Chris Lattner
9cc534f2dc
Don't forget the existing root.
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llvm-svn: 19531
2005-01-13 19:53:14 +00:00
Chris Lattner
cb4359465a
Initial trivial (but stupid) codegen for this node.
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llvm-svn: 19529
2005-01-13 18:01:36 +00:00
Chris Lattner
160fdb384b
Codegen independent ops as being independent.
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llvm-svn: 19528
2005-01-13 17:59:43 +00:00
Chris Lattner
37a5de6eb0
Legalize new node, add assertion.
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llvm-svn: 19527
2005-01-13 17:59:25 +00:00
Chris Lattner
86b19c5605
Print new node.
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llvm-svn: 19526
2005-01-13 17:59:10 +00:00
Chris Lattner
9a70166615
Add some really pedantic assertions to the load folding code. Fix a bunch
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of cases where we accidentally emitted a load folded once and unfolded
elsewhere.
llvm-svn: 19522
2005-01-13 05:53:16 +00:00
Chris Lattner
93cb0148f8
Do not fold (zero_ext (sign_ext V)) -> (sign_ext V), they are not the same.
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This fixes llvm-test/SingleSource/Regression/C/casts.c
llvm-svn: 19519
2005-01-12 18:51:15 +00:00
Chris Lattner
2ab70aafe0
We can only fold a load into an op if there is exactly one use of the value.
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Checking to see if the load has two uses is not equivalent, as the chain
value may have zero uses.
llvm-svn: 19518
2005-01-12 18:38:26 +00:00
Chris Lattner
e97b0e1358
New method
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llvm-svn: 19517
2005-01-12 18:37:47 +00:00
Chris Lattner
1b3b24f116
Fix sign extend to long. When coming from sbyte, we used to generate:
...
movsbl 4(%esp), %eax
movl %eax, %edx
sarl $7, %edx
Now we generate:
movsbl 4(%esp), %eax
movl %eax, %edx
sarl $31, %edx
Which is right.
llvm-svn: 19515
2005-01-12 18:19:52 +00:00
Chris Lattner
4b03f0f99e
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
llvm-svn: 19513
2005-01-12 18:08:53 +00:00
Reid Spencer
c8c50250a1
Shut up warnings with GCC 3.4.3 about uninitialized variables.
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llvm-svn: 19512
2005-01-12 14:53:45 +00:00
Chris Lattner
61c572eb7f
Fix a major miscompilation where we were overwriting the scale reg.
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llvm-svn: 19511
2005-01-12 07:33:20 +00:00
Chris Lattner
5816f1a302
Do not use the type of the RHS constant to determine the type of the operation.
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This fails for shifts because the constant is always 8 bits.
llvm-svn: 19508
2005-01-12 05:22:07 +00:00
Chris Lattner
89d6b21ae6
Do not lose the offset from teh global when peephole optimizing instructions.
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This fixes FreeBench/pcompress
llvm-svn: 19507
2005-01-12 05:17:28 +00:00
Chris Lattner
c9b64b9749
Silence VC++ warnings.
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llvm-svn: 19506
2005-01-12 04:51:37 +00:00
Jeff Cohen
614a5ec22a
Fix C++ more compilatiom errors
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llvm-svn: 19504
2005-01-12 04:29:05 +00:00
Chris Lattner
5ef92f3a40
Fix a compile error with VC++, which things that static const arrays need
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to be dynamically initialized. :(
llvm-svn: 19503
2005-01-12 04:23:22 +00:00
Chris Lattner
627c64e5e5
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.
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llvm-svn: 19502
2005-01-12 04:21:28 +00:00
Chris Lattner
a5f0ba59a0
Print a load of a null pointer (in intel mode) like this:
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mov %AX, WORD PTR [0]
instead of like this:
mov %AX, WORD PTR []
llvm-svn: 19501
2005-01-12 04:07:11 +00:00
Chris Lattner
360988bae2
Print a load of a null pointer like this:
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movw 0, %ax
instead of like this:
movw , %ax
llvm-svn: 19500
2005-01-12 04:05:19 +00:00
Chris Lattner
3c85c67c97
Fix a crash compiling povray on UINT_TO_FP from i16.
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llvm-svn: 19499
2005-01-12 04:00:00 +00:00
Chris Lattner
e7945a2e2e
Add an option to view the selection dags as they are generated.
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llvm-svn: 19498
2005-01-12 03:41:21 +00:00
Chris Lattner
4e72a2a000
There are no [mem] op= reg instructions for FP, so remove their entries.
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llvm-svn: 19496
2005-01-12 03:16:09 +00:00
Chris Lattner
00cb0ace9b
Fix a bug where we didn't insert FP_REG_KILL instructions into MBB's that
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contain FP PHI nodes but no other FP defining instructions. This fixes
183.equake
llvm-svn: 19495
2005-01-12 02:57:10 +00:00
Chris Lattner
92166ed1df
Fold TRUNCATE (LOAD P) into a smaller load from P.
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llvm-svn: 19494
2005-01-12 02:19:06 +00:00
Chris Lattner
258b23bd9d
Be more careful about order of arg evalution for CopyToReg nodes. This shrinks
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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. :(
llvm-svn: 19493
2005-01-12 02:02:48 +00:00
Chris Lattner
604416e8f4
Fold some more [mem] op= val operators. This allows us to things like this
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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
llvm-svn: 19492
2005-01-12 01:28:00 +00:00
Chris Lattner
e83ae1063f
Fold loads into sign/zero extends. instead of:
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mov %AL, BYTE PTR [%EDX + l18_length_code]
movzx %EAX, %AL
Emit:
movzx %EAX, BYTE PTR [%EDX + l18_length_code]
llvm-svn: 19489
2005-01-11 23:33:00 +00:00
Chris Lattner
87a38bd4a8
Comment out debug code :)
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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.
llvm-svn: 19488
2005-01-11 23:21:30 +00:00
Chris Lattner
282473a25d
Handle the global address case here, not just the offset case.
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llvm-svn: 19487
2005-01-11 22:58:43 +00:00
Chris Lattner
9eb2cc700b
Treat int constants as not requiring a register, since they are almost always
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folded into an instruction.
llvm-svn: 19486
2005-01-11 22:29:12 +00:00
Chris Lattner
74fcfd5148
Print the value types in the nodes of the graph
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llvm-svn: 19485
2005-01-11 22:21:04 +00:00
Chris Lattner
f588cdd51e
add an assertion, avoid creating copyfromreg/copytoreg pairs that are the
...
same for PHI nodes.
llvm-svn: 19484
2005-01-11 22:03:46 +00:00
Chris Lattner
7cb2220907
* Factor a bunch of binary operator cases into shared code.
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* Fold loads into Add, sub, and, or, xor and mul when possible.
* Codegen shl X, 1 as add X, X
llvm-svn: 19483
2005-01-11 21:19:59 +00:00
Chris Lattner
b1a72cb39a
Clear the whole array, always.
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llvm-svn: 19482
2005-01-11 20:25:26 +00:00
Chris Lattner
b838c9748e
Fold multiplies by 3,5,9 into addressing modes when possible.
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llvm-svn: 19480
2005-01-11 19:37:02 +00:00
Chris Lattner
8de5a27681
Squelch optimized warning.
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llvm-svn: 19475
2005-01-11 17:46:49 +00:00
Chris Lattner
e7b1130b01
Instead of generating stuff like this:
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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".
llvm-svn: 19472
2005-01-11 06:36:20 +00:00
Chris Lattner
bb63a09cd1
Implement MEMCPY natively in terms of rep movs*
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llvm-svn: 19468
2005-01-11 06:19:26 +00:00
Chris Lattner
b2b08a8bc1
Implement memset -> rep stos*
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llvm-svn: 19467
2005-01-11 06:14:36 +00:00
Chris Lattner
58816a9e81
Announce that we don't support mem ops yet.
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llvm-svn: 19466
2005-01-11 05:57:36 +00:00
Chris Lattner
963af6652b
Teach legalize to lower MEMSET/MEMCPY/MEMMOVE operations if the target
...
does not support them.
llvm-svn: 19465
2005-01-11 05:57:22 +00:00
Chris Lattner
6b9082114f
Print new operations.
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llvm-svn: 19464
2005-01-11 05:57:01 +00:00
Chris Lattner
7cde8a2658
Turn memset/memcpy/memmove into the corresponding operations.
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llvm-svn: 19463
2005-01-11 05:56:49 +00:00
Chris Lattner
f867443d7e
Teach the address selector to make 'reg+reg' addressing modes.
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llvm-svn: 19457
2005-01-11 04:40:19 +00:00
Reid Spencer
7e9642515c
Add the LOADABLE_MODULE=1 directive to indicate that this shared library is
...
intended to be a dlopenable module and not a "plain" shared library.
llvm-svn: 19456
2005-01-11 04:33:32 +00:00
Chris Lattner
edf06be50e
Emit NOT instructions.
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llvm-svn: 19455
2005-01-11 04:31:30 +00:00
Chris Lattner
2eacd11a86
shift X, 0 -> X
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llvm-svn: 19453
2005-01-11 04:25:13 +00:00
Chris Lattner
4e4bef2d6c
Fix a bug emitting branches that broke a lot of programs.
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llvm-svn: 19452
2005-01-11 04:06:27 +00:00