Commit Graph

32 Commits

Author SHA1 Message Date
Chris Lattner
ffbf667718 Iterate over the Machine CFG that Brian added instead of the LLVM CFG.
Look at all of the pretty minuses. :)

llvm-svn: 13303
2004-05-01 21:27:53 +00:00
Chris Lattner
64431dbce7 This is the real fix for Codegen/X86/2004-04-13-FPCMOV-Crash.llx which works
even when the "optimization" I added before is turned off.  It generates this
extremely pointless code:

test:
        fld QWORD PTR [%ESP + 4]
        mov %AL, 0
        test %AL, %AL
        fcmove %ST(0), %ST(0)
        ret

Good thing the optimizer will have removed this before code generation
anyway.  :)

llvm-svn: 12939
2004-04-14 02:42:32 +00:00
Chris Lattner
43f754339a Fix issues that the local allocator has dealing with instructions that implicitly use ST(0)
llvm-svn: 12855
2004-04-12 03:02:48 +00:00
Chris Lattner
c85d92e0b7 Add support for the FUCOMIr instruction
llvm-svn: 12851
2004-04-12 01:39:15 +00:00
Chris Lattner
a0681183b6 Relax assertion to make this function work with a broader class of instructions
llvm-svn: 12836
2004-04-11 20:21:06 +00:00
Chris Lattner
b6e4e5a95e Simplify code by using the more powerful BuildMI forms.
Implement a small optimization.  In test/Regression/CodeGen/X86/select.ll,
we now generate this for foldSel3:

foldSel3:
        mov %AL, BYTE PTR [%ESP + 4]
        fld DWORD PTR [%ESP + 8]
        fld DWORD PTR [%ESP + 12]
        mov %EAX, DWORD PTR [%ESP + 16]
        mov %ECX, DWORD PTR [%ESP + 20]
        cmp %EAX, %ECX
        fxch %ST(1)
        fcmovae %ST(0), %ST(1)
***     fstp %ST(1)
        ret

Instead of:

foldSel3:
        mov %AL, BYTE PTR [%ESP + 4]
        fld DWORD PTR [%ESP + 8]
        fld DWORD PTR [%ESP + 12]
        mov %EAX, DWORD PTR [%ESP + 16]
        mov %ECX, DWORD PTR [%ESP + 20]
        cmp %EAX, %ECX
        fxch %ST(1)
        fcmovae %ST(0), %ST(1)
***     fxch %ST(1)
***     fstp %ST(0)
        ret

In practice, this only effects code size: performance should be basically
unaffected.

llvm-svn: 12588
2004-04-01 04:06:09 +00:00
Chris Lattner
d50df93168 Add support for floating point conditional move instructions
llvm-svn: 12576
2004-03-31 22:02:36 +00:00
Alkis Evlogimenos
7ecfe0a839 A big X86 instruction rename. The instructions are renamed to make
their names more decriptive. A name consists of the base name, a
default operand size followed by a character per operand with an
optional special size. For example:

ADD8rr -> add, 8-bit register, 8-bit register

IMUL16rmi -> imul, 16-bit register, 16-bit memory, 16-bit immediate

IMUL16rmi8 -> imul, 16-bit register, 16-bit memory, 8-bit immediate

MOVSX32rm16 -> movsx, 32-bit register, 16-bit memory

llvm-svn: 11995
2004-02-29 08:50:03 +00:00
Alkis Evlogimenos
e8dac99a43 Floating point loads/stores act on memory operands. Rename them to
denote this fact.

llvm-svn: 11971
2004-02-28 23:42:35 +00:00
Alkis Evlogimenos
fc768e6db0 Fix problem in DEBUG code. I could be pointing past the end and
dereferencing it causes an assertion error.

llvm-svn: 11458
2004-02-15 00:46:41 +00:00
Alkis Evlogimenos
a31a767307 Use newly added next() and prior() utility functions.
llvm-svn: 11430
2004-02-14 01:18:34 +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
d58b38eeca Don't use MachineOperator::is(Phys|Virt)Register
llvm-svn: 11276
2004-02-10 20:31:28 +00:00
Chris Lattner
8b623358ff Add support for one argument OneArgFP instructions
llvm-svn: 11094
2004-02-03 07:27:34 +00:00
Chris Lattner
36367e8c90 Add support for OneArgFPRW instructions, fix a couple of typeos
llvm-svn: 11077
2004-02-02 19:23:15 +00:00
Chris Lattner
f5b5d1f2f8 Add some comments sketching out how this is to work eventually.
llvm-svn: 11026
2004-01-30 22:25:18 +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
Chris Lattner
ea52ffdb10 Fix memory leak in the stackifier, due to the machinebasicblocks not holding
instructions on an ilist

llvm-svn: 10556
2003-12-20 10:12:17 +00:00
Chris Lattner
544d512d4f Finegrainify namespacification
Minor cleanups to killer pass

llvm-svn: 10555
2003-12-20 09:58:55 +00:00
Alkis Evlogimenos
b96436e679 Change preserve all claim to just preserve live variables and phielimination.
llvm-svn: 10460
2003-12-14 10:14:23 +00:00
Alkis Evlogimenos
5ca15c8f5e Add a floating point killer pass. This pass runs before register
allocaton on the X86 to add information to the machine code denoting
that our floating point stackifier cannot handle virtual point
register that are alive across basic blocks. This pass adds an
implicit def of all virtual floating point register at the end of each
basic block.

llvm-svn: 10446
2003-12-13 05:36:22 +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
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
Misha Brukman
868eac95dd Fix spelling.
llvm-svn: 9027
2003-10-10 17:57:28 +00:00
Misha Brukman
56f7db4178 Spell `necessary' correctly.
llvm-svn: 7944
2003-08-18 14:43:39 +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
21c04e759f Resort tables
llvm-svn: 7541
2003-08-03 21:56:36 +00:00
Chris Lattner
25e28f61ab Set debug types
llvm-svn: 7532
2003-08-03 21:14:38 +00:00
Chris Lattner
1baa706ab7 Move DEBUG to Debug.h
llvm-svn: 7497
2003-08-01 22:21:34 +00:00
Brian Gaeke
6f2c46cd52 Nice tasty llc fixes. These should fix LLC for x86 for everything in
SingleSource except oopack and Oscar.  (Sorry, Oscar.)

include/llvm/Target/TargetInstrInfo.h: Remove virtual print method. Add
 accessors for ImplicitUses/Defs.
lib/Target/TargetInstrInfo.cpp: Remove virtual print method. If you
 really wanted this, just use MI->print(O, TM); instead...
lib/Target/X86:
FloatingPoint.cpp: ...like this.
X86InstrInfo.h: Remove virtual print method. Define the PrintImplUses
 target-specific flag bit.
X86InstrInfo.def: Add the PrintImplUses flag to all the instructions
 which implicitly use CL, because the assembler needs to see the CL in
 order to generate the right instruction.
Printer.cpp: Ditch fnIndex at Chris's request. Now we use CurrentFnName
  to name constants in the constant pool for each function instead. This
  avoids keeping state between runOnMachineFunction() invocations, which
  is a no-no. Having MangledGlobals be global is a bogon I'd like to get
  rid of too, but making it a static member of Printer causes link errors
  (why???).
 Make NumberForBB into a member of Printer instead of a global, too.
 Make printOp and printMemReference into methods of Printer.
 X86InstrInfo::print is now Printer::printMachineInstruction, because
  TargetInstrInfo::print is history. (Because of this, we have to qualify
  the names of some TargetInstrInfo methods we call.)
 Print out the ImplicitUses field of any instruction we print that has
  the PrintImplUses bit set.

llvm-svn: 6924
2003-06-27 00:00:48 +00:00
Chris Lattner
b27d60ccf1 Rename MachineInstrInfo -> TargetInstrInfo
llvm-svn: 5272
2003-01-14 22:00:31 +00:00
Chris Lattner
fe32c9841d New files
llvm-svn: 5260
2003-01-13 01:01:59 +00:00