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157 Commits

Author SHA1 Message Date
Chris Lattner
bc565b2a6c There is no need to emit a shift if the size is constant, which is common 
llvm-svn: 11420
 2004-02-13 23:36:47 +00:00
Chris Lattner
d1c4f4c833 Add support for the rep movs[bwd] instructions, and emit them when code 
generating the llvm.memcpy intrinsic.

llvm-svn: 11351
 2004-02-12 17:53:22 +00:00
Alkis Evlogimenos
b755d35fd2 Change MachineBasicBlock's vector of MachineInstr pointers into an 
ilist of MachineInstr objects. This allows constant time removal and
insertion of MachineInstr instances from anywhere in each
MachineBasicBlock. It also allows for constant time splicing of
MachineInstrs into or out of MachineBasicBlocks.

llvm-svn: 11340
 2004-02-12 02:27:10 +00:00
Chris Lattner
16690fad3d Adjust to the changed StructType interface. In particular, getElementTypes() is gone. 
llvm-svn: 11228
 2004-02-09 04:37:31 +00:00
Chris Lattner
92211eb77d Generate ftst instructions for comparison against zero 
llvm-svn: 11098
 2004-02-03 18:54:04 +00:00
Chris Lattner
71c12c8e0d Generate the fchs instruction to negate a floating point number 
llvm-svn: 11078
 2004-02-02 19:31:38 +00:00
Chris Lattner
963082346c Codegen -0.0 correctly. Do not use fldz! This is another -0.0 == +0.0 problem, arg. 
llvm-svn: 11070
 2004-02-02 18:56:30 +00:00
Chris Lattner
6f4945b965 Add (currently disabled) support to the instruction selector to only insert 
FP_REG_KILL instructions at the end of blocks involved with critical edges.

Fix a bug where FP_REG_KILL instructions weren't inserted in fall through
unconditional branches.  Perhaps this will fix some linscan problems?

llvm-svn: 11019
 2004-01-30 22:13:44 +00:00
Alkis Evlogimenos
44747c570a Output mov %REG = 0 instead of xor %REG, %REG, %REG to clear a 
register so that LiveVariable analysis is not confused.

llvm-svn: 10773
 2004-01-12 07:22:45 +00:00
Chris Lattner
c37577eb9f Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering 
implementation from the TargetMachine directly.

llvm-svn: 10636
 2003-12-28 21:23:38 +00:00
Chris Lattner
c487970d6b Whoops, don't try to lower non intrinsic calls 
llvm-svn: 10632
 2003-12-28 09:53:23 +00:00
Chris Lattner
1791047661 implement support for the intrinsic lowering functionality 
llvm-svn: 10629
 2003-12-28 09:47:19 +00:00
Alkis Evlogimenos
0e892b6337 Move FP_REG_KILL closer to the return instruction. 
llvm-svn: 10567
 2003-12-21 16:47:43 +00:00
Alkis Evlogimenos
7b61337ce6 Move FP_REG_KILL closer to the actual branch instruction. 
llvm-svn: 10563
 2003-12-20 17:28:15 +00:00
Alkis Evlogimenos
41bd8284e3 Remove floating point killer pass. This is now implemented in the 
instruction selector by adding a new pseudo-instruction
FP_REG_KILL. This instruction implicitly defines all x86 fp registers
and is a terminator so that passes which add machine code at the end
of basic blocks (like phi elimination) do not add instructions between
it and the branch or return instruction.

llvm-svn: 10562
 2003-12-20 16:22:59 +00:00
Brian Gaeke
296546cf0c Constant shift expressions, meet InstSelectSimple. Yow!! 
llvm-svn: 10170
 2003-11-22 06:49:41 +00:00
Brian Gaeke
8c4c9f6f1e Stub for constant shift expr support. 
llvm-svn: 10168
 2003-11-22 05:18:35 +00:00
Chris Lattner
6677af8dee Fix PR123 
llvm-svn: 10069
 2003-11-18 17:47:05 +00:00
Brian Gaeke
d25f86d683 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
Chris Lattner
0e32494c79 Delete unused EmitByteSwap method 
Implement mul/div/rem constant expressions

llvm-svn: 9424
 2003-10-23 17:21:43 +00:00
Misha Brukman
0f649c0045 * Order includes according to style guide 
* Convert tabs to spaces
* Make code fit within 80 columns

llvm-svn: 9416
 2003-10-23 16:22:08 +00:00
John Criswell
b402729b30 Added LLVM project notice to the top of every C++ source file. 
Header files will be on the way.

llvm-svn: 9298
 2003-10-20 19:43:21 +00:00
Chris Lattner
c83d8249cb Further cleanups and simplifications 
llvm-svn: 9282
 2003-10-20 04:48:06 +00:00
Chris Lattner
fce0650cee Eliminate code for pointer size and endianness emulation. 
llvm-svn: 9281
 2003-10-20 04:11:23 +00:00
Chris Lattner
5a577c0b28 * Rename X86::IMULr16 -> X86::IMULrr16 
* Implement R1 = R2 * C where R1 and R2 are 32 or 16 bits. This avoids an
  extra copy into a register, reducing register pressure.

llvm-svn: 9278
 2003-10-20 03:42:58 +00:00
Chris Lattner
3d519c7bab * Multiplications by 2^X are turned into shifts. This factors code out of the 
getelementptr code path for use by other code paths (like malloc and alloca).
* Optimize comparisons with zero
* Generate neg, not, inc, and dec instructions, when possible.

This gives some code size wins, which might translate into performance.  We'll
see tommorow in the nightly tester.

llvm-svn: 9267
 2003-10-19 21:09:10 +00:00
Chris Lattner
de87c8a892 Fix bug: Jello/2003-10-18-PHINode-ConstantExpr-CondCode-Failure.llx 
This also fixes miscompilation of 176.gcc.

llvm-svn: 9249
 2003-10-19 00:26:11 +00:00
Chris Lattner
0a276257ae Add support for the new varargs intrinsics 
llvm-svn: 9224
 2003-10-18 05:56:40 +00:00
Chris Lattner
f2ed60c0b7 Decrease usage of use_size() 
llvm-svn: 9135
 2003-10-15 16:48:29 +00:00
Misha Brukman
868eac95dd Fix spelling. 
llvm-svn: 9027
 2003-10-10 17:57:28 +00:00
Chris Lattner
fc3f9605a7 Instead of hacking in custom support for Invoke/Unwind, use the LowerInvoke pass 
llvm-svn: 8871
 2003-10-05 19:15:47 +00:00
Chris Lattner
e8ae7bf114 Eliminate support for the llvm.unwind intrinisic, using the Unwind instruction instead 
llvm-svn: 8411
 2003-09-08 19:44:26 +00:00
Chris Lattner
4ad8720f91 Add support for the unwind instruction 
llvm-svn: 8408
 2003-09-08 18:54:55 +00:00
Chris Lattner
062cc9d341 Add support for the llvm.unwind intrinsic, which we codegen to just do an abort 
until we implement unwinding.
Add support for the invoke instruction, which codegens just like a call with
a branch after it.

The end effect of this change is that programs using the invoke instruction,
but never unwinding, will work fine.  Programs that unwind will abort until
we get unwind support.

llvm-svn: 8187
 2003-08-28 21:23:43 +00:00
Chris Lattner
d627d84e23 Implement: Jello/test-constantexpr.ll 
llvm-svn: 8127
 2003-08-24 19:19:47 +00:00
Chris Lattner
f54b131a49 Add support for the sig(set|long)jmp intrinsics 
llvm-svn: 7951
 2003-08-18 16:06:09 +00:00
Brian Gaeke
77c65be59e Factory methods for FunctionPasses now return type FunctionPass *. 
llvm-svn: 7823
 2003-08-13 18:18:15 +00:00
Chris Lattner
17fc21b5fa This is the real fix for the previous register allocator problem. 
Physical registers should not float around.

llvm-svn: 7587
 2003-08-05 00:48:47 +00:00
Chris Lattner
15891a50c1 Fix Bug: test/Regression/Jello/2003-08-03-CallArgLiveRanges.llx 
llvm-svn: 7558
 2003-08-04 02:12:48 +00:00
Chris Lattner
cf28d0f799 Use target specific interface instead of forcing it to be target-generic 
llvm-svn: 7413
 2003-07-30 05:33:48 +00:00
Chris Lattner
40cc4c1392 Rename function to be more consistent with filename 
llvm-svn: 7352
 2003-07-26 23:49:58 +00:00
Chris Lattner
b92653f037 If the pass changes _anything_ it must return true 
llvm-svn: 7344
 2003-07-26 23:05:37 +00:00
Chris Lattner
6ad460b336 Simplify code by using ConstantInt::getRawValue instead of checking to see 
whether the constant is signed or unsigned, then casting

llvm-svn: 7252
 2003-07-23 15:22:26 +00:00
Brian Gaeke
bf46d75365 Please, save your applause^H^H^H^H^H^H^H^Hflames for the end... 
Avoid a fall-through in the (stubby) treatment of the longjmp intrinsic
call which causes llc & lli to core-dump.

Add a sort-of treatment of cast double to ulong. I am not really sure
what a user should expect to see upon casting a negative FP value to
unsigned long long. But with what is given here, I was able to write
a program that could cast -123.456 to ulong and back and get -123.0,
which seems like a step in the right direction.  GCC seems to give you
0. I don't know if I'd consider that useful.

These cases were coming up in GNU coreutils-5.0.

llvm-svn: 7205
 2003-07-18 20:23:43 +00:00
Brian Gaeke
638e6ef31c Use getClassB for load and store; we don't want to abort when we 
try to load or store through a bool*.

llvm-svn: 7195
 2003-07-17 21:30:06 +00:00
Chris Lattner
d212141d9e Setjmp should always return zero if we don't implement longjmp. This avoids 
leaving trash in the register, fixing anagram

llvm-svn: 7013
 2003-06-30 19:35:54 +00:00
Chris Lattner
6b31a873ee Until there is a setjmp/longjmp transformation pass, codegen setjmp as a noop 
and longjmp as an abort!

llvm-svn: 6977
 2003-06-29 16:42:32 +00:00
Chris Lattner
38b7729915 Do not use the inefficient, fixed function, CBW, CDQ, ... instructions 
llvm-svn: 6844
 2003-06-22 03:31:18 +00:00
Chris Lattner
7fb273d416 Minor simplification to 64-bit instsel 
llvm-svn: 6831
 2003-06-21 18:15:27 +00:00
Chris Lattner
2840a1b4ee For 16 and 32-bit multiplies, use the IMUL instruction instead of the MUL instruction. 
This allows us to not force the use of the EAX/AX registers!

llvm-svn: 6830
 2003-06-21 17:16:58 +00:00