Chris Lattner
98a8ba0393
Fix a problem where probing for addressing modes caused expressions to be
...
emitted too early. In particular, this fixes
Regression/CodeGen/X86/regpressure.ll:regpressure3.
This also improves the 2nd basic block in 164.gzip:flush_block, which went from
.LBBflush_block_1: # loopentry.1.i
movzx %EAX, WORD PTR [dyn_ltree + 20]
movzx %ECX, WORD PTR [dyn_ltree + 16]
mov DWORD PTR [%ESP + 32], %ECX
movzx %ECX, WORD PTR [dyn_ltree + 12]
movzx %EDX, WORD PTR [dyn_ltree + 8]
movzx %EBX, WORD PTR [dyn_ltree + 4]
mov DWORD PTR [%ESP + 36], %EBX
movzx %EBX, WORD PTR [dyn_ltree]
add DWORD PTR [%ESP + 36], %EBX
add %EDX, DWORD PTR [%ESP + 36]
add %ECX, %EDX
add DWORD PTR [%ESP + 32], %ECX
add %EAX, DWORD PTR [%ESP + 32]
movzx %ECX, WORD PTR [dyn_ltree + 24]
add %EAX, %ECX
mov %ECX, 0
mov %EDX, %ECX
to
.LBBflush_block_1: # loopentry.1.i
movzx %EAX, WORD PTR [dyn_ltree]
movzx %ECX, WORD PTR [dyn_ltree + 4]
add %ECX, %EAX
movzx %EAX, WORD PTR [dyn_ltree + 8]
add %EAX, %ECX
movzx %ECX, WORD PTR [dyn_ltree + 12]
add %ECX, %EAX
movzx %EAX, WORD PTR [dyn_ltree + 16]
add %EAX, %ECX
movzx %ECX, WORD PTR [dyn_ltree + 20]
add %ECX, %EAX
movzx %EAX, WORD PTR [dyn_ltree + 24]
add %ECX, %EAX
mov %EAX, 0
mov %EDX, %EAX
... which results in less spilling in the function.
This change alone speeds up 164.gzip from 37.23s to 36.24s on apoc. The
default isel takes 37.31s.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19650 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-18 01:06:26 +00:00
Chris Lattner
e9fe2bcac2
Fix indentation.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19649 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 23:25:45 +00:00
Chris Lattner
869e0434ae
Don't bother using max here.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19647 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 23:02:13 +00:00
Chris Lattner
90d1be7eef
Do not give token factor nodes outrageous weights
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19645 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 22:56:09 +00:00
Chris Lattner
5c65981a57
Two changes:
...
1. Fold [mem] += (1|-1) into inc [mem]/dec [mem] to save some icache space.
2. Do not let token factor nodes prevent forming '[mem] op= val' folds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19643 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 22:10:42 +00:00
Chris Lattner
e10269ba30
Refactor load/op/store folding into it's own method, no functionality changes.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19641 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 19:25:26 +00:00
Chris Lattner
ae3ffba466
Fix a major regression last night that prevented us from producing [mem] op= reg
...
operations.
The body of the if is less indented but unmodified in this patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19638 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 17:49:14 +00:00
Chris Lattner
2a4e508281
Codegen this:
...
int %foo(int %X) {
%T = add int %X, 13
%S = mul int %T, 3
ret int %S
}
as this:
mov %ECX, DWORD PTR [%ESP + 4]
lea %EAX, DWORD PTR [%ECX + 2*%ECX + 39]
ret
instead of this:
mov %ECX, DWORD PTR [%ESP + 4]
mov %EAX, %ECX
add %EAX, 13
imul %EAX, %EAX, 3
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19633 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 06:48:02 +00:00
Tanya Lattner
7a866d9a43
Added tmp instructions to preserve ssa.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19632 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 06:47:26 +00:00
Chris Lattner
4ff348befa
Fix test/Regression/CodeGen/X86/2005-01-17-CycleInDAG.ll and 132.ijpeg.
...
Do not fold a load into an operation if it will induce a cycle in the DAG.
Repeat after me: dAg.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19631 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 06:26:58 +00:00
Chris Lattner
cb1aa8d772
Do not fold a load into a comparison that is used by more than one place.
...
The comparison will probably be folded, so this is not ok to do.
This fixed 197.parser.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19624 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 01:34:14 +00:00
Chris Lattner
c98279d371
Do not codegen 'xor bool, true' as 'not reg'. not reg inverts the upper bits
...
of the bytereg. This fixes yacr2, 300.twolf and probably others.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19622 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 00:23:16 +00:00
Chris Lattner
4df0de975a
Set up the shift and setcc types.
...
If we emit a load because we followed a token chain to get to it, try to
fold it into its single user if possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19620 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17 00:00:33 +00:00
Tanya Lattner
7600587e66
Added paramters to a few functions in order to allow me to change the functions to preserve SSA
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19615 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16 08:51:10 +00:00
Chris Lattner
da2ce11407
* Adjust to changes in TargetLowering interfaces.
...
* Remove custom promotion for bool and byte select ops. Legalize now
promotes them for us.
* Allow folding ConstantPoolIndexes into EXTLOAD's, useful for float immediates.
* Declare which operations are not supported better.
* Add some hacky code for TRUNCSTORE to pretend that we have truncstore
for i16 types. This is useful for testing promotion code because I can
just remove 16-bit registers all together and verify that programs work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19614 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16 07:34:08 +00:00
Chris Lattner
ccad8439e0
cycles_t -> CycleCount_t
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19604 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16 04:20:30 +00:00
Reid Spencer
bdf6a39d1c
Rename BUILD_* to PROJ_*
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19592 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16 02:21:29 +00:00
Tanya Lattner
5fd2ef1e43
Fixed a couple of instructions that broke SSA.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19587 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16 02:14:17 +00:00
Chris Lattner
638559aaa3
Improve compatiblity with HPUX on Itanium, patch by Duraid Madina
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19586 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16 01:31:31 +00:00
Chris Lattner
45554a61f2
Add a new target-independent code generator flag.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19567 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-15 06:00:32 +00:00
Chris Lattner
e9ef81dd2f
Add support for truncstore and *extload.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19566 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-15 05:22:24 +00:00
Chris Lattner
7f2afac1dc
Adjust to CopyFromREg changes.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19561 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-14 22:37:41 +00:00
Chris Lattner
3c70764907
Fix Regression/CodeGen/PowerPC/2005-01-14-UndefLong.ll
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19557 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-14 20:22:02 +00:00
Chris Lattner
fbd4de1d9b
Fix: Regression/CodeGen/PowerPC/2005-01-14-SetSelectCrash.ll
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19555 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-14 19:31:00 +00:00
Chris Lattner
18c2f13e0f
Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19535 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13 20:50:02 +00:00
Chris Lattner
1d50b7fa53
Codegen factor nodes more intelligently according to perceived register pressure.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19532 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13 19:56:00 +00:00
Chris Lattner
c35807155c
Initial trivial (but stupid) codegen for this node.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19529 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13 18:01:36 +00:00
Chris Lattner
636e79a20f
Add some really pedantic assertions to the load folding code. Fix a bunch
...
of cases where we accidentally emitted a load folded once and unfolded
elsewhere.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19522 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13 05:53:16 +00:00
Chris Lattner
a0bb692b27
We can only fold a load into an op if there is exactly one use of the value.
...
Checking to see if the load has two uses is not equivalent, as the chain
value may have zero uses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19518 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 18:38:26 +00:00
Chris Lattner
9bbd992eb1
Try both ways to fold an add together. This allows us to generate this code
...
imul %EAX, %EAX, 400
add %ECX, %EAX
add %ESI, DWORD PTR [%ECX + 4*%EDX]
inc %EDX
cmp %EDX, 100
instead of this:
imul %EAX, %EAX, 400
add %ECX, %EAX
mov %EAX, %EDX
shl %EAX, 2
add %ECX, %EAX
add %ESI, DWORD PTR [%ECX]
inc %EDX
cmp %EDX, 100
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19513 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 18:08:53 +00:00
Chris Lattner
2b9378646d
Fix a major miscompilation where we were overwriting the scale reg.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19511 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 07:33:20 +00:00
Chris Lattner
48034fd9f1
Do not use the type of the RHS constant to determine the type of the operation.
...
This fails for shifts because the constant is always 8 bits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19508 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 05:22:07 +00:00
Chris Lattner
a23ccfb124
Do not lose the offset from teh global when peephole optimizing instructions.
...
This fixes FreeBench/pcompress
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19507 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 05:17:28 +00:00
Jeff Cohen
603fea9eb6
Fix C++ more compilatiom errors
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19504 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 04:29:05 +00:00
Chris Lattner
a56cea4495
Fix a compile error with VC++, which things that static const arrays need
...
to be dynamically initialized. :(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19503 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 04:23:22 +00:00
Chris Lattner
7dbcb75b15
Fix a bug that caused us to crash on povray. We weren't emitting an FP_REG_KILL into a block that had a successor with a FP PHI node.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19502 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 04:21:28 +00:00
Chris Lattner
e11a9a93a8
Print a load of a null pointer (in intel mode) like this:
...
mov %AX, WORD PTR [0]
instead of like this:
mov %AX, WORD PTR []
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19501 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 04:07:11 +00:00
Chris Lattner
9f2cb3da48
Print a load of a null pointer like this:
...
movw 0, %ax
instead of like this:
movw , %ax
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19500 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 04:05:19 +00:00
Chris Lattner
085c9955ca
Fix a crash compiling povray on UINT_TO_FP from i16.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19499 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 04:00:00 +00:00
Chris Lattner
4292830fe5
There are no [mem] op= reg instructions for FP, so remove their entries.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19496 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 03:16:09 +00:00
Chris Lattner
db8c368d7b
Fix a bug where we didn't insert FP_REG_KILL instructions into MBB's that
...
contain FP PHI nodes but no other FP defining instructions. This fixes
183.equake
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19495 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 02:57:10 +00:00
Chris Lattner
afce4306ec
Fold TRUNCATE (LOAD P) into a smaller load from P.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19494 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 02:19:06 +00:00
Chris Lattner
ef6806c979
Be more careful about order of arg evalution for CopyToReg nodes. This shrinks
...
256.bzip2 from 7142 to 7103 lines of .s file.
Second, add initial support for folding loads into compares, though this code
is dynamically dead for now. :(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19493 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 02:02:48 +00:00
Chris Lattner
7ea64f5d12
Fold some more [mem] op= val operators. This allows us to things like this
...
several times in 256.bzip2:
mov %EAX, DWORD PTR [%ESP + 204]
- mov %EAX, DWORD PTR [%EAX]
- or %EAX, 2097152
- mov %ECX, DWORD PTR [%ESP + 204]
- mov DWORD PTR [%ECX], %EAX
+ or DWORD PTR [%EAX], 2097152
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19492 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12 01:28:00 +00:00
Chris Lattner
dbba22fa2a
Fold loads into sign/zero extends. instead of:
...
mov %AL, BYTE PTR [%EDX + l18_length_code]
movzx %EAX, %AL
Emit:
movzx %EAX, BYTE PTR [%EDX + l18_length_code]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19489 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 23:33:00 +00:00
Chris Lattner
837caa7223
Comment out debug code :)
...
Select [mem] += Val operations. For constants, we used to get:
mov %ECX, -32768
add %ECX, DWORD PTR [l4_match_start]
mov DWORD PTR [l4_match_start], %ECX
Now we get:
add DWORD PTR [l4_match_start], -32768
For other values we used to get:
mov %EBP, %EDI ;; because the add destroys the value
add %EBP, DWORD PTR [l4_input_len]
mov DWORD PTR [l4_input_len], %EBP
now we get:
add DWORD PTR [l4_input_len], %EDI
Both of these use less registers than the alternative, are faster and smaller.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19488 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 23:21:30 +00:00
Chris Lattner
5f75d9a88c
Handle the global address case here, not just the offset case.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19487 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 22:58:43 +00:00
Chris Lattner
c4b6a78980
Treat int constants as not requiring a register, since they are almost always
...
folded into an instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19486 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 22:29:12 +00:00
Chris Lattner
a5ade060db
* Factor a bunch of binary operator cases into shared code.
...
* Fold loads into Add, sub, and, or, xor and mul when possible.
* Codegen shl X, 1 as add X, X
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19483 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 21:19:59 +00:00
Chris Lattner
947d544e29
Fold multiplies by 3,5,9 into addressing modes when possible.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19480 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 19:37:02 +00:00
Chris Lattner
51a263434a
Instead of generating stuff like this:
...
mov %ECX, %EAX
add %ECX, 32768
mov %SI, WORD PTR [2*%ECX + l13_prev]
Generate this:
mov %SI, WORD PTR [2*%ECX + l13_prev + 65536]
This occurs when you have a GEP instruction where an index is
"something + imm".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19472 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 06:36:20 +00:00
Chris Lattner
31805bf2b6
Implement MEMCPY natively in terms of rep movs*
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19468 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 06:19:26 +00:00
Chris Lattner
989de030c4
Implement memset -> rep stos*
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19467 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 06:14:36 +00:00
Chris Lattner
795069dd38
Announce that we don't support mem ops yet.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19466 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 05:57:36 +00:00
Chris Lattner
a95589be3f
Teach the address selector to make 'reg+reg' addressing modes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19457 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 04:40:19 +00:00
Chris Lattner
d4dab929d8
Emit NOT instructions.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19455 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 04:31:30 +00:00
Chris Lattner
6c07aee7c9
Fix a bug emitting branches that broke a lot of programs.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19452 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 04:06:27 +00:00
Chris Lattner
ef7ba0756b
Be more careful where we set ContainsFPCode. We were missing a set in the
...
int -> FP casting code. Note that we don't have to set it for FP operations
that take FP values as operands: whatever produces the FP value will set the
flag.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19451 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 03:50:45 +00:00
Chris Lattner
a3aa2e2882
Fix a major bug in setcc/cmov folding, where we accidentally
...
inverted the sense of the comparison.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19450 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 03:37:59 +00:00
Chris Lattner
1133309e57
Take register pressure into account when we have to decide whether to
...
evaluate the LHS or the RHS of an operation first. This causes good things
to happen. For example, instead of compiling a loop to this:
.LBBstrength_result7_1: # loopentry
movl 16(%esp), %edi
movl (%edi), %edi ;;; LOAD
movl (%ecx), %ebx
movl $2, (%eax,%ebx,4)
movl (%edx), %ebx
movl %esi, %ebp
addl $21, %ebp
addl $42, %esi
cmpl $0, %edi ;;; USE
cmovne %esi, %ebp
cmpl %ebp, %ebx
movl %ebp, %esi
jg .LBBstrength_result7_1
We now compile it to this:
.LBBstrength_result7_1: # loopentry
movl %edi, %ebx
addl $42, %ebx
addl $21, %edi
movl (%ecx), %ebp ;; LOAD
cmpl $0, %ebp ;; USE
cmovne %ebx, %edi
movl (%edx), %ebx
movl $2, (%eax,%ebx,4)
movl (%esi), %ebx
cmpl %edi, %ebx
jg .LBBstrength_result7_1
Which reduces register pressure enough (in this case) to avoid spilling in the
loop.
As another example, consider the CodeGen/X86/regpressure.ll testcase. We
used to generate this code for both cases:
regpressure1:
subl $32, %esp
movl %esi, 12(%esp)
movl %edi, 8(%esp)
movl %ebx, 4(%esp)
movl %ebp, (%esp)
movl 36(%esp), %ecx
movl (%ecx), %eax
movl 4(%ecx), %edx
movl %edx, 24(%esp)
movl 8(%ecx), %edx
movl %edx, 16(%esp)
movl 12(%ecx), %edx
movl 16(%ecx), %esi
movl 20(%ecx), %edi
movl 24(%ecx), %ebx
movl %ebx, 28(%esp)
movl 28(%ecx), %ebx
movl 32(%ecx), %ebp
movl %ebp, 20(%esp)
movl 36(%ecx), %ecx
imull 24(%esp), %eax
imull 16(%esp), %eax
imull %edx, %eax
imull %esi, %eax
imull %edi, %eax
imull 28(%esp), %eax
imull %ebx, %eax
imull 20(%esp), %eax
imull %ecx, %eax
movl (%esp), %ebp
movl 4(%esp), %ebx
movl 8(%esp), %edi
movl 12(%esp), %esi
addl $32, %esp
ret
This code is basically trying to do all of the loads first, then execute all
of the multiplies. Because we run out of registers, lots of spill code happens.
We now generate this code for both cases:
regpressure1:
movl 4(%esp), %ecx
movl (%ecx), %eax
movl 4(%ecx), %edx
imull %edx, %eax
movl 8(%ecx), %edx
imull %edx, %eax
movl 12(%ecx), %edx
imull %edx, %eax
movl 16(%ecx), %edx
imull %edx, %eax
movl 20(%ecx), %edx
imull %edx, %eax
movl 24(%ecx), %edx
imull %edx, %eax
movl 28(%ecx), %edx
imull %edx, %eax
movl 32(%ecx), %edx
imull %edx, %eax
movl 36(%ecx), %ecx
imull %ecx, %eax
ret
which is much nicer (when we fold loads into the muls it will be even better).
The old instruction selector used to produce the good code for regpressure1
but not for regpressure2, as it depended on the order of operations in the
LLVM code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19449 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11 03:11:44 +00:00
Chris Lattner
24aad1b0c1
Fold setcc instructions into selects.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19438 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-10 22:10:13 +00:00
Chris Lattner
57fbfb5879
Add conditional moves for the parity flag.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19437 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-10 22:09:33 +00:00
Chris Lattner
a13d3236d1
Implement 8-bit multiply for X86.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19435 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-10 20:55:48 +00:00
Chris Lattner
bd9f0eefb2
Codegen (Reg|imm)+&GV as an LEA, because we cannot put it into the immediate field
...
of an ADDri (due to current restrictions on MachineOperand :( ). This allows
us to generate:
leal Data+16000, %edx
instead of:
movl $Data, %edx
addl $16000, %edx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19420 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-09 20:20:29 +00:00
Chris Lattner
250208587d
Fix copy and pasto's for FP -> Int. This fixes fldry
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19418 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-09 19:49:59 +00:00
Chris Lattner
590d800a12
Initial implementation of FP->INT and INT->FP casts
...
Also, fix zero_extend from bool to i8, which fixes Shootout/objinst.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19414 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-09 18:52:44 +00:00
Chris Lattner
6e7c47c12d
Fix a subtle bug involving constant expr casts from int to fp
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19410 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-09 01:49:29 +00:00
Chris Lattner
1482458b23
Implement varargs and returnaddress/frameaddress intrinsics. With this
...
patch, all of SingleSource/UnitTests passes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19408 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-09 00:01:27 +00:00
Chris Lattner
b0802651bf
Okay 15th time is the charm. Looking at the vector size is useless as it
...
gets clobbered by a previous statement. This fixes all calls finally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19399 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 20:51:36 +00:00
Chris Lattner
6cc70ef0f9
Okay, my off by one was actually off by two. This fixes Generic/2003-07-07-BadLongConst.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19398 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 20:39:31 +00:00
Chris Lattner
ce45d65d9a
Fix off by one error
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19396 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 20:31:34 +00:00
Chris Lattner
5188ad735c
Adjust to changes in LowerCallTo interface
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Minor bugfixes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19376 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 19:28:19 +00:00
Chris Lattner
8c92628d1c
Wrap long line.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19367 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 06:59:50 +00:00
Chris Lattner
7ab65934a0
The X86 instruction selector already handles codegen of:
...
store float 123.45, float* %P
as an integer store. This adds handling of float immediate stores as integers
for arguments passed function calls.
This is now tested by CodeGen/X86/store-fp-constant.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19364 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 05:45:24 +00:00
Chris Lattner
18ad19488d
Allow the selection-dag based selector to be diabled with -disable-pattern-isel.
...
For now, this is the default, as the current selector is missing some big pieces.
To enable the new selector, pass -disable-pattern-isel=false to llc or lli.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19335 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-07 07:50:50 +00:00
Chris Lattner
8acb1ba04d
Reimplementation of the X86 pattern isel. This is still missing many large
...
pieces, but can already do amazing things in some cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19334 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-07 07:49:41 +00:00
Chris Lattner
d844d0128a
This file is now dead.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19333 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-07 07:49:05 +00:00
Chris Lattner
95cdb36714
Add a new prototype
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19332 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-07 07:48:33 +00:00
Chris Lattner
6ac95f9679
Codegen -1 and -0.0 more efficiently. This implements CodeGen/X86/negatize_zero.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19313 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-06 21:19:16 +00:00
Jeff Cohen
d01f65aea1
Fix CBE code so that it compiles with VC++.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19303 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-06 04:21:49 +00:00
Chris Lattner
5384b38ccc
1. If a double FP constant must be put into a constant pool, but it can be
...
precisely represented as a float, put it into the constant pool as a
float.
2. Use the cbw/cwd/cdq instructions instead of an explicit SAR for signed
division.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19291 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-05 16:30:14 +00:00
Chris Lattner
0539313fe5
Minor optimization to allocate R8 registers in a better order.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19289 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-05 16:09:16 +00:00
Jeff Cohen
1c32f79a82
Revert elimination of global variable hack... still needed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19273 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-03 16:34:19 +00:00
Chris Lattner
10197ff5cd
ADC and IMUL are also commutable.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19264 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-03 01:27:59 +00:00
Chris Lattner
35e5c7c186
This hunk:
...
- unsigned TrueValue = getReg(TrueVal, BB, BB->begin());
+ unsigned TrueValue = getReg(TrueVal);
Fixes the PPC regressions from last night.
The other hunk is just a clarity improvement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19263 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 23:07:31 +00:00
Jeff Cohen
40296bdf27
Eliminate the use of the global variable hack in the X86 target that was used
...
to get Visual Studio to link in X86.lib to the executables that need it. There
is another way of doing it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19252 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 04:23:12 +00:00
Chris Lattner
5aee0b97aa
Disable 2->3 address promotion of add and inc instructions to LEA's. In
...
addition to being three address, LEA's don't set the flags.
This fixes 186.crafty.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19251 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 04:18:17 +00:00
Chris Lattner
5dd350defd
Add a new method.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19249 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 02:38:18 +00:00
Chris Lattner
eb96ec52ff
Add support for SETNPr to lower to memory form.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19248 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 02:37:46 +00:00
Chris Lattner
bcea4d6f28
Implement the convertToThreeAddress method, add support for inverting JP/JNP
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branches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19247 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 02:37:07 +00:00
Chris Lattner
cc65beeb39
Two changes here:
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1. Add new instructions for checking parity flags: JP, JNP, SETP, SETNP.
2. Set the isCommutable and isPromotableTo3Address bits on several
instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19246 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 02:35:46 +00:00
Chris Lattner
273f2280f2
Add some bits that can be set for instructions.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19241 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-02 02:27:48 +00:00
Chris Lattner
6dec0b09d5
Fix a FIXME: Select instructions on longs were miscompiled.
...
While we're at it, improve codegen of select instructions. For this
testcase:
int %test(bool %C, int %A, int %B) {
%D = select bool %C, int %A, int %B
ret int %D
}
We used to generate this code:
_test:
cmpwi cr0, r3, 0
bne .LBB_test_2 ;
.LBB_test_1: ;
b .LBB_test_3 ;
.LBB_test_2: ;
or r5, r4, r4
.LBB_test_3: ;
or r3, r5, r5
blr
Now we emit:
_test:
cmpwi cr0, r3, 0
bne .LBB_test_2 ;
.LBB_test_1: ;
or r4, r5, r5
.LBB_test_2: ;
or r3, r4, r4
blr
-Chris
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19214 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-01 16:10:12 +00:00
Chris Lattner
e7f96c515e
Substantially improve the code generated by non-folded setcc instructions.
...
In particular, instead of compiling this:
bool %test(int %A, int %B) {
%C = setlt int %A, %B
ret bool %C
}
to this:
test:
save %sp, -96, %sp
subcc %i0, %i1, %g0
bl .LBBtest_1 !
nop
ba .LBBtest_2 !
nop
.LBBtest_1: !
or %g0, 1, %i0
ba .LBBtest_3 !
nop
.LBBtest_2: !
or %g0, 0, %i0
ba .LBBtest_3 !
nop
.LBBtest_3: !
restore %g0, %g0, %g0
retl
nop
We now compile it to this:
test:
save %sp, -96, %sp
subcc %i0, %i1, %g0
or %g0, 1, %i0
bl .LBBtest_2 !
nop
.LBBtest_1: !
or %g0, %g0, %i0
.LBBtest_2: !
restore %g0, %g0, %g0
retl
nop
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19213 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-01 16:06:57 +00:00
Chris Lattner
f376e5e5f6
Fix PR490
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Fix testcase CodeGen/CBackend/2004-12-28-LogicalConstantExprs.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19176 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-29 04:00:09 +00:00
Chris Lattner
6b4f501470
Remove unused enum value
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19024 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-17 22:41:46 +00:00
Chris Lattner
84c556e92a
Remove unused #include
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19021 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-17 19:07:04 +00:00
Chris Lattner
8cdbc35216
Change the sentinal
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19007 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-17 00:46:51 +00:00
Chris Lattner
11cf7aa775
Create a stack slot for the return address lazily instead of eagerly. This
...
save small amounts of time for functions that don't call llvm.returnaddress
or llvm.frameaddress (which is almost all functions).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19006 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-17 00:07:46 +00:00
Tanya Lattner
acd6782470
Chris is a pain ;) Removing reassociate.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19005 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-16 23:16:16 +00:00