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3331 Commits

Author SHA1 Message Date
Chris Lattner
31a972dc23 one more hunk that got dropped 
llvm-svn: 22596
 2005-08-02 19:35:29 +00:00
Chris Lattner
75a8a64de4 This hunk accidentally got dropped. Patch by Jim Laskey 
llvm-svn: 22595
 2005-08-02 19:30:55 +00:00
Chris Lattner
cc8ae687e1 Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!

llvm-svn: 22594
 2005-08-02 19:26:06 +00:00
Chris Lattner
3a81e0795b add a pass name to make debugging dumps nicer 
llvm-svn: 22588
 2005-08-02 19:07:49 +00:00
Andrew Lenharth
913742c65f update function codes to reflect /su flags that have been added since this was written 
llvm-svn: 22571
 2005-08-01 20:06:01 +00:00
Andrew Lenharth
0d65956c61 use llabs not abs 
llvm-svn: 22569
 2005-08-01 17:47:28 +00:00
Jeff Cohen
019104459d Keep tabs and trailing spaces out. 
llvm-svn: 22565
 2005-07-30 18:33:25 +00:00
Chris Lattner
11be5c11d5 fix a typeo 
llvm-svn: 22561
 2005-07-30 00:43:00 +00:00
Chris Lattner
a681fc64d6 Change the fp to integer code to not perform 2-byte stores followed by 
1 byte loads and other operations.  This is bad for store-forwarding on
common CPUs.  We now do this:

fnstcw WORD PTR [%ESP]
mov %AX, WORD PTR [%ESP]

instead of:

fnstcw WORD PTR [%ESP]
mov %AL, BYTE PTR [%ESP + 1]

llvm-svn: 22559
 2005-07-30 00:17:52 +00:00
Chris Lattner
cf208334d9 Use a custom expander for all FP to int conversions, as the X86 only has 
FP-to-int-in-memory: this exposes the load from the stored slot to the
selection dag, allowing it to be folded into other operaions.

llvm-svn: 22556
 2005-07-30 00:05:54 +00:00
Andrew Lenharth
3a7dc9f0bd turn off GOT on archs that didn't use it (not that it appeard to harm them much with it on) 
llvm-svn: 22553
 2005-07-29 23:32:02 +00:00
Chris Lattner
2aa847898d Implement a FIXME: move a bunch of cruft for handling FP_TO_*INT operations 
that the X86 does not support to the legalizer.  This allows it to be better
optimized, etc, and will help with SSE support.

llvm-svn: 22551
 2005-07-29 01:00:29 +00:00
Chris Lattner
9db78c43c5 Don't forget to diddle with the control word when performing an FISTP64. 
llvm-svn: 22550
 2005-07-29 00:54:34 +00:00
Chris Lattner
a30d4be57d Use a custom expander to compile this: 
long %test4(double %X) {
        %tmp.1 = cast double %X to long         ; <long> [#uses=1]
        ret long %tmp.1
}

to this:

_test4:
        sub %ESP, 12
        fld QWORD PTR [%ESP + 16]
        fistp QWORD PTR [%ESP]
        mov %EDX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP]
        add %ESP, 12
        ret

instead of this:

_test4:
        sub %ESP, 28
        fld QWORD PTR [%ESP + 32]
        fstp QWORD PTR [%ESP]
        call ___fixdfdi
        add %ESP, 28
        ret

llvm-svn: 22549
 2005-07-29 00:40:01 +00:00
Andrew Lenharth
0fcc129f80 support bsr, and more .td simplification 
llvm-svn: 22543
 2005-07-28 18:14:47 +00:00
Andrew Lenharth
5a08d95904 get lazy JITing working. Some of shootout runs now 
llvm-svn: 22538
 2005-07-28 12:45:20 +00:00
Chris Lattner
5d02e3a15e Eliminate an extra copy from R1 that Nate noticed on function calls that 
have to write arguments to the stack

llvm-svn: 22536
 2005-07-28 05:23:43 +00:00
Chris Lattner
a9dac1cd7a Specify the correct number of operands 
llvm-svn: 22535
 2005-07-28 04:42:11 +00:00
Nate Begeman
b125feb99f Fold constant adds into loads and stores to frame indices. 
For the following code:
double %ext(int %A.0__, long %A.1__) {
        %A_addr = alloca %typedef.DComplex              ; <%typedef.DComplex*> [#uses=2]
        %tmp.1 = cast %typedef.DComplex* %A_addr to int*                ; <int*> [#uses=1]
        store int %A.0__, int* %tmp.1
        %tmp.2 = getelementptr %typedef.DComplex* %A_addr, int 0, uint 1                ; <double*> [#uses=2]
        %tmp.3 = cast double* %tmp.2 to long*           ; <long*> [#uses=1]
        store long %A.1__, long* %tmp.3
        %tmp.5 = load double* %tmp.2            ; <double> [#uses=1]
        ret double %tmp.5
}

We now generate:
_ext:
.LBB_ext_0:     ;
        stw r3, -12(r1)
        stw r4, -8(r1)
        stw r5, -4(r1)
        lfd f1, -8(r1)
        blr

Instead of:
_ext:
.LBB_ext_0:     ;
        stw r3, -12(r1)
        addi r2, r1, -12
        stw r4, 4(r2)
        stw r5, 8(r2)
        lfd f1, 4(r2)
        blr

This also fires hundreds of times on MultiSource.

llvm-svn: 22533
 2005-07-28 03:02:05 +00:00
Nate Begeman
d230bf7242 Fix some comments 
llvm-svn: 22530
 2005-07-27 23:11:27 +00:00
Jeff Cohen
bd51ec7461 Eliminate all remaining tabs and trailing spaces. 
llvm-svn: 22523
 2005-07-27 06:12:32 +00:00
Nate Begeman
54792213a7 Implement the optimization for the Red Zone on Darwin. This removes the 
unnecessary SP manipulation in leaf routines that don't need it.

llvm-svn: 22522
 2005-07-27 06:06:29 +00:00
Chris Lattner
d9239c4ae0 fix some warnings when compiled with 32-bit hosts 
llvm-svn: 22521
 2005-07-27 05:58:01 +00:00
Jeff Cohen
81980781a1 Eliminate tabs and trailing spaces. 
llvm-svn: 22520
 2005-07-27 05:53:44 +00:00
Chris Lattner
9c98c4366a add a note about the red zone 
llvm-svn: 22518
 2005-07-26 19:07:51 +00:00
Chris Lattner
2e2dd83e7d Wrap some long lines, fix emission of weak global variables 
llvm-svn: 22517
 2005-07-26 19:03:27 +00:00
Nate Begeman
cd48821a69 Update the PPC readme 
llvm-svn: 22516
 2005-07-26 18:59:06 +00:00
Nate Begeman
19014db53f Fix an optimization put in for accessing static globals. This obviates 
the need to build PIC.

llvm-svn: 22512
 2005-07-25 21:15:28 +00:00
Andrew Lenharth
14ff2e9791 fix compile error 
llvm-svn: 22508
 2005-07-23 07:46:48 +00:00
Chris Lattner
dd14de5a1e PowerPC no-pic code is not quite ready for prime-time 
llvm-svn: 22507
 2005-07-22 22:58:34 +00:00
Andrew Lenharth
b6f81cea2f Handle more imm forms, and load small negative i32 constants without hitting memory (should do the same for arbitrary zero extended small negative constants) 
llvm-svn: 22505
 2005-07-22 22:24:01 +00:00
Andrew Lenharth
5732bc768f finally found the gcc defined constants 
llvm-svn: 22502
 2005-07-22 21:00:30 +00:00
Andrew Lenharth
ba955f96e3 Alpha JIT (beta) 
llvm-svn: 22500
 2005-07-22 20:52:16 +00:00
Andrew Lenharth
653f21b2cd simpilfy instruction encoding (and make the lines way shorter, aka Misha happification) 
llvm-svn: 22499
 2005-07-22 20:50:29 +00:00
Andrew Lenharth
0e1c0e7c79 update interface 
llvm-svn: 22498
 2005-07-22 20:49:37 +00:00
Nate Begeman
7259cc60c4 Support building non-PIC 
Remove the LoadHiAddr pseudo-instruction.
Optimization of stores to and loads from statics.
Force JIT to use new non-PIC codepaths.

llvm-svn: 22494
 2005-07-21 20:44:43 +00:00
Chris Lattner
1766305e60 revert to using 4-byte alignment for doubles, as specified by the ABI 
llvm-svn: 22493
 2005-07-21 19:17:18 +00:00
Nate Begeman
95421ab212 Support assembling fsqrt on darwin. This will be implemented better when 
PowerPC gets subtarget support up.

llvm-svn: 22489
 2005-07-21 01:25:49 +00:00
Nate Begeman
ae843fcefe Generate mfocrf when targeting g5. Generate fsqrt/fsqrts when targetin g5. 
8-byte align doubles.

llvm-svn: 22486
 2005-07-20 22:42:00 +00:00
Nate Begeman
b83789d611 Integrate SelectFPExpr into SelectExpr. This gets PPC32 closer to being 
automatically generated from a target description.

llvm-svn: 22470
 2005-07-19 16:51:05 +00:00
Reid Spencer
40c5ebe4eb For: memory operations -> stores 
This is the first incremental patch to implement this feature. It adds no
functionality to LLVM but setup up the information needed from targets in
order to implement the optimization correctly. Each target needs to specify
the maximum number of store operations for conversion of the llvm.memset,
llvm.memcpy, and llvm.memmove intrinsics into a sequence of store operations.
The limit needs to be chosen at the threshold of performance for such an
optimization (generally smallish). The target also needs to specify whether
the target can support unaligned stores for multi-byte store operations.
This helps ensure the optimization doesn't generate code that will trap on
an alignment errors.
More patches to follow.

llvm-svn: 22468
 2005-07-19 04:52:44 +00:00
Nate Begeman
160c12d896 Teach the legalizer how to promote SINT_TO_FP to a wider SINT_TO_FP that 
the target natively supports.  This eliminates some special-case code from
the x86 backend and generates better code as well.

For an i8 to f64 conversion, before & after:

_x87 before:
        subl $2, %esp
        movb 6(%esp), %al
        movsbw %al, %ax
        movw %ax, (%esp)
        filds (%esp)
        addl $2, %esp
        ret

_x87 after:
        subl $2, %esp
        movsbw 6(%esp), %ax
        movw %ax, (%esp)
        filds (%esp)
        addl $2, %esp
        ret

_sse before:
        subl $12, %esp
        movb 16(%esp), %al
        movsbl %al, %eax
        cvtsi2sd %eax, %xmm0
        addl $12, %esp
        ret

_sse after:
        subl $12, %esp
        movsbl 16(%esp), %eax
        cvtsi2sd %eax, %xmm0
        addl $12, %esp
        ret

llvm-svn: 22452
 2005-07-16 02:02:34 +00:00
Nate Begeman
7a1bc7318d Teach the register allocator that movaps is also a move instruction 
llvm-svn: 22451
 2005-07-16 02:00:20 +00:00
Nate Begeman
c93c1c5148 A couple more darwinisms 
llvm-svn: 22450
 2005-07-16 01:59:47 +00:00
Chris Lattner
79573b1a93 Remove all knowledge of UINT_TO_FP from the X86 backend, relying on the 
legalizer to eliminate them.  With this comes the expected code quality
improvements, such as, for this:

double foo(unsigned short X) { return X; }

we now generate this:

_foo:
        subl $4, %esp
        movzwl 8(%esp), %eax
        movl %eax, (%esp)
        fildl (%esp)
        addl $4, %esp
        ret

instead of this:

_foo:
        subl $4, %esp
        movw 8(%esp), %ax
        movzwl %ax, %eax   ;; Load not folded into this.
        movl %eax, (%esp)
        fildl (%esp)
        addl $4, %esp
        ret

-Chris

llvm-svn: 22449
 2005-07-16 00:28:20 +00:00
Nate Begeman
957e0e7c9e Get closer to fully working scalar FP in SSE regs. This gets singlesource 
working, and Olden/power.

llvm-svn: 22441
 2005-07-15 00:38:55 +00:00
Nate Begeman
8c2dadc92e Add support for printing the sse scalar comparison instruction mnemonics. 
llvm-svn: 22440
 2005-07-14 22:52:25 +00:00
John Criswell
64f658a2f7 Fixed PR#596: 
Add parenthesis around the value being negated; that way, if the value
begins with a minus sign (e.g. negative integer), we won't generate a
C predecrement operator by mistake.

llvm-svn: 22437
 2005-07-14 19:41:16 +00:00
Nate Begeman
7330d9cd80 Check in the last of the darwin-specific code necessary to get shootout 
working before modifying the asm printer to use the subtarget info.

llvm-svn: 22408
 2005-07-12 18:34:58 +00:00
Nate Begeman
be4b78ff53 Remove some code that moved to the generic asm printer a long time ago. 
llvm-svn: 22407
 2005-07-12 18:34:15 +00:00