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9285 Commits

Author SHA1 Message Date
Chris Lattner
7cd50cf286 More bugfixes for IA64 shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19739 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:33:03 +00:00
Chris Lattner
27ff112948 Fix problems with non-x86 targets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19738 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:31:52 +00:00
Chris Lattner
a7306db5f7 Add a nasty hack to fix Alpha/IA64 multiplies by a power of two. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19737 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:20:42 +00:00
Chris Lattner
9bb86f46e1 Remove unneeded line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19736 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:43:12 +00:00
Chris Lattner
1e7ceaf0a0 test commit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19735 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:38:56 +00:00
Chris Lattner
45f57b8ee3 Handle comparisons of gep instructions that have different typed indices 
as long as they are the same size.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19734 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:06:49 +00:00
Chris Lattner
fb0f53f9c1 Speed up folding operations into loads. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19733 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 21:43:02 +00:00
Chris Lattner
67b1c3c404 The ever-important vanity pass name :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19731 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 21:35:14 +00:00
Chris Lattner
4e7dd8f7c4 If the interpreter tries to execute an external function, kill it. Of course 
since we are dirty, special case __main.  This should fix the infinite loop
horrible stuff that happens on linux-alpha when configuring llvm-gcc.  It
might also help cygwin, who knows??


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19729 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 19:59:37 +00:00
Chris Lattner
b62e1e296e Fix a FIXME: realize that argument stores are all independent (don't alias) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19728 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 19:46:38 +00:00
Chris Lattner
a93ec3ebfb Unary token factor nodes are unneeded. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19727 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 18:01:22 +00:00
Chris Lattner
77e77a6aa0 Refactor libcall code a bit. Initial implementation of expanding int -> FP 
operations for 64-bit integers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19724 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 06:05:23 +00:00
Chris Lattner
e5544f851a Simplify the shift-expansion code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19721 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 20:29:23 +00:00
Chris Lattner
19ad0620bc Implement ADD_PARTS/SUB_PARTS so that 64-bit integer add/sub work. This 
fixes most of the remaining llc-beta failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19716 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:53:00 +00:00
Chris Lattner
84f6788044 Expand add/sub into ADD_PARTS/SUB_PARTS instead of a non-existant libcall. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19715 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:52:28 +00:00
Chris Lattner
17eee18f40 implement add_parts/sub_parts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19714 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:50:55 +00:00
Chris Lattner
353c3e4981 Add missing entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19712 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 17:32:28 +00:00
Chris Lattner
bf52d49f36 Fix a crash compiling 134.perl. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19711 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 16:50:16 +00:00
Chris Lattner
2c49f27955 Support targets that do not use i8 shift amounts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19707 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 22:31:21 +00:00
Chris Lattner
6fb5a4a5f8 Add two optimizations. The first folds (X+Y)-X -> Y 
The second folds operations into selects, e.g. (select C, (X+Y), (Y+Z))
-> (Y+(select C, X, Z)

This occurs a few times across spec, e.g.

         select    add/sub
mesa:    83        0
povray:  5         2
gcc      4         2
parser   0         22
perlbmk  13        30
twolf    0         3


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19706 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 21:50:18 +00:00
Chris Lattner
3ca6a2c72c Add an assertion that would have made more sense to duraid 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19704 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 21:32:07 +00:00
Chris Lattner
3d9dffc586 Add support for targets that pass args in registers to calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19703 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 20:24:35 +00:00
Chris Lattner
1e81b9e511 Fold single use token factor nodes into other token factor nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19701 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 19:10:54 +00:00
Chris Lattner
ec39a45bdb Realize the individual pieces of an expanded copytoreg/store/load are 
independent of each other.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19700 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 18:02:17 +00:00
Chris Lattner
39908e0ce0 Know some identities about tokenfactor nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19699 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 18:01:40 +00:00
Chris Lattner
88218ef706 Know some simple identities. This improves codegen for (1LL << N). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19698 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:29:49 +00:00
Chris Lattner
c3c021bcad Fix a problem where were were literally selecting for INCREASED register 
pressure, not decreases register pressure.  Fix problem where we accidentally
swapped the operands of SHLD, which caused fourinarow to fail.  This fixes
fourinarow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19697 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:24:34 +00:00
Chris Lattner
2a6e163edc Just in case, handle something that is both a use and a def. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19696 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:11:51 +00:00
Chris Lattner
d45be36965 When an instruction moves, make sure to update the VarInfo::Kills list as 
well as all of teh other stuff in livevar. This fixes the compiler crash
on fourinarow last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19695 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:09:15 +00:00
Chris Lattner
a76f04828a When commuting these instructions, make sure to actually swap the operands too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19694 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 16:55:52 +00:00
Chris Lattner
7d719c3cd8 Fix 'raise' to work with packed types. Patch by Morten Ofstad. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19693 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 16:16:35 +00:00
Chris Lattner
4053b1e30b Implement Regression/CodeGen/X86/rotate.ll: emit rotate instructions (which 
typically cost 1 cycle) instead of shld/shrd instruction (which are typically
6 or more cycles).  This also saves code space.

For example, instead of emitting:

rotr:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %CL, BYTE PTR [%ESP + 8]
        shrd %EAX, %EAX, %CL
        ret
rotli:
        mov %EAX, DWORD PTR [%ESP + 4]
        shrd %EAX, %EAX, 27
        ret

Emit:

rotr32:
        mov %CL, BYTE PTR [%ESP + 8]
        mov %EAX, DWORD PTR [%ESP + 4]
        ror %EAX, %CL
        ret
rotli32:
        mov %EAX, DWORD PTR [%ESP + 4]
        ror %EAX, 27
        ret

We also emit byte rotate instructions which do not have a sh[lr]d counterpart
at all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19692 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 08:07:05 +00:00
Chris Lattner
40ff633b05 Add rotate instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19690 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:50:03 +00:00
Chris Lattner
30ea1e9411 Match 16-bit shld/shrd instructions as well, implementing shift-double.llx:test5 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19689 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:37:26 +00:00
Chris Lattner
0df53d22c3 Improve coverage of the X86 instruction set by adding 16-bit shift doubles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19687 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:31:24 +00:00
Chris Lattner
41e431ba04 Teach the code generator that shrd/shld is commutable if it has an immediate. 
This allows us to generate this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        shld %EDX, %EDX, 2
        shl %EAX, 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %EDX, %EAX
        shrd %EDX, %ECX, 30
        shl %EAX, 2
        ret

Note the magically transmogrifying immediate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19686 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:11:01 +00:00
Chris Lattner
c71d6949b9 Use the TargetInstrInfo::commuteInstruction method to commute instructions 
instead of doing it manually.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19685 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:08:42 +00:00
Chris Lattner
167b10cba4 Finegrainify namespacification 
Add default impl of commuteInstruction
Add notes about ugly V9 code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19684 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 06:53:34 +00:00
Chris Lattner
8571637ee9 Codegen long >> 2 to this: 
foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        shrd %EAX, %EDX, 2
        sar %EDX, 2
        ret

instead of this:

test1:
        mov %ECX, DWORD PTR [%ESP + 4]
        shr %ECX, 2
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %EAX, %EDX
        shl %EAX, 30
        or %EAX, %ECX
        sar %EDX, 2
        ret

and long << 2 to this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
***     mov %EDX, %EAX
        shrd %EDX, %ECX, 30
        shl %EAX, 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        shr %ECX, 30
        mov %EDX, DWORD PTR [%ESP + 8]
        shl %EDX, 2
        or %EDX, %ECX
        shl %EAX, 2
        ret

The extra copy (marked ***) can be eliminated when I teach the code generator
that shrd32rri8 is really commutative.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19681 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 06:18:43 +00:00
Chris Lattner
e34b396ab7 Implement a way of expanding shifts. This applies to targets that offer 
select operations or to shifts that are by a constant.  This automatically
implements (with no special code) all of the special cases for shift by 32,
shift by < 32 and shift by > 32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19679 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 04:19:40 +00:00
Chris Lattner
009b55b6f6 X86 shifts mask the amount. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19678 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 03:36:30 +00:00
Chris Lattner
d6e496732b Add a hook to find out how the target handles shift amounts that are out of 
range.  Either they are undefined (the default), they mask the shift amount
to the size of the register (X86, Alpha, etc), or they extend the shift (PPC).

This defaults to undefined, which is conservatively correct.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19677 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 03:36:14 +00:00
Chris Lattner
d5d5682512 Zero is cheaper than sign extend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19675 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 21:57:59 +00:00
Chris Lattner
477c931852 Code to handle FP_EXTEND is dead now. X86 doesn't support any data types to 
FP_EXTEND from!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19674 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 20:05:56 +00:00
Chris Lattner
3dd68151dc Remove more dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19673 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:50:08 +00:00
Chris Lattner
a7a4c0f7c4 The selection dag code handles the promotions from F32 to F64 for us, so we 
don't need to even think about F32 in the X86 code anymore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19672 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:46:54 +00:00
Chris Lattner
47e9223e06 Fix some fixmes (promoting bools for select and brcond), fix promotion 
of zero and sign extends.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19671 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:27:06 +00:00
Chris Lattner
4a9b4f1943 Keep track of the retval type as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19670 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:26:36 +00:00
Chris Lattner
ef5cd1d3cf Teach legalize to promote copy(from|to)reg, instead of making the isel pass 
do it.  This results in better code on X86 for floats (because if strict
precision is not required, we can elide some more expensive double -> float
conversions like the old isel did), and allows other targets to emit
CopyFromRegs that are not legal for arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19668 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 17:54:55 +00:00
Chris Lattner
b422aeac9e Fix 124.m88ksim. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19667 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 17:35:28 +00:00
Chris Lattner
811482a82b Do not emit loads multiple times, potentially in the wrong places. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19661 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 04:18:32 +00:00
Tanya Lattner
0111474bde Minor changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19660 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 04:15:41 +00:00
Chris Lattner
b71f8fc99d Eliminate bad assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19659 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 04:00:54 +00:00
Chris Lattner
4a108668df * Eliminate the TokenSet and just use the ExprMap for both tokens and values. 
* Insert some really pedantic assertions that will notice when we emit the
  same loads more than one time, exposing bugs.  This turns a miscompilation in
  bzip2 into a compile-fail.  yaay.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19658 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 03:51:59 +00:00
Chris Lattner
82fbfb6984 Teach legalize to promote SetCC results. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19657 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:59:52 +00:00
Chris Lattner
f30b73b1c6 Allow setcc operations to have nonbool types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19656 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:52:03 +00:00
Chris Lattner
883c86f510 Rely on the code in MatchAddress to do this work. Otherwise we fail to 
match (X+Y)+(Z << 1), because we match the X+Y first, consuming the index
register, then there is no place to put the Z.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19652 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:25:52 +00:00
Chris Lattner
6e4e7652d8 Fix the completely broken FP constant folds for setcc's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19651 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:11:55 +00:00
Chris Lattner
98a8ba0393 Fix a problem where probing for addressing modes caused expressions to be 
emitted too early.  In particular, this fixes
Regression/CodeGen/X86/regpressure.ll:regpressure3.

This also improves the 2nd basic block in 164.gzip:flush_block, which went from

.LBBflush_block_1:      # loopentry.1.i
        movzx %EAX, WORD PTR [dyn_ltree + 20]
        movzx %ECX, WORD PTR [dyn_ltree + 16]
        mov DWORD PTR [%ESP + 32], %ECX
        movzx %ECX, WORD PTR [dyn_ltree + 12]
        movzx %EDX, WORD PTR [dyn_ltree + 8]
        movzx %EBX, WORD PTR [dyn_ltree + 4]
        mov DWORD PTR [%ESP + 36], %EBX
        movzx %EBX, WORD PTR [dyn_ltree]
        add DWORD PTR [%ESP + 36], %EBX
        add %EDX, DWORD PTR [%ESP + 36]
        add %ECX, %EDX
        add DWORD PTR [%ESP + 32], %ECX
        add %EAX, DWORD PTR [%ESP + 32]
        movzx %ECX, WORD PTR [dyn_ltree + 24]
        add %EAX, %ECX
        mov %ECX, 0
        mov %EDX, %ECX

to

.LBBflush_block_1:      # loopentry.1.i
        movzx %EAX, WORD PTR [dyn_ltree]
        movzx %ECX, WORD PTR [dyn_ltree + 4]
        add %ECX, %EAX
        movzx %EAX, WORD PTR [dyn_ltree + 8]
        add %EAX, %ECX
        movzx %ECX, WORD PTR [dyn_ltree + 12]
        add %ECX, %EAX
        movzx %EAX, WORD PTR [dyn_ltree + 16]
        add %EAX, %ECX
        movzx %ECX, WORD PTR [dyn_ltree + 20]
        add %ECX, %EAX
        movzx %EAX, WORD PTR [dyn_ltree + 24]
        add %ECX, %EAX
        mov %EAX, 0
        mov %EDX, %EAX

... which results in less spilling in the function.

This change alone speeds up 164.gzip from 37.23s to 36.24s on apoc.  The
default isel takes 37.31s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19650 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 01:06:26 +00:00
Chris Lattner
e9fe2bcac2 Fix indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19649 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 23:25:45 +00:00
Chris Lattner
869e0434ae Don't bother using max here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19647 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 23:02:13 +00:00
Chris Lattner
90d1be7eef Do not give token factor nodes outrageous weights 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19645 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 22:56:09 +00:00
Chris Lattner
d3948116b8 Non-volatile loads can be freely reordered against each other. This fixes 
X86/reg-pressure.ll again, and allows us to do nice things in other cases.
For example, we now codegen this sort of thing:

int %loadload(int *%X, int* %Y) {
  %Z = load int* %Y
  %Y = load int* %X      ;; load between %Z and store
  %Q = add int %Z, 1
  store int %Q, int* %Y
  ret int %Y
}

Into this:

loadload:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%EAX]
        mov %ECX, DWORD PTR [%ESP + 8]
        inc DWORD PTR [%ECX]
        ret

where we weren't able to form the 'inc [mem]' before.  This also lets the
instruction selector emit loads in any order it wants to, which can be good
for register pressure as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19644 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 22:19:26 +00:00
Chris Lattner
5c65981a57 Two changes: 
1. Fold  [mem] += (1|-1) into inc [mem]/dec [mem] to save some icache space.
 2. Do not let token factor nodes prevent forming '[mem] op= val' folds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19643 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 22:10:42 +00:00
Chris Lattner
a651cf67b7 Don't call SelectionDAG.getRoot() directly, go through a forwarding method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19642 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 19:43:36 +00:00
Chris Lattner
e10269ba30 Refactor load/op/store folding into it's own method, no functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19641 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 19:25:26 +00:00
Chris Lattner
0afa8e348e Implement a target independent optimization to codegen arguments only into 
the basic block that uses them if possible.  This is a big win on X86, as it
lets us fold the argument loads into instructions and reduce register pressure
(by not loading all of the arguments in the entry block).

For this (contrived to show the optimization) testcase:

int %argtest(int %A, int %B) {
        %X = sub int 12345, %A
        br label %L
L:
        %Y = add int %X, %B
        ret int %Y
}

we used to produce:

argtest:
        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EAX, 12345
        sub %EAX, %ECX
        mov %EDX, DWORD PTR [%ESP + 8]
.LBBargtest_1:  # L
        add %EAX, %EDX
        ret


now we produce:

argtest:
        mov %EAX, 12345
        sub %EAX, DWORD PTR [%ESP + 4]
.LBBargtest_1:  # L
        add %EAX, DWORD PTR [%ESP + 8]
        ret

This also fixes the FIXME in the code.

BTW, this occurs in real code.  164.gzip shrinks from 8623 to 8608 lines of
.s file.  The stack frame in huft_build shrinks from 1644->1628 bytes,
inflate_codes shrinks from 116->108 bytes, and inflate_block from 2620->2612,
due to fewer spills.

Take that alkis. :-)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19639 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:55:19 +00:00
Chris Lattner
ae3ffba466 Fix a major regression last night that prevented us from producing [mem] op= reg 
operations.

The body of the if is less indented but unmodified in this patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19638 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:49:14 +00:00
Chris Lattner
068a81e9fc Refactor code into a new method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19635 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:15:02 +00:00
Chris Lattner
2a4e508281 Codegen this: 
int %foo(int %X) {
        %T = add int %X, 13
        %S = mul int %T, 3
        ret int %S
}

as this:

        mov %ECX, DWORD PTR [%ESP + 4]
        lea %EAX, DWORD PTR [%ECX + 2*%ECX + 39]
        ret

instead of this:

        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EAX, %ECX
        add %EAX, 13
        imul %EAX, %EAX, 3
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19633 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 06:48:02 +00:00
Tanya Lattner
7a866d9a43 Added tmp instructions to preserve ssa. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19632 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 06:47:26 +00:00
Chris Lattner
4ff348befa Fix test/Regression/CodeGen/X86/2005-01-17-CycleInDAG.ll and 132.ijpeg. 
Do not fold a load into an operation if it will induce a cycle in the DAG.

Repeat after me: dAg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19631 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 06:26:58 +00:00
Chris Lattner
a3fd1c569c Delete PHI nodes that are not dead but are locked in a cycle of single 
useness.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19629 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 05:10:15 +00:00
Chris Lattner
b352fa5853 Move code out of indentation one level to make it easier to read. 
Disable the xform for < > cases.  It turns out that the following is being
miscompiled:

bool %test(sbyte %S) {
        %T = cast sbyte %S to uint
        %V = setgt uint %T, 255
        ret bool %V
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19628 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 03:20:02 +00:00
Chris Lattner
cb1aa8d772 Do not fold a load into a comparison that is used by more than one place. 
The comparison will probably be folded, so this is not ok to do.
This fixed 197.parser.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19624 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 01:34:14 +00:00
Chris Lattner
c98279d371 Do not codegen 'xor bool, true' as 'not reg'. not reg inverts the upper bits 
of the bytereg.  This fixes yacr2, 300.twolf and probably others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19622 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 00:23:16 +00:00
Chris Lattner
4df0de975a Set up the shift and setcc types. 
If we emit a load because we followed a token chain to get to it, try to
fold it into its single user if possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19620 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 00:00:33 +00:00
Chris Lattner
714b69d047 Shift and setcc types default to the pointer type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19619 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 23:59:48 +00:00
Chris Lattner
8ac532c55e Implement legalize of call nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19617 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 19:46:48 +00:00
Tanya Lattner
7600587e66 Added paramters to a few functions in order to allow me to change the functions to preserve SSA 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19615 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 08:51:10 +00:00
Chris Lattner
da2ce11407 * Adjust to changes in TargetLowering interfaces. 
* Remove custom promotion for bool and byte select ops.  Legalize now
  promotes them for us.
* Allow folding ConstantPoolIndexes into EXTLOAD's, useful for float immediates.
* Declare which operations are not supported better.
* Add some hacky code for TRUNCSTORE to pretend that we have truncstore
  for i16 types.  This is useful for testing promotion code because I can
  just remove 16-bit registers all together and verify that programs work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19614 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:34:08 +00:00
Chris Lattner
55ba8fba75 Revamp supported ops. Instead of just being supported or not, we now keep 
track of how to deal with it, and provide the target with a hook that they
can use to legalize arbitrary operations in arbitrary ways.

Implement custom lowering for a couple of ops, implement promotion for select
operations (which x86 needs).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19613 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:29:19 +00:00
Chris Lattner
171453a284 add method stub 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19612 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:28:41 +00:00
Chris Lattner
4b7899343e Don't mash stuff together. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19611 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:28:31 +00:00
Chris Lattner
cba82f9339 Use enums, move virtual dtor out of line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19610 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:28:11 +00:00
Chris Lattner
f8161d83f0 Implement some more missing promotions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19606 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 05:06:12 +00:00
Chris Lattner
8102fcde4c Fix bugpoint 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19605 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 04:23:22 +00:00
Chris Lattner
ccad8439e0 cycles_t -> CycleCount_t 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19604 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 04:20:30 +00:00
Chris Lattner
9467497ae2 Clarify assertion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19597 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:34 +00:00
Chris Lattner
7636512f59 Add assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19596 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:22 +00:00
Chris Lattner
c8ea3c4710 Add support for promoted registers being live across blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19595 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:07 +00:00
Reid Spencer
bdf6a39d1c Rename BUILD_* to PROJ_* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19592 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:21:29 +00:00
Tanya Lattner
5fd2ef1e43 Fixed a couple of instructions that broke SSA. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19587 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:14:17 +00:00
Chris Lattner
638559aaa3 Improve compatiblity with HPUX on Itanium, patch by Duraid Madina 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19586 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:31:31 +00:00
Chris Lattner
cfdfe4ce4a Set up identity transforms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19584 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:20:18 +00:00
Chris Lattner
71c42a0190 Move some information into the TargetLowering object. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19583 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:11:45 +00:00
Chris Lattner
98e5c0e5e4 Use the new TLI method to get this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19582 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:11:19 +00:00
Chris Lattner
bb97d81cc8 Move some information out of LegalizeDAG into the generic Target interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19581 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:10:58 +00:00
Chris Lattner
1713e73b8a legalize a bunch of operations that I missed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19580 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:38:00 +00:00
Chris Lattner
fb849800ea Add support for targets that require promotions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19579 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:37:38 +00:00
Chris Lattner
ff3e50cc39 Fix some serious bugs in promotion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19578 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:17:42 +00:00
Chris Lattner
950aa3ca2c Eliminate unneeded extensions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19577 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:17:20 +00:00
Chris Lattner
8b6fa22e72 Implement promotion of a whole bunch more operators. I think that this is 
basically everything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19576 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 22:16:26 +00:00
Chris Lattner
8a389bb376 Print extra type for nodes with extra type info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19575 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 21:11:37 +00:00
Chris Lattner
45b8caf1c5 Add support for legalizing FP_ROUND_INREG, SIGN_EXTEND_INREG, and 
ZERO_EXTEND_INREG for targets that don't support them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19573 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 07:15:18 +00:00
Chris Lattner
4ea6924444 Common code factored out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19572 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 07:14:32 +00:00
Chris Lattner
57bf3287dd implement these methods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19571 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:52:40 +00:00
Chris Lattner
0f69b29108 Add support for promoting ADD/MUL. 
Add support for new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators.
Realize that if we do any promotions, we need to iterate SelectionDAG
construction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19569 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:18:18 +00:00
Chris Lattner
859157daee Add new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19568 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:17:04 +00:00
Chris Lattner
45554a61f2 Add a new target-independent code generator flag. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19567 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:00:32 +00:00
Chris Lattner
e9ef81dd2f Add support for truncstore and *extload. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19566 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 05:22:24 +00:00
Chris Lattner
03c8546ec5 Add intitial support for promoting some operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19565 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 05:21:40 +00:00
Reid Spencer
e1c6bfa385 We don't distribute the operating system specific directories any more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19563 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:43:01 +00:00
Chris Lattner
69a52155d2 Adjust to CopyFromReg changes, implement deletion of truncating/extending 
stores/loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19562 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:38:01 +00:00
Chris Lattner
7f2afac1dc Adjust to CopyFromREg changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19561 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:37:41 +00:00
Chris Lattner
2ee743ff9b Start implementing truncating stores and extending loads. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:08:15 +00:00
Chris Lattner
3c70764907 Fix Regression/CodeGen/PowerPC/2005-01-14-UndefLong.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19557 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 20:22:02 +00:00
Chris Lattner
fbd4de1d9b Fix: Regression/CodeGen/PowerPC/2005-01-14-SetSelectCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19555 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 19:31:00 +00:00
Chris Lattner
906ab50acf Fix some bugs in an xform added yesterday. This fixes Prolangs-C/allroots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19553 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 17:35:12 +00:00
Chris Lattner
6f7f02fdec Fix a compile crash on spiff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19552 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 17:17:59 +00:00
Chris Lattner
8f1d6402ba Improve compatibility with acc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19549 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 15:54:24 +00:00
Chris Lattner
9a791eaf8f Make this compatible with the HP/intel compiler. Fix by Duraid, thanks! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19548 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 15:53:26 +00:00
Jeff Cohen
3bbbcc113b Fix and improve win32 path validation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19545 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 04:09:39 +00:00
Reid Spencer
62582720e6 Make asctime_r work for HP/UX. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19544 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 00:50:50 +00:00
Chris Lattner
4401c9cabe if two gep comparisons only differ by one index, compare that index directly. 
This allows us to better optimize begin() -> end() comparisons in common cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19542 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 00:20:05 +00:00
Chris Lattner
0b84c80c08 Do not overrun iterators. This fixes a 176.gcc crash 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19541 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 23:26:48 +00:00
Chris Lattner
87875dac89 Turn select C, (X+Y), (X-Y) --> (X+(select C, Y, (-Y))). This occurs in 
the 'sim' program and probably elsewhere.  In sim, it comes up for cases
like this:

#define round(x) ((x)>0.0 ? (x)+0.5 : (x)-0.5)
double G;
void T(double X) { G = round(X); }

(it uses the round macro a lot).  This changes the LLVM code from:

        %tmp.1 = setgt double %X, 0.000000e+00          ; <bool> [#uses=1]
        %tmp.4 = add double %X, 5.000000e-01            ; <double> [#uses=1]
        %tmp.6 = sub double %X, 5.000000e-01            ; <double> [#uses=1]
        %mem_tmp.0 = select bool %tmp.1, double %tmp.4, double %tmp.6
        store double %mem_tmp.0, double* %G

to:

        %tmp.1 = setgt double %X, 0.000000e+00          ; <bool> [#uses=1]
        %mem_tmp.0.p = select bool %tmp.1, double 5.000000e-01, double -5.000000e-01
        %mem_tmp.0 = add double %mem_tmp.0.p, %X
        store double %mem_tmp.0, double* %G
        ret void


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19537 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 22:52:24 +00:00
Chris Lattner
e9d782b7be Implement an optimization for == and != comparisons like this: 
_Bool test2(int X, int Y) {
  return &arr[X][Y] == arr;
}

instead of generating this:

bool %test2(int %X, int %Y) {
        %tmp.3.idx = mul int %X, 160            ; <int> [#uses=1]
        %tmp.3.idx1 = shl int %Y, ubyte 2               ; <int> [#uses=1]
        %tmp.3.offs2 = sub int 0, %tmp.3.idx            ; <int> [#uses=1]
        %tmp.7 = seteq int %tmp.3.idx1, %tmp.3.offs2            ; <bool> [#uses=1]
        ret bool %tmp.7
}


generate this:

bool %test2(int %X, int %Y) {
        seteq int %X, 0         ; <bool>:0 [#uses=1]
        seteq int %Y, 0         ; <bool>:1 [#uses=1]
        %tmp.7 = and bool %0, %1                ; <bool> [#uses=1]
        ret bool %tmp.7
}

This idiom occurs in C++ programs when iterating from begin() to end(),
in a vector or array.  For example, we now compile this:

void test(int X, int Y) {
  for (int *i = arr; i != arr+100; ++i)
    foo(*i);
}

to this:

no_exit:                ; preds = %entry, %no_exit
	...
        %exitcond = seteq uint %indvar.next, 100                ; <bool> [#uses=1]
        br bool %exitcond, label %return, label %no_exit



instead of this:

no_exit:                ; preds = %entry, %no_exit
	...
        %inc5 = getelementptr [100 x [40 x int]]* %arr, int 0, int 0, int %inc.rec              ; <int*> [#uses=1]
        %tmp.8 = seteq int* %inc5, getelementptr ([100 x [40 x int]]* %arr, int 0, int 100, int 0)              ; <bool> [#uses=1]
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=1]
        br bool %tmp.8, label %return, label %no_exit


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19536 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 22:25:21 +00:00
Chris Lattner
18c2f13e0f Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19535 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 20:50:02 +00:00
Chris Lattner
5bdf04cc8e Fix some bugs in code I didn't mean to check in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19534 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 20:40:58 +00:00
Chris Lattner
574da9ba0b Fix a crash compiling 129.compress 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19533 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 20:14:25 +00:00
Chris Lattner
1d50b7fa53 Codegen factor nodes more intelligently according to perceived register pressure. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19532 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 19:56:00 +00:00
Chris Lattner
5a6c6d98d5 Don't forget the existing root. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19531 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 19:53:14 +00:00
Chris Lattner
c35807155c Initial trivial (but stupid) codegen for this node. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19529 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 18:01:36 +00:00
Chris Lattner
ddb870b065 Codegen independent ops as being independent. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19528 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:43 +00:00
Chris Lattner
a385e9b20f Legalize new node, add assertion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19527 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:25 +00:00
Chris Lattner
282c5cae89 Print new node. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19526 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:10 +00:00
Chris Lattner
636e79a20f Add some really pedantic assertions to the load folding code. Fix a bunch 
of cases where we accidentally emitted a load folded once and unfolded
elsewhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19522 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 05:53:16 +00:00
Chris Lattner
2f0ca79a75 Do not fold (zero_ext (sign_ext V)) -> (sign_ext V), they are not the same. 
This fixes llvm-test/SingleSource/Regression/C/casts.c


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19519 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:51:15 +00:00
Chris Lattner
a0bb692b27 We can only fold a load into an op if there is exactly one use of the value. 
Checking to see if the load has two uses is not equivalent, as the chain
value may have zero uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19518 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:38:26 +00:00
Chris Lattner
5c88456227 New method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19517 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:37:47 +00:00
Chris Lattner
2dad454af6 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19515 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:19:52 +00:00
Chris Lattner
9bbd992eb1 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19513 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:08:53 +00:00
Reid Spencer
3bfbf4ea99 Shut up warnings with GCC 3.4.3 about uninitialized variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19512 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 14:53:45 +00:00
Chris Lattner
2b9378646d Fix a major miscompilation where we were overwriting the scale reg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19511 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 07:33:20 +00:00
Chris Lattner
48034fd9f1 Do not use the type of the RHS constant to determine the type of the operation. 
This fails for shifts because the constant is always 8 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19508 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 05:22:07 +00:00
Chris Lattner
a23ccfb124 Do not lose the offset from teh global when peephole optimizing instructions. 
This fixes FreeBench/pcompress


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19507 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 05:17:28 +00:00
Chris Lattner
507bdf9488 Silence VC++ warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19506 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:51:37 +00:00
Jeff Cohen
603fea9eb6 Fix C++ more compilatiom errors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19504 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:29:05 +00:00
Chris Lattner
a56cea4495 Fix a compile error with VC++, which things that static const arrays need 
to be dynamically initialized. :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19503 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:23:22 +00:00
Chris Lattner
7dbcb75b15 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19502 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:21:28 +00:00
Chris Lattner
e11a9a93a8 Print a load of a null pointer (in intel mode) like this: 
mov %AX, WORD PTR [0]

instead of like this:

        mov %AX, WORD PTR []


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19501 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:07:11 +00:00
Chris Lattner
9f2cb3da48 Print a load of a null pointer like this: 
movw 0, %ax

instead of like this:

        movw , %ax


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19500 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:05:19 +00:00
Chris Lattner
085c9955ca Fix a crash compiling povray on UINT_TO_FP from i16. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19499 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 04:00:00 +00:00
Chris Lattner
7944d9d995 Add an option to view the selection dags as they are generated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19498 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 03:41:21 +00:00
Chris Lattner
4292830fe5 There are no [mem] op= reg instructions for FP, so remove their entries. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19496 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 03:16:09 +00:00
Chris Lattner
db8c368d7b Fix a bug where we didn't insert FP_REG_KILL instructions into MBB's that 
contain FP PHI nodes but no other FP defining instructions.  This fixes
183.equake


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19495 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 02:57:10 +00:00
Chris Lattner
afce4306ec Fold TRUNCATE (LOAD P) into a smaller load from P. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19494 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 02:19:06 +00:00
Chris Lattner
ef6806c979 Be more careful about order of arg evalution for CopyToReg nodes. This shrinks 
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. :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19493 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 02:02:48 +00:00
Chris Lattner
7ea64f5d12 Fold some more [mem] op= val operators. This allows us to things like this 
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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19492 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 01:28:00 +00:00
Chris Lattner
dbba22fa2a Fold loads into sign/zero extends. instead of: 
mov %AL, BYTE PTR [%EDX + l18_length_code]
  movzx %EAX, %AL

Emit:

  movzx %EAX, BYTE PTR [%EDX + l18_length_code]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19489 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 23:33:00 +00:00
Chris Lattner
837caa7223 Comment out debug code :) 
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19488 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 23:21:30 +00:00
Chris Lattner
5f75d9a88c Handle the global address case here, not just the offset case. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19487 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 22:58:43 +00:00
Chris Lattner
c4b6a78980 Treat int constants as not requiring a register, since they are almost always 
folded into an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19486 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 22:29:12 +00:00
Chris Lattner
c871e1d56f Print the value types in the nodes of the graph 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19485 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 22:21:04 +00:00
Chris Lattner
f1fdacae8c add an assertion, avoid creating copyfromreg/copytoreg pairs that are the 
same for PHI nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19484 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 22:03:46 +00:00
Chris Lattner
a5ade060db * Factor a bunch of binary operator cases into shared code. 
* Fold loads into Add, sub, and, or, xor and mul when possible.
* Codegen shl X, 1 as add X, X


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19483 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 21:19:59 +00:00
Chris Lattner
7abf820182 Clear the whole array, always. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19482 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 20:25:26 +00:00
Chris Lattner
947d544e29 Fold multiplies by 3,5,9 into addressing modes when possible. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19480 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 19:37:02 +00:00
Chris Lattner
64da653ba9 Squelch optimized warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19475 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 17:46:49 +00:00
Chris Lattner
51a263434a Instead of generating stuff like this: 
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".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19472 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 06:36:20 +00:00
Chris Lattner
31805bf2b6 Implement MEMCPY natively in terms of rep movs* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19468 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 06:19:26 +00:00
Chris Lattner
989de030c4 Implement memset -> rep stos* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19467 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 06:14:36 +00:00
Chris Lattner
795069dd38 Announce that we don't support mem ops yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19466 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:57:36 +00:00
Chris Lattner
e1bd822ddb Teach legalize to lower MEMSET/MEMCPY/MEMMOVE operations if the target 
does not support them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19465 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:57:22 +00:00
Chris Lattner
4c633e82f6 Print new operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19464 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:57:01 +00:00
Chris Lattner
7041ee35ad Turn memset/memcpy/memmove into the corresponding operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19463 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:56:49 +00:00
Chris Lattner
a95589be3f Teach the address selector to make 'reg+reg' addressing modes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19457 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:40:19 +00:00
Reid Spencer
99f997d2c1 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19456 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:33:32 +00:00
Chris Lattner
d4dab929d8 Emit NOT instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19455 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:31:30 +00:00
Chris Lattner
a8d9cc8705 shift X, 0 -> X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19453 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:25:13 +00:00
Chris Lattner
6c07aee7c9 Fix a bug emitting branches that broke a lot of programs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19452 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:06:27 +00:00
Chris Lattner
ef7ba0756b Be more careful where we set ContainsFPCode. We were missing a set in the 
int -> FP casting code.  Note that we don't have to set it for FP operations
that take FP values as operands: whatever produces the FP value will set the
flag.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19451 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 03:50:45 +00:00
Chris Lattner
a3aa2e2882 Fix a major bug in setcc/cmov folding, where we accidentally 
inverted the sense of the comparison.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19450 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 03:37:59 +00:00
Chris Lattner
1133309e57 Take register pressure into account when we have to decide whether to 
evaluate the LHS or the RHS of an operation first.  This causes good things
to happen.  For example, instead of compiling a loop to this:

.LBBstrength_result7_1: # loopentry
        movl 16(%esp), %edi
        movl (%edi), %edi             ;;; LOAD
        movl (%ecx), %ebx
        movl $2, (%eax,%ebx,4)
        movl (%edx), %ebx
        movl %esi, %ebp
        addl $21, %ebp
        addl $42, %esi
        cmpl $0, %edi                 ;;; USE
        cmovne %esi, %ebp
        cmpl %ebp, %ebx
        movl %ebp, %esi
        jg .LBBstrength_result7_1

We now compile it to this:

.LBBstrength_result7_1: # loopentry
        movl %edi, %ebx
        addl $42, %ebx
        addl $21, %edi
        movl (%ecx), %ebp              ;; LOAD
        cmpl $0, %ebp                  ;; USE
        cmovne %ebx, %edi
        movl (%edx), %ebx
        movl $2, (%eax,%ebx,4)
        movl (%esi), %ebx
        cmpl %edi, %ebx
        jg .LBBstrength_result7_1

Which reduces register pressure enough (in this case) to avoid spilling in the
loop.

As another example, consider the CodeGen/X86/regpressure.ll testcase.  We
used to generate this code for both cases:

regpressure1:
        subl $32, %esp
        movl %esi, 12(%esp)
        movl %edi, 8(%esp)
        movl %ebx, 4(%esp)
        movl %ebp, (%esp)
        movl 36(%esp), %ecx
        movl (%ecx), %eax
        movl 4(%ecx), %edx
        movl %edx, 24(%esp)
        movl 8(%ecx), %edx
        movl %edx, 16(%esp)
        movl 12(%ecx), %edx
        movl 16(%ecx), %esi
        movl 20(%ecx), %edi
        movl 24(%ecx), %ebx
        movl %ebx, 28(%esp)
        movl 28(%ecx), %ebx
        movl 32(%ecx), %ebp
        movl %ebp, 20(%esp)
        movl 36(%ecx), %ecx
        imull 24(%esp), %eax
        imull 16(%esp), %eax
        imull %edx, %eax
        imull %esi, %eax
        imull %edi, %eax
        imull 28(%esp), %eax
        imull %ebx, %eax
        imull 20(%esp), %eax
        imull %ecx, %eax
        movl (%esp), %ebp
        movl 4(%esp), %ebx
        movl 8(%esp), %edi
        movl 12(%esp), %esi
        addl $32, %esp
        ret

This code is basically trying to do all of the loads first, then execute all
of the multiplies.  Because we run out of registers, lots of spill code happens.
We now generate this code for both cases:

regpressure1:
        movl 4(%esp), %ecx
        movl (%ecx), %eax
        movl 4(%ecx), %edx
        imull %edx, %eax
        movl 8(%ecx), %edx
        imull %edx, %eax
        movl 12(%ecx), %edx
        imull %edx, %eax
        movl 16(%ecx), %edx
        imull %edx, %eax
        movl 20(%ecx), %edx
        imull %edx, %eax
        movl 24(%ecx), %edx
        imull %edx, %eax
        movl 28(%ecx), %edx
        imull %edx, %eax
        movl 32(%ecx), %edx
        imull %edx, %eax
        movl 36(%ecx), %ecx
        imull %ecx, %eax
        ret

which is much nicer (when we fold loads into the muls it will be even better).
The old instruction selector used to produce the good code for regpressure1
but not for regpressure2, as it depended on the order of operations in the
LLVM code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19449 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 03:11:44 +00:00
Chris Lattner
e9c44cdf18 Print SelectionDAGs bottom up, include extra info in the node labels 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19447 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 00:34:33 +00:00
Chris Lattner
fc08d9c789 Add a marker for the graph root. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19445 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:52:04 +00:00
Chris Lattner
e0646b86e3 Put the operation name in each node, put the function name on the graph. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19444 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:26:00 +00:00
Chris Lattner
d75f19fa42 Split out SDNode::getOperationName into its own method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19443 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:25:25 +00:00
Chris Lattner
66328480bb Implement initial selectiondag printing support. This gets us a nice 
graph with no labels! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19441 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:08:40 +00:00
Chris Lattner
24aad1b0c1 Fold setcc instructions into selects. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19438 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 22:10:13 +00:00
Chris Lattner
57fbfb5879 Add conditional moves for the parity flag. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19437 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 22:09:33 +00:00
Chris Lattner
6b7598b995 Lower to the correct functions. This fixes FreeBench/fourinarow 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19436 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 21:02:37 +00:00
Chris Lattner
a13d3236d1 Implement 8-bit multiply for X86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19435 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 20:55:48 +00:00
Chris Lattner
281a601198 Rework constant pool handling so that function constant pools are no longer 
leaked to the system.  Now they are destroyed with the JITMemoryManager is
destroyed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19434 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 18:23:22 +00:00
Jeff Cohen
ecc1cef8bf Apply feedback from Chris. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19432 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 04:23:32 +00:00
Jeff Cohen
6e400f76e6 Apply feed back from Chris: 
1. Rename createLoaderPass to CreateProfileLoaderPass
  2. Opt shouldn't use the pass registered in CodeGen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19431 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 03:56:27 +00:00
Chris Lattner
68dc310942 Implement a couple of more simplifications. This lets us codegen: 
int test2(int * P, int* Q, int A, int B) {
        return P+A == P;
}

into:

test2:
        movl 4(%esp), %eax
        movl 12(%esp), %eax
        shll $2, %eax
        cmpl $0, %eax
        sete %al
        movzbl %al, %eax
        ret

instead of:

test2:
        movl 4(%esp), %eax
        movl 12(%esp), %ecx
        leal (%eax,%ecx,4), %ecx
        cmpl %eax, %ecx
        sete %al
        movzbl %al, %eax
        ret

ICC is producing worse code:

test2:
        movl      4(%esp), %eax                                 #8.5
        movl      12(%esp), %edx                                #8.5
        lea       (%edx,%edx), %ecx                             #9.9
        addl      %ecx, %ecx                                    #9.9
        addl      %eax, %ecx                                    #9.9
        cmpl      %eax, %ecx                                    #9.16
        movl      $0, %eax                                      #9.16
        sete      %al                                           #9.16
        ret                                                     #9.16

as is GCC (looks like our old code):

test2:
        movl    4(%esp), %edx
        movl    12(%esp), %eax
        leal    (%edx,%eax,4), %ecx
        cmpl    %edx, %ecx
        sete    %al
        movzbl  %al, %eax
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19430 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 02:03:02 +00:00
Chris Lattner
87ae6ae41c Fix incorrect constant folds, fixing Stepanov after the SHR patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19429 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 01:16:03 +00:00
Chris Lattner
8136d1f8cb Constant fold shifts, turning this loop: 
.LBB_Z5test0PdS__3:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        movl $16000, %ecx
        sarl $3, %ecx
        cmpl %eax, %ecx
        fstpl 16(%esp)
        #FP_REG_KILL
        jg .LBB_Z5test0PdS__3   # no_exit.1

into:

.LBB_Z5test0PdS__3:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        cmpl $2000, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__3   # no_exit.1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19427 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 00:07:15 +00:00