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721 Commits

Author SHA1 Message Date
Chris Lattner
76e2df2645 Patches towards fixing PR341 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14841 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-15 02:14:30 +00:00
Chris Lattner
d2995df5b7 Improve codegen for the LLVM offsetof/sizeof "operator". Before we compiled 
this LLVM function:

int %foo() {
        ret int cast (int** getelementptr (int** null, int 1) to int)
}

into:

foo:
        mov %EAX, 0
        lea %EAX, DWORD PTR [%EAX + 4]
        ret

now we compile it into:

foo:
        mov %EAX, 4
        ret

This sequence is frequently generated by the MSIL front-end, and soon the malloc lowering pass and
Java front-ends as well..

-Chris


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14834 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-15 00:58:53 +00:00
Chris Lattner
0cf0c37469 Delete the allocate*TargetMachine function, which is now dead . 
The shared command line options are now in a header that makes sense.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14756 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-11 04:17:10 +00:00
Chris Lattner
71d24aab2d Make these format a bit nicer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14747 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-11 03:27:42 +00:00
Chris Lattner
d36c970a11 Auto-registrate target 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14745 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-11 02:48:49 +00:00
Reid Spencer
954da37bb4 Add #include <iostream> since Value.h does not #include it any more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14622 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-04 12:19:56 +00:00
Chris Lattner
9a9ca0f06b Remove dead blocks 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14564 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-02 05:46:41 +00:00
Misha Brukman
c1f901c589 Fix associativity of parameters to assert(): now it actually makes sense. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14483 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-29 19:43:20 +00:00
Misha Brukman
e8d8fb26a6 Convert tabs to spaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14482 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-29 19:28:53 +00:00
Chris Lattner
23a53aa9c4 I believe that the code generator now properly handles dead basic blocks. If not, 
this is a bug, and should be fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14476 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-29 07:17:12 +00:00
Chris Lattner
8b486a114e Fix a regression from r1.224. In particular, codegen a cast from double -> 
float as a truncation by going through memory.  This truncation was being
skipped, which caused 175.vpr to fail after aggressive register promotion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14473 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-29 00:14:38 +00:00
Tanya Lattner
b140762a45 Made a fix so that you can print out MachineInstrs that belong to a MachineBasicBlock that is not yet attached to a MachineFunction. This change includes changing the third operand (TargetMachine) to a pointer for the MachineInstr::print function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14389 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-25 00:13:11 +00:00
Misha Brukman
66d6ee4247 Spell out `NoFramePointerElim' for readability. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14299 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-21 21:17:44 +00:00
Misha Brukman
83eaa0b567 Use the common `NoFPElim' setting instead of our own. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14298 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-21 21:10:24 +00:00
Chris Lattner
3048373748 Move the IntrinsicLowering header into the CodeGen directory, as per PR346 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14266 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-20 07:49:54 +00:00
Chris Lattner
667ea024b5 Codegen sub C, X a little bit better for register pressure. Instead of 
mov REG, C
sub REG, X

generate:

neg X
add X, C

which uses one less reg


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14213 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-18 00:50:37 +00:00
Chris Lattner
a6f9fe6dbc Fold setcc instructions into select and branches that are not in the same BB as 
the setcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14212 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-18 00:29:22 +00:00
Chris Lattner
ccd9796a46 Do not fold loads into instructions if it is used more than once. In particular 
we do not want to fold the load in cases like this:

  X = load
    = add A, X
    = add B, X


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14204 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-17 22:15:25 +00:00
Chris Lattner
f70c22b019 Rename Type::PrimitiveID to TypeId and ::getPrimitiveID() to ::getTypeID() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14201 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-17 18:19:28 +00:00
Chris Lattner
4adf066f99 Remove support for llvm.isnan. Alkis wins :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14189 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-15 21:48:07 +00:00
Chris Lattner
dc5724478e Add basic support for the isunordered intrinsic. The isnan stuff still needs to go 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14185 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-15 21:36:44 +00:00
Chris Lattner
01cdb1b367 By far, one of the most common uses of isnan is to make 'isunordered' 
comparisons.  In an 'isunordered' predicate, which looks like this at
the LLVM level:

        %a = call bool %llvm.isnan(double %X)
        %b = call bool %llvm.isnan(double %Y)
        %COM = or bool %a, %b

We used to generate this code:

        fxch %ST(1)
        fucomip %ST(0), %ST(0)
        setp %AL
        fucomip %ST(0), %ST(0)
        setp %AH
        or %AL, %AH

With this patch, we generate this code:

        fucomip %ST(0), %ST(1)
        fstp %ST(0)
        setp %AL

Which should make alkis happy.  Tested as X86/compare_folding.llx:test1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14148 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 05:33:49 +00:00
Chris Lattner
57790422ca Fix bug in previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14146 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 05:22:44 +00:00
Chris Lattner
899dbdcdb0 No really, these are dead now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14145 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 04:50:14 +00:00
Chris Lattner
0ca2c8e02c Now that compare instructions aren't lumped in with the other twoargfp instructions, 
we can get rid of the FpUCOM/FpUCOMi pseudo instructions, which makes stuff simpler
and faster.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14144 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 04:49:02 +00:00
Chris Lattner
ab8deccb82 Introduce a new FP instruction type to separate the compare cases from the 
twoarg cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14143 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 04:41:24 +00:00
Chris Lattner
b4fe76cbb5 Add direct support for the isnan intrinsic, implementing test/Regression/CodeGen/X86/isnan.llx 
testcase


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14141 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 04:31:10 +00:00
Chris Lattner
665e661384 Add support for the setp instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14140 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 04:30:06 +00:00
Chris Lattner
d62d5d7e5b Split compare instruction handling OUT of handleTwoArgFP into handleCompareFP. 
This makes the code much simpler, and the two cases really do belong apart.
Once we do it, it's pretty obvious how flawed the logic was for A != A case,
so I fixed it (fixing PR369).

This also uses freeStackSlotAfter instead of inserting an fxchg then
popStackAfter'ing in the case where there is a dead result (unlikely, but
possible), producing better code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14139 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-11 04:25:06 +00:00
Chris Lattner
32305f7763 Fix the fixed stack offset, patch contributed by Vladimir Prus 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14110 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-10 06:19:25 +00:00
John Criswell
6b5bd5857d Fix for PR#366. We use getClassB() so that we can handle cast instructions 
that cast to bool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14096 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-09 15:18:51 +00:00
Chris Lattner
994d7ae649 This file is obsolete 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14005 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-04 00:15:21 +00:00
Chris Lattner
d029cd2d5a Convert to the new TargetMachine interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13952 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-02 05:55:25 +00:00
Chris Lattner
99c59e8e21 Add support for accurate garbage collection to the LLVM code generators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13696 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-23 21:23:35 +00:00
Chris Lattner
df04097f87 Add some notes to myself, no functional changes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13695 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-23 21:23:12 +00:00
Chris Lattner
bbdbf30238 minor wording change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13694 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-23 21:22:55 +00:00
Brian Gaeke
09015d9468 Don't keep track of references to LLVM BasicBlocks while emitting; use 
MachineBasicBlocks instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13568 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-14 06:54:58 +00:00
Brian Gaeke
3fb5d1a6cc Support MachineBasicBlock operands on RawFrm instructions. 
Get rid of separate numbering for LLVM BasicBlocks; use the automatically
generated MachineBasicBlock numbering.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13567 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-14 06:54:57 +00:00
Brian Gaeke
9f088e481c Generate branch machine instructions with MachineBasicBlock operands instead of 
LLVM BasicBlock operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13566 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-14 06:54:56 +00:00
Chris Lattner
b7cb9ffd34 Two more improvements for null pointer handling: storing a null pointer 
and passing a null pointer into a function.

For this testcase:

void %test(int** %X) {
  store int* null, int** %X
  call void %test(int** null)
  ret void
}

we now generate this:

test:
        sub %ESP, 12
        mov %EAX, DWORD PTR [%ESP + 16]
        mov DWORD PTR [%EAX], 0
        mov DWORD PTR [%ESP], 0
        call test
        add %ESP, 12
        ret

instead of this:

test:
        sub %ESP, 12
        mov %EAX, DWORD PTR [%ESP + 16]
        mov %ECX, 0
        mov DWORD PTR [%EAX], %ECX
        mov %EAX, 0
        mov DWORD PTR [%ESP], %EAX
        call test
        add %ESP, 12
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13558 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-13 15:26:48 +00:00
Chris Lattner
9f1b531090 Second half of my fixed-sized-alloca patch. This folds the LEA to compute 
the alloca address into common operations like loads/stores.

In a simple testcase like this (which is just designed to excersize the
alloca A, nothing more):

int %test(int %X, bool %C) {
        %A = alloca int
        store int %X, int* %A
        store int* %A, int** %G
        br bool %C, label %T, label %F
T:
        call int %test(int 1, bool false)
        %V = load int* %A
        ret int %V
F:
        call int %test(int 123, bool true)
        %V2 = load int* %A
        ret int %V2
}

We now generate:

test:
        sub %ESP, 12
        mov %EAX, DWORD PTR [%ESP + 16]
        mov %CL, BYTE PTR [%ESP + 20]
***     mov DWORD PTR [%ESP + 8], %EAX
        mov %EAX, OFFSET G
        lea %EDX, DWORD PTR [%ESP + 8]
        mov DWORD PTR [%EAX], %EDX
        test %CL, %CL
        je .LBB2 # PC rel: F
.LBB1:  # T
        mov DWORD PTR [%ESP], 1
        mov DWORD PTR [%ESP + 4], 0
        call test
***     mov %EAX, DWORD PTR [%ESP + 8]
        add %ESP, 12
        ret
.LBB2:  # F
        mov DWORD PTR [%ESP], 123
        mov DWORD PTR [%ESP + 4], 1
        call test
***     mov %EAX, DWORD PTR [%ESP + 8]
        add %ESP, 12
        ret

Instead of:

test:
        sub %ESP, 20
        mov %EAX, DWORD PTR [%ESP + 24]
        mov %CL, BYTE PTR [%ESP + 28]
***     lea %EDX, DWORD PTR [%ESP + 16]
***     mov DWORD PTR [%EDX], %EAX
        mov %EAX, OFFSET G
        mov DWORD PTR [%EAX], %EDX
        test %CL, %CL
***     mov DWORD PTR [%ESP + 12], %EDX
        je .LBB2 # PC rel: F
.LBB1:  # T
        mov DWORD PTR [%ESP], 1
        mov %EAX, 0
        mov DWORD PTR [%ESP + 4], %EAX
        call test
***     mov %EAX, DWORD PTR [%ESP + 12]
***     mov %EAX, DWORD PTR [%EAX]
        add %ESP, 20
        ret
.LBB2:  # F
        mov DWORD PTR [%ESP], 123
        mov %EAX, 1
        mov DWORD PTR [%ESP + 4], %EAX
        call test
***     mov %EAX, DWORD PTR [%ESP + 12]
***     mov %EAX, DWORD PTR [%EAX]
        add %ESP, 20
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13557 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-13 15:12:43 +00:00
Chris Lattner
cb2fd557ee Substantially improve code generation for address exposed locals (aka fixed 
sized allocas in the entry block).  Instead of generating code like this:

entry:
  reg1024 = ESP+1234
... (much later)
  *reg1024 = 17


Generate code that looks like this:
entry:
  (no code generated)
... (much later)
  t = ESP+1234
  *t = 17

The advantage being that we DRAMATICALLY reduce the register pressure for these
silly temporaries (they were all being spilled to the stack, resulting in very
silly code).  This is actually a manual implementation of rematerialization :)

I have a patch to fold the alloca address computation into loads & stores, which
will make this much better still, but just getting this right took way too much time
and I'm sleepy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13554 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-13 07:40:27 +00:00
Chris Lattner
2b10b08ad6 Pass boolean constants into function calls more efficiently, generating: 
mov DWORD PTR [%ESP + 4], 1

instead of:

        mov %EAX, 1
        mov DWORD PTR [%ESP + 4], %EAX


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13494 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-12 16:35:04 +00:00
Chris Lattner
c81e6bae88 Fix a fairly serious pessimizaion that was preventing us from efficiently 
compiling things like 'add long %X, 1'.  The problem is that we were switching
the order of the operands for longs even though we can't fold them yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13451 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-10 15:15:55 +00:00
Chris Lattner
9984fd0df9 Fix some comments, avoid sign extending booleans when zero extend works fine 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13440 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 23:16:33 +00:00
Chris Lattner
96e3b426d5 Generate more efficient code for casting booleans to integers (no sign extension required) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13439 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 22:28:45 +00:00
Chris Lattner
e7a31c98db Codegen floating point stores of constants into integer instructions. This 
allows us to compile:

store float 10.0, float* %P

into:
        mov DWORD PTR [%EAX], 1092616192

instead of:

.CPItest_0:                                     # float 0x4024000000000000
.long   1092616192      # float 10
...
        fld DWORD PTR [.CPItest_0]
        fstp DWORD PTR [%EAX]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13409 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 21:18:15 +00:00
Chris Lattner
260195d2b1 Make comparisons against the null pointer as efficient as integer comparisons 
against zero.  In particular, don't emit:

        mov %ESI, 0
        cmp %ECX, %ESI

instead, emit:

       test %ECX, %ECX


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13407 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 19:55:55 +00:00
Chris Lattner
bbc130d110 Remove unneeded check 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13355 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 19:35:11 +00:00
Chris Lattner
c8af02c403 Improve signed division by power of 2 *dramatically* from this: 
div:
        mov %EDX, DWORD PTR [%ESP + 4]
        mov %ECX, 64
        mov %EAX, %EDX
        sar %EDX, 31
        idiv %ECX
        ret

to this:

div:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        sar %ECX, 5
        shr %ECX, 26
        mov %EDX, %EAX
        add %EDX, %ECX
        sar %EAX, 6
        ret

Note that the intel compiler is currently making this:

div:
        movl      4(%esp), %edx                                 #3.5
        movl      %edx, %eax                                    #4.14
        sarl      $5, %eax                                      #4.14
        shrl      $26, %eax                                     #4.14
        addl      %edx, %eax                                    #4.14
        sarl      $6, %eax                                      #4.14
        ret                                                     #4.14

Which has one less register->register copy.  (hint hint alkis :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13354 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 19:33:58 +00:00