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15938 Commits

Author SHA1 Message Date
Chris Lattner
f50d87eb50 Rewrite the branch selector to be correct in the face of large functions. 
The algorithm it used before wasn't 100% correct, we now use an iterative
expansion model.  This fixes assembler errors when compiling 403.gcc with
tail merging enabled.

Change the way the branch selector works overall: Now, the isel generates
PPC::BCC instructions (as it used to) directly, and these BCC instructions
are emitted to the output or jitted directly if branches don't need
expansion.  Only if branches need expansion are instructions rewritten
and created.  This should make branch select faster, and eliminates the
Bxx instructions from the .td file.

llvm-svn: 31837
 2006-11-18 00:32:03 +00:00
Chris Lattner
a5439b7913 add encoding for BCC, after finally wrestling strange ppc/tblgen endianness 
issues to the ground.

llvm-svn: 31836
 2006-11-17 23:53:28 +00:00
Chris Lattner
0d88b19f2f convert PPC::BCC to use the 'pred' operand instead of separate predicate 
value and CR reg #.  This requires swapping the order of these everywhere
that touches BCC and requires us to write custom matching logic for
PPCcondbranch :(

llvm-svn: 31835
 2006-11-17 22:37:34 +00:00
Chris Lattner
73329ae80d rename PPC::COND_BRANCH to PPC::BCC 
llvm-svn: 31834
 2006-11-17 22:14:47 +00:00
Chris Lattner
1527483a15 start using PPC predicates more consistently. 
llvm-svn: 31833
 2006-11-17 22:10:59 +00:00
Evan Cheng
a9176b38f9 For unsigned 8-bit division. Use movzbw to set the lower 8 bits of AX while 
clearing the upper 8-bits instead of issuing two instructions. This also
eliminates the need to target the AH register which can be problematic on
x86-64.

llvm-svn: 31832
 2006-11-17 22:10:14 +00:00
Jim Laskey
bc27bd0c6e Hopefully a good crack at making debugging work on intel -disable-fp-elim. 
llvm-svn: 31830
 2006-11-17 21:19:15 +00:00
Jim Laskey
a1f032c03a Assert unhandled case. 
llvm-svn: 31828
 2006-11-17 18:49:39 +00:00
Jim Laskey
b56f73f709 1. Ignore the -disable-fp-elim when the routine is a leaf. 
2. Offsets on 64-bit stores are still in bytes.

llvm-svn: 31824
 2006-11-17 16:09:31 +00:00
Jim Laskey
e0ff7bdbd3 Typo. Fix the nightly tests. 
llvm-svn: 31823
 2006-11-17 14:06:41 +00:00
Jim Laskey
a87c9d8905 Fixing the ENABLE_OPTIMIZED=1 DISABLE_ASSERTIONS=1 build. 
llvm-svn: 31822
 2006-11-17 13:07:55 +00:00
Bill Wendling
a3ba38284c Moved definition of llvm_ostream wrappers to the Streams.cpp file. 
llvm-svn: 31819
 2006-11-17 09:54:47 +00:00
Bill Wendling
dbbb5112c5 Added wrappers for the std::cerr/std::cout objects. The wrappers will 
soon replace all uses of those objects.

llvm-svn: 31817
 2006-11-17 09:51:22 +00:00
Bill Wendling
2f40f19e0d Needed <iostream> for now. 
llvm-svn: 31816
 2006-11-17 09:44:28 +00:00
Bill Wendling
42b8ad7362 Needs the iostream include. 
llvm-svn: 31815
 2006-11-17 09:38:03 +00:00
Bill Wendling
1838be30c7 Removed iostream #includes. Replaced std::cerr with DOUT. 
llvm-svn: 31814
 2006-11-17 08:03:48 +00:00
Bill Wendling
b6061e32fa Removed even more std::cerr and #include <iostream> things. 
llvm-svn: 31813
 2006-11-17 07:52:03 +00:00
Bill Wendling
e4bdd79300 Replaced DEBUG(std::cerr with DOUT. 
llvm-svn: 31812
 2006-11-17 07:36:54 +00:00
Bill Wendling
ccae1fe7c7 Replace DEBUG(std::cerr with DOUT. Removed some iostream #includes. 
llvm-svn: 31811
 2006-11-17 07:33:59 +00:00
Bill Wendling
3244a7dc35 Removed unneeded <iostream> #include. 
llvm-svn: 31810
 2006-11-17 07:10:51 +00:00
Chris Lattner
cc4df7e0ab If an indvar with a variable stride is used by the exit condition, go ahead 
and handle it like constant stride vars.  This fixes some bad codegen in
variable stride cases.  For example, it compiles this:

void foo(int k, int i) {
  for (k=i+i; k <= 8192; k+=i)
    flags2[k] = 0;
}

to:

LBB1_1: #bb.preheader
        movl %eax, %ecx
        addl %ecx, %ecx
        movl L_flags2$non_lazy_ptr, %edx
LBB1_2: #bb
        movb $0, (%edx,%ecx)
        addl %eax, %ecx
        cmpl $8192, %ecx
        jle LBB1_2      #bb
LBB1_5: #return
        ret

or (if the array is local and we are in dynamic-nonpic or static mode):

LBB3_2: #bb
        movb $0, _flags2(%ecx)
        addl %eax, %ecx
        cmpl $8192, %ecx
        jle LBB3_2      #bb

and:

        lis r2, ha16(L_flags2$non_lazy_ptr)
        lwz r2, lo16(L_flags2$non_lazy_ptr)(r2)
        slwi r3, r4, 1
LBB1_2: ;bb
        li r5, 0
        add r6, r4, r3
        stbx r5, r2, r3
        cmpwi cr0, r6, 8192
        bgt cr0, LBB1_5 ;return

instead of:

        leal (%eax,%eax,2), %ecx
        movl %eax, %edx
        addl %edx, %edx
        addl L_flags2$non_lazy_ptr, %edx
        xorl %esi, %esi
LBB1_2: #bb
        movb $0, (%edx,%esi)
        movl %eax, %edi
        addl %esi, %edi
        addl %ecx, %esi
        cmpl $8192, %esi
        jg LBB1_5       #return

and:

        lis r2, ha16(L_flags2$non_lazy_ptr)
        lwz r2, lo16(L_flags2$non_lazy_ptr)(r2)
        mulli r3, r4, 3
        slwi r5, r4, 1
        li r6, 0
        add r2, r2, r5
LBB1_2: ;bb
        li r5, 0
        add r7, r3, r6
        stbx r5, r2, r6
        add r6, r4, r6
        cmpwi cr0, r7, 8192
        ble cr0, LBB1_2 ;bb

This speeds up Benchmarks/Shootout/sieve from 8.533s to 6.464s and
implements LoopStrengthReduce/var_stride_used_by_compare.ll

llvm-svn: 31809
 2006-11-17 06:17:33 +00:00
Bill Wendling
dbea653b5d More removal of std::cerr and DEBUG, replacing with DOUT instead. 
llvm-svn: 31806
 2006-11-17 02:09:07 +00:00
Chris Lattner
81683aa08b implement a todo: change a map into a vector 
llvm-svn: 31805
 2006-11-17 01:52:23 +00:00
Bill Wendling
0ae0a45ebe Replace std::cerr uses of the "DEBUG" macro with "DOUT" instead. Removes 
a #include of iostream.

llvm-svn: 31800
 2006-11-17 00:50:36 +00:00
Chris Lattner
e4e113818f fix typo 
llvm-svn: 31799
 2006-11-17 00:49:36 +00:00
Bill Wendling
748f1ae70b Added "DOUT" macro. This is used as a replacement for the std::cerr 
stream. It centralizes the use of std::cerr so that static c'tor/d'tors
aren't scattered around all over the place. The way to use it is like this:

       DOUT << "This is a status line: " << Var << "\n";

If "-debug" is specified, it will print. Otherwise, it'll not print. If
NDEBUG is defined, the DOUT does nothing.

llvm-svn: 31798
 2006-11-17 00:49:12 +00:00
Chris Lattner
237ee79d06 implicit_def_vrrc doesn't generate code. 
llvm-svn: 31797
 2006-11-16 23:49:52 +00:00
Evan Cheng
fc1b3d8bc8 Correct instructions for moving data between GR64 and SSE registers; also correct load i64 / store i64 from v2i64. 
llvm-svn: 31795
 2006-11-16 23:33:25 +00:00
Evan Cheng
a838021d2c Fix a potential bug: MOVPDI2DI, etc. are not copy instructions. 
llvm-svn: 31794
 2006-11-16 23:22:26 +00:00
Jim Laskey
8aac7dc0ee This is a general clean up of the PowerPC ABI. Address several problems and 
bugs including making sure that the TOS links back to the previous frame,
that the maximum call frame size is not included twice when using frame
pointers, no longer growing the frame on calls, double storing of SP and
a cleaner/faster dynamic alloca.

llvm-svn: 31792
 2006-11-16 22:43:37 +00:00
Chris Lattner
5dcf43138d fix a regression that I introduced. stdu should scale the offset by 4 
before printing it.

llvm-svn: 31791
 2006-11-16 21:45:30 +00:00
Evan Cheng
c653e70b2d Align stubs on 4 byte boundary. This fixes 447.dealII. 
llvm-svn: 31790
 2006-11-16 20:13:34 +00:00
Bill Wendling
49d6a1169f *** empty log message *** 
llvm-svn: 31789
 2006-11-16 20:11:33 +00:00
Evan Cheng
2503d332cd Allow target to specify alignment for function stub. 
llvm-svn: 31788
 2006-11-16 20:04:54 +00:00
Evan Cheng
263c558c13 Match MachineCodeEmitter changes. 
llvm-svn: 31787
 2006-11-16 20:04:04 +00:00
Chris Lattner
41280ae60d add a statistic 
llvm-svn: 31785
 2006-11-16 18:13:49 +00:00
Bill Wendling
bcd11344e9 Don't recompute getNumOperands for each iteration. 
llvm-svn: 31783
 2006-11-16 07:35:18 +00:00
Bill Wendling
985d7e09ec Added a new method "CreateNewLiveInterval" which, given a list of 
LiveRanges, creates a new LiveInterval from them. The LiveRanges should
have existed already in another LiveInterval, but removed.

llvm-svn: 31780
 2006-11-16 02:41:50 +00:00
Chris Lattner
283e7306c1 fix broken encoding 
llvm-svn: 31778
 2006-11-16 01:01:28 +00:00
Chris Lattner
0d40275b0e enable the branch folding pass for the JIT. 
llvm-svn: 31777
 2006-11-16 01:00:07 +00:00
Chris Lattner
99d9dd8d07 add ppc64 r+i stores with update. 
llvm-svn: 31776
 2006-11-16 00:57:19 +00:00
Chris Lattner
4edb6f09fe add patterns for ppc32 preinc stores. ppc64 next. 
llvm-svn: 31775
 2006-11-16 00:41:37 +00:00
Chris Lattner
c4b9cff1f9 switch these back to the 'bad old way' 
llvm-svn: 31774
 2006-11-16 00:33:34 +00:00
Evan Cheng
43ba439abd Fix an incorrectly inverted condition. 
llvm-svn: 31773
 2006-11-16 00:08:20 +00:00
Chris Lattner
f505815dad Fix ppc64 epilog bug. 
llvm-svn: 31771
 2006-11-15 23:35:30 +00:00
Chris Lattner
bd95b9d4ae Stop using isTwoAddress, switching to operand constraints instead. 
Tell the codegen emitter that specific operands are not to be encoded, fixing
JIT regressions w.r.t. pre-inc loads and stores (e.g. lwzu, which we generate
even when general preinc loads are not enabled).

llvm-svn: 31770
 2006-11-15 23:24:18 +00:00
Chris Lattner
1158705ea7 add a new field needed by the code emitter generator. 
llvm-svn: 31768
 2006-11-15 22:55:04 +00:00
Evan Cheng
2a92afa25d Properly transfer kill / dead info. 
llvm-svn: 31765
 2006-11-15 20:58:11 +00:00
Evan Cheng
1b3bde1c1b Kill / dead info has been moved to MI's. 
llvm-svn: 31764
 2006-11-15 20:56:39 +00:00
Evan Cheng
4625504fa4 commuteInstruction should propagate kill / dead info. 
llvm-svn: 31763
 2006-11-15 20:56:03 +00:00