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3420 Commits

Author SHA1 Message Date
Jeff Cohen b622c11f77 Unbreak VC++ build. 
llvm-svn: 34917
 2007-03-05 00:00:42 +00:00
Chris Lattner 47206667c0 fold away addc nodes when we know there cannot be a carry-out. 
llvm-svn: 34913
 2007-03-04 20:40:38 +00:00
Chris Lattner 2dcc6e7f58 generalize 
llvm-svn: 34910
 2007-03-04 20:08:45 +00:00
Chris Lattner e2e13caeb2 canonicalize constants to the RHS of addc/adde. If nothing uses the carry out of 
addc, turn it into add.

This allows us to compile:

long long test(long long A, unsigned B) {
  return (A + ((long long)B << 32)) & 123;
}

into:

_test:
        movl $123, %eax
        andl 4(%esp), %eax
        xorl %edx, %edx
        ret

instead of:
_test:
        xorl %edx, %edx
        movl %edx, %eax
        addl 4(%esp), %eax   ;; add of zero
        andl $123, %eax
        ret

llvm-svn: 34909
 2007-03-04 20:03:15 +00:00
Chris Lattner 362621c7ae eliminate some ops if they have an undef RHS 
llvm-svn: 34908
 2007-03-04 20:01:46 +00:00
Reid Spencer b8825b8c04 Remove unneeded header file. 
llvm-svn: 34903
 2007-03-04 04:41:04 +00:00
Chris Lattner ca401aac31 Fix CodeGen/Generic/fpowi-promote.ll and PR1239 
llvm-svn: 34893
 2007-03-03 23:43:21 +00:00
Chris Lattner 567b9254cd Add an expand action for ISD label which just deletes the label. 
This "fixes" PR1238.

llvm-svn: 34890
 2007-03-03 19:21:38 +00:00
Evan Cheng d74cb0e194 Only propagate IsKill if the last use is a kill. 
llvm-svn: 34878
 2007-03-03 06:32:37 +00:00
Nate Begeman 323cf8f602 http://llvm.org/bugs/show_bug.cgi?id=1237 
llvm-svn: 34875
 2007-03-03 06:18:18 +00:00
Evan Cheng 3fd728596e Watch out for cases like this: 
entry (0x8b056f0, LLVM BB @0x8b01b30, ID#0):
Live Ins: %r0 %r1 %r2 %r3
        %reg1032 = tMOVrr %r3<kill>
        %reg1033 = tMOVri8 1
        %reg1034 = tMOVri8 0
        tCMPi8 %reg1029<kill>, 0
        tBcc mbb<entry,0x8b06a10>, 0
    Successors according to CFG: 0x8b06980 0x8b06a10

entry (0x8b06980, LLVM BB @0x8b01b30, ID#12):
    Predecessors according to CFG: 0x8b056f0
        %reg1036 = tMOVrr %reg1034<kill>
    Successors according to CFG: 0x8b06a10

entry (0x8b06a10, LLVM BB @0x8b01b30, ID#13):
    Predecessors according to CFG: 0x8b056f0 0x8b06980
        %reg1024<dead> = tMOVrr %reg1030<kill>
        ...

reg1030 and r1 have already been joined. When reg1024 and reg1030 are joined,
r1 live range from function entry to the tMOVrr instruction are dead. Eliminate
r1 from the livein set of the entry BB, not the BB where the copy is.

llvm-svn: 34866
 2007-03-03 02:18:00 +00:00
Evan Cheng 155ede21e0 Mark dead def as unused. 
llvm-svn: 34844
 2007-03-02 10:43:16 +00:00
Evan Cheng 9d615d1e70 Dead live-in detection bug. 
llvm-svn: 34843
 2007-03-02 10:41:15 +00:00
Evan Cheng 6605c5dbee - Keep track all def and uses of stack slot available in register. 
- Available value use may be deleted (e.g. noop move).

llvm-svn: 34841
 2007-03-02 08:52:00 +00:00
Evan Cheng 08f2f0d145 Invalidate last use of a reused register if the use is a deleted noop copy. 
llvm-svn: 34839
 2007-03-02 05:41:42 +00:00
Jim Laskey 82af5943d1 Emit eh filter info. 
llvm-svn: 34805
 2007-03-01 20:26:43 +00:00
Jim Laskey 6458e6acb9 Collect eh filter info. 
llvm-svn: 34804
 2007-03-01 20:25:32 +00:00
Jim Laskey d5453d7b56 Lower eh filter intrinsic. 
llvm-svn: 34802
 2007-03-01 20:24:30 +00:00
Evan Cheng 105fb1e0dd Delete register scavenger when done with it. 
llvm-svn: 34786
 2007-03-01 10:23:33 +00:00
Evan Cheng 27bc565497 Add a version of FindUnusedReg that restrict search to a specific set of registers. 
llvm-svn: 34784
 2007-03-01 08:56:24 +00:00
Evan Cheng d6450ba1dc A restore is promoted to copy (or deleted entirely), remove the kill from the last use of the targetted register. 
llvm-svn: 34773
 2007-03-01 02:27:30 +00:00
Evan Cheng 31215d1395 Interface clean up. 
llvm-svn: 34772
 2007-03-01 02:25:51 +00:00
Evan Cheng 428eaa0059 Interface clean up. 
llvm-svn: 34770
 2007-03-01 02:19:39 +00:00
Evan Cheng 9be123c568 Oops. 
llvm-svn: 34768
 2007-03-01 02:05:35 +00:00
Evan Cheng 8a703ad4b6 Track all joined registers and eliminate unneeded kills after all joining are done. 
llvm-svn: 34767
 2007-03-01 02:03:03 +00:00
Jim Laskey 644af6b68f Chain is on second operand. 
llvm-svn: 34759
 2007-02-28 20:43:58 +00:00
Jim Laskey c46bf3577d Handle mix of personalities. 
llvm-svn: 34752
 2007-02-28 18:38:31 +00:00
Jim Laskey c114990526 Provide a more meaningful name. 
llvm-svn: 34751
 2007-02-28 18:37:50 +00:00
Jim Laskey cf465fcebc MERGE_VALUES unnecessary. 
llvm-svn: 34750
 2007-02-28 18:37:04 +00:00
Nate Begeman 37dc4b5bb3 Fix a typo, thanks Bill! 
llvm-svn: 34741
 2007-02-28 09:16:38 +00:00
Nate Begeman e0232ec706 More Mach-O writer improvements. 
llvm-svn: 34740
 2007-02-28 07:40:50 +00:00
Chris Lattner 74bb92902e add methods for analysis of call results and return nodes. 
llvm-svn: 34738
 2007-02-28 07:09:40 +00:00
Chris Lattner e74744143f add methods to analyze calls and formals. 
llvm-svn: 34736
 2007-02-28 06:56:37 +00:00
Chris Lattner b5582bf984 add a newline at end of file 
llvm-svn: 34735
 2007-02-28 06:42:11 +00:00
Evan Cheng e8af69632f Make requiresRegisterScavenging determination on a per MachineFunction basis. 
llvm-svn: 34711
 2007-02-28 00:59:19 +00:00
Evan Cheng 589ba3964b MRegisterInfo disowns RegScavenger. It's immutable. 
llvm-svn: 34706
 2007-02-28 00:17:36 +00:00
Evan Cheng a7e4b60b85 Some more code clean up. 
llvm-svn: 34700
 2007-02-27 22:58:43 +00:00
Evan Cheng 8a8dc04e7e Oops. 
llvm-svn: 34698
 2007-02-27 22:10:52 +00:00
Evan Cheng e50a994cba Let MRegisterInfo now owns RegScavenger. 
llvm-svn: 34691
 2007-02-27 21:10:33 +00:00
Evan Cheng 51f54640de RegScavenger interface change to make it more flexible. 
llvm-svn: 34690
 2007-02-27 21:09:48 +00:00
Chris Lattner 9f059194a7 Minor refactoring of CC Lowering interfaces 
llvm-svn: 34656
 2007-02-27 05:13:54 +00:00
Chris Lattner dc3adc83e7 move CC Lowering stuff to its own public interface 
llvm-svn: 34655
 2007-02-27 04:43:02 +00:00
Evan Cheng ca25c0ee0d forward() should not increment internal iterator. Its client may insert instruction between now and next forward() call. 
llvm-svn: 34649
 2007-02-27 01:58:48 +00:00
Evan Cheng bdec83e4d2 Joining an interval with a dead copy instruction. Shorten the live range to the last use. 
llvm-svn: 34645
 2007-02-26 21:37:37 +00:00
Chris Lattner fce448f856 Fold (sext (truncate x)) more aggressively, by avoiding creation of a 
sextinreg if not needed.   This is useful in two cases: before legalize,
it avoids creating a sextinreg that will be trivially removed.  After legalize
if the target doesn't support sextinreg, the trunc/sext would not have been
removed before.

llvm-svn: 34621
 2007-02-26 03:13:59 +00:00
Chris Lattner ab5d0ac02c track signedness of formal argument, though we have a fixme here. 
llvm-svn: 34620
 2007-02-26 02:56:58 +00:00
Jim Laskey 14059d958a Fix for PR1224. 
llvm-svn: 34610
 2007-02-25 21:43:59 +00:00
Chris Lattner 8c504cf9a0 optimize duplicate ValueMap lookups 
llvm-svn: 34599
 2007-02-25 18:40:32 +00:00
Evan Cheng 38fd9b074f A couple of more places where a register liveness has been extended and its last kill should be updated accordingly. 
llvm-svn: 34597
 2007-02-25 09:51:27 +00:00
Evan Cheng fb2333a333 Add an assertion. 
llvm-svn: 34596
 2007-02-25 09:47:31 +00:00