Commit Graph

13343 Commits

Author SHA1 Message Date
Reid Spencer
8f6c42ba84 Added another test case for double FP constants as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15233 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 15:04:13 +00:00
Chris Lattner
a000279a7d Implement DeadStoreElim/alloca.llx by observing that allocas are dead at the
end of the function (either return or unwind)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15232 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 06:14:11 +00:00
Chris Lattner
a00064a383 New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15231 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 06:11:42 +00:00
Chris Lattner
61d462760b Add some new methods
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15230 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 05:50:23 +00:00
Chris Lattner
558cb5f4a1 New methods
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15229 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 05:50:09 +00:00
Chris Lattner
8ea3f1b3bc Update test
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15228 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 05:04:25 +00:00
Chris Lattner
595ee7ec26 Throttle back indvar substitution from creating multiplies in loops. This is bad bad bad.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15227 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 02:47:12 +00:00
Chris Lattner
8d65a06a3e Fix bug in previous patch :(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15226 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 01:40:20 +00:00
Chris Lattner
badf091b47 Fix an extremely serious regression that was causing LLVM basic blocks to be
scrambled around almost at random, having really bad effects on icache locality.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15225 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 01:22:59 +00:00
Chris Lattner
1d78516c65 Fix a serious bug in the double constant reader. In particular, because
(At[3] << 24) is an int type and it is being coerced to uint64_t, it was
getting sign extended, causing us to get FFFFFFFFxxxxxxxx constants all of
the time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15224 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 23:15:44 +00:00
Chris Lattner
a9d790c831 Temporarily disable this code, as it is emitting LLVM_NAN("nan") which results in a call to the
glibc 'nan' function because the initializer is not a string.  This breaks when used in a global
initializer.  Try compiling this testcase for example:

%X = global float <some nan value>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15223 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 22:36:35 +00:00
Reid Spencer
f847432f77 Bugs fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15222 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 22:15:33 +00:00
Reid Spencer
cddc86f27c Avoid use of size(), which counts, in favor of other mechanisms.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15221 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:44:54 +00:00
Reid Spencer
ada1618afa Always write FP values correctly.
Adjust for new Module.h interface for dependent libraries.
Excise unused backwards compatibility flag.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15220 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:36:26 +00:00
Reid Spencer
7d146e1107 Don't create a backwards compatibility flag for something that was a
regression bug introduced in release 1.2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15219 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:32:51 +00:00
Reid Spencer
5ac8812c54 Adjust to new Module.h interface for dependent libraries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15218 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:32:02 +00:00
Reid Spencer
feaf10e571 Adjust to new Module.h interface for dependent libraries
Remove mem leaks resulting from not freeing parse strings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15217 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:30:51 +00:00
Reid Spencer
c9a1f0dcdd Adjust to new Module.h interface for dependent libraries
Only write the target triple and deplibs if they are non-empty.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15216 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:29:43 +00:00
Reid Spencer
641588bb3e Reduce the footprint of the dependent library interface
Document the dependent library interface
Constify the std::string& parameters in the dep lib interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15215 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 21:28:19 +00:00
Chris Lattner
34a1005737 Fix a latent bug in the AliasSetTracker that was exposed by the FreeInst additions and broke a bunch of programs last night.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15214 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 18:32:01 +00:00
Reid Spencer
c5b27621e0 bug 263:
Add target triple and dependent libraries support to this test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15213 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 18:09:47 +00:00
Reid Spencer
801db47373 bug 263:
Ensure the list of libraries is cleared.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15212 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 18:08:57 +00:00
Reid Spencer
83f6a77c8f bug 263:
Add ability to write target triple and dependent libraries information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15211 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 18:08:18 +00:00
Reid Spencer
ad89bd6a1a bug 263:
- encode/decode target triple and dependent libraries
bug 401:
- fix encoding/decoding of FP values to be little-endian only
bug 402:
- initial (compatible) cut at 24-bit types instead of 32-bit
- reduce size of block headers by 50%
Other:
- cleanup Writer by consolidating to one compilation unit, rem. other files
- use a std::vector instead of std::deque so the buffer can be allocated
  in multiples of 64KByte chunks rather than in multiples of some smaller
  (default) number.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15210 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 18:07:36 +00:00
Reid Spencer
0be13e7f14 bug 263:
Provide parsing for the target triple and dependent libraries.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15209 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 17:58:28 +00:00
Reid Spencer
3cd2fe3d2f bug 263:
Provide new tokens for target triples and dependent libraries.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15208 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 17:56:00 +00:00
Reid Spencer
af8ea13dd6 bug 263:
The necessary changes to module in order to support both target triples and
a list of dependent libraries.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15207 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 17:52:27 +00:00
Reid Spencer
7105f4ae8c bug 402:
A new set of block identifiers has been added for version 1.3 so that the
range of values can fit within 5 bits. This aids in halving the size of
block headers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15206 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 17:50:00 +00:00
Chris Lattner
002f29b0f0 Codify my thoughts on where we want to end up with the target-independent
code generator.  Comments welcome.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15205 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 12:13:35 +00:00
Chris Lattner
70e9b59b0e * Substantially simplify how free instructions are handled (potentially fixing
a bug in DSE).
* Delete dead operand uses iteratively instead of recursively, using a
  SetVector.
* Defer deletion of dead operand uses until the end of processing, which means
  we don't have to bother with updating the AliasSetTracker.  This speeds up
  DSE substantially.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15204 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 11:09:56 +00:00
Chris Lattner
f90fcaf572 Add back() and pop_back() methods to SetVector
Move clear to the end of the class
Add assertions


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15203 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 11:07:02 +00:00
Alkis Evlogimenos
5a0a1c2cba Add some comments to the backtracking code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15200 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 08:10:33 +00:00
Chris Lattner
a9e2f3d0ab Free instructions kill values too. This implements DeadStoreElim/free.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15199 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:58:38 +00:00
Chris Lattner
9ec6e46ad8 New testcase for DSE
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15198 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:57:50 +00:00
Chris Lattner
5c88260f70 Add support for free instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15197 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:57:37 +00:00
Chris Lattner
c25b55a5b2 Fix the sense of joinable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15196 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:47:25 +00:00
Chris Lattner
d67e439241 Remove linux/solaris specific stuff.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15195 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:34:00 +00:00
Chris Lattner
f542649f1b This patch makes use of the infrastructure implemented before to safely and
aggressively coallesce live ranges even if they overlap.  Consider this LLVM
code for example:

int %test(int %X) {
        %Y = mul int %X, 1      ;; Codegens to Y = X
        %Z = add int %X, %Y
        ret int %Z
}

The mul is just there to get a copy into the code stream.  This produces
this machine code:

 (0x869e5a8, LLVM BB @0x869b9a0):
        %reg1024 = mov <fi#-2>, 1, %NOREG, 0    ;; "X"
        %reg1025 = mov %reg1024                 ;; "Y"  (subsumed by X)
        %reg1026 = add %reg1024, %reg1025
        %EAX = mov %reg1026
        ret

Note that the life times of reg1024 and reg1025 overlap, even though they
contain the same value.  This results in this machine code:

test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        add %EAX, %ECX
        ret

Another, worse case involves loops and PHI nodes.  Consider this trivial loop:
testcase:

int %test2(int %X) {
entry:
        br label %Loop
Loop:
        %Y = phi int [%X, %entry], [%Z, %Loop]
        %Z = add int %Y, 1
        %cond = seteq int %Z, 100
        br bool %cond, label %Out, label %Loop
Out:
        ret int %Z
}

Because of interactions between the PHI elimination pass and the register
allocator, this got compiled to this code:

test2:
        mov %ECX, DWORD PTR [%ESP + 4]
.LBBtest2_1:
***     mov %EAX, %ECX
        inc %EAX
        cmp %EAX, 100
***     mov %ECX, %EAX
        jne .LBBtest2_1

        ret

Or on powerpc, this code:

_test2:
        mflr r0
        stw r0, 8(r1)
        stwu r1, -60(r1)
.LBB_test2_1:
        addi r2, r3, 1
        cmpwi cr0, r2, 100
***     or r3, r2, r2
        bne cr0, .LBB_test2_1

***     or r3, r2, r2
        lwz r0, 68(r1)
        mtlr r0
        addi r1, r1, 60
        blr 0



With this improvement in place, we now generate this code for these two
testcases, which is what we want:


test:
        mov %EAX, DWORD PTR [%ESP + 4]
        add %EAX, %EAX
        ret

test2:
        mov %EAX, DWORD PTR [%ESP + 4]
.LBBtest2_1:
        inc %EAX
        cmp %EAX, 100
        jne .LBBtest2_1 # Loop
        ret

Or on PPC:

_test2:
        mflr r0
        stw r0, 8(r1)
        stwu r1, -60(r1)
.LBB_test2_1:
        addi r3, r3, 1
        cmpwi cr0, r3, 100
        bne cr0, .LBB_test2_1

        lwz r0, 68(r1)
        mtlr r0
        addi r1, r1, 60
        blr 0


Static numbers for spill code loads/stores/reg-reg copies (smaller is better):

em3d:       before: 47/25/26         after: 44/22/24
164.gzip:   before: 433/245/310      after: 403/231/278
175.vpr:    before: 3721/2189/1581   after: 4144/2081/1423
176.gcc:    before: 26195/8866/9235  after: 25942/8082/8275
186.crafty: before: 4295/2587/3079   after: 4119/2519/2916
252.eon:    before: 12754/7585/5803  after: 12508/7425/5643
256.bzip2:  before: 463/226/315      after: 482:241/309


Runtime perf number samples on X86:

gzip: before: 41.09 after: 39.86
bzip2: runtime: before: 56.71s after: 57.07s
gcc: before: 6.16 after: 6.12
eon: before: 2.03s after: 2.00s


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15194 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:11:19 +00:00
Chris Lattner
d3a205eab5 Make a method const, no functionality changes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15193 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 06:23:01 +00:00
Chris Lattner
1d6dc97463 I think that V8 should coallesce registers, don't you?
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15192 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 06:19:04 +00:00
Alkis Evlogimenos
89756ea109 Use name.empty() instead of testing against equality with the empty
string.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15191 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 06:16:52 +00:00
Alkis Evlogimenos
83949fcf7c Disallow creation of named values of type void.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15190 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 06:07:15 +00:00
Chris Lattner
62d4e16a05 Fix a bug where we incorrectly value numbered the first PHI definition the
same as the PHI use.  This is not correct as the PHI use value is different
depending on which branch is taken.  This fixes espresso with aggressive
coallescing, and perhaps others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15189 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 05:45:18 +00:00
Chris Lattner
6925a9f9cc Fix a bug in the range remover
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15188 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 05:43:53 +00:00
Chris Lattner
c83e40d1b6 Add debugging output for joining assignments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15187 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 03:24:11 +00:00
Alkis Evlogimenos
3f86193cd2 Remove implementation of operator= and make it private so that it is
not used accidentally.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15172 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 18:55:15 +00:00
Alkis Evlogimenos
a1613db62f Change std::map<unsigned, LiveInterval*> into a std::map<unsigned,
LiveInterval>. This saves some space and removes the pointer
indirection caused by following the pointer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15167 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 11:44:15 +00:00
Chris Lattner
7d91e49ff7 Finally give bugpoint -timeout support!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15163 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 07:53:26 +00:00
Chris Lattner
c47b6677ae obvious fix
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15162 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 07:51:27 +00:00
Chris Lattner
21ddf17ff6 Get rid of the printout from the low-level system interface
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15161 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 07:50:48 +00:00