lattner
c4a8b73ab3
force all instruction operands to be named.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23358 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 21:13:50 +00:00
Chris Lattner
2e3f5db9ff
Give all operands names
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23357 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 21:11:13 +00:00
Chris Lattner
43ef1318c6
give all operands names
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23356 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 21:10:24 +00:00
Chris Lattner
5d7d3dba9c
Check that operands have unique names. REJECT instructions with broken operand
...
lists: only don't parse them if they are entirely missing (sparcv9).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23355 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 21:05:02 +00:00
Chris Lattner
3a7319d5ed
fix a broke range check
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23354 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 21:04:12 +00:00
Chris Lattner
d8a3bde6fd
Parse significantly more of the instruction pattern, now collecting and
...
verifying information about the operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23353 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 20:53:42 +00:00
Chris Lattner
4345a4a452
Fix some issues exposed by more testing. XORIS had the wrong operands
...
specified. The various *imm operands defined by PPC are really all i32,
even though the actual immediate is restricted to a smaller value in it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23352 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 20:53:05 +00:00
Chris Lattner
39e8af9913
Verify that set destinations occur first in the instruction operand list.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23351 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 18:19:25 +00:00
Chris Lattner
c36d065dce
Fix some bugs noticed by new checking code
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23350 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 18:18:39 +00:00
Chris Lattner
a974b20cae
add an accessor
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23349 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 18:02:53 +00:00
Chris Lattner
6e2f843114
Fix the regression last night compiling povray
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23348 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 17:32:56 +00:00
Chris Lattner
3452d23c34
fix a major regression from my patch this afternoon
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23347 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-14 06:06:45 +00:00