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3412 Commits

Author SHA1 Message Date
Evan Cheng
306d12a520 Only propagate IsKill if the last use is a kill. 
llvm-svn: 34878
 2007-03-03 06:32:37 +00:00
Nate Begeman
7ffce4cf16 http://llvm.org/bugs/show_bug.cgi?id=1237 
llvm-svn: 34875
 2007-03-03 06:18:18 +00:00
Evan Cheng
f4e93806fe 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
9dddb88209 Mark dead def as unused. 
llvm-svn: 34844
 2007-03-02 10:43:16 +00:00
Evan Cheng
5bd925036c Dead live-in detection bug. 
llvm-svn: 34843
 2007-03-02 10:41:15 +00:00
Evan Cheng
e2802973eb - 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
622db28794 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
0b6492d5df Emit eh filter info. 
llvm-svn: 34805
 2007-03-01 20:26:43 +00:00
Jim Laskey
73e3ad1b10 Collect eh filter info. 
llvm-svn: 34804
 2007-03-01 20:25:32 +00:00
Jim Laskey
5f932644e9 Lower eh filter intrinsic. 
llvm-svn: 34802
 2007-03-01 20:24:30 +00:00
Evan Cheng
7d470c14cf Delete register scavenger when done with it. 
llvm-svn: 34786
 2007-03-01 10:23:33 +00:00
Evan Cheng
0aa68b9246 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
ad431d7a94 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
ce7f2618a9 Interface clean up. 
llvm-svn: 34772
 2007-03-01 02:25:51 +00:00
Evan Cheng
15a878202b Interface clean up. 
llvm-svn: 34770
 2007-03-01 02:19:39 +00:00
Evan Cheng
938b4d7817 Oops. 
llvm-svn: 34768
 2007-03-01 02:05:35 +00:00
Evan Cheng
d1fa618990 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
6dd0f88e75 Chain is on second operand. 
llvm-svn: 34759
 2007-02-28 20:43:58 +00:00
Jim Laskey
6b2170fefe Handle mix of personalities. 
llvm-svn: 34752
 2007-02-28 18:38:31 +00:00
Jim Laskey
1fea0fa316 Provide a more meaningful name. 
llvm-svn: 34751
 2007-02-28 18:37:50 +00:00
Jim Laskey
83d6baee5b MERGE_VALUES unnecessary. 
llvm-svn: 34750
 2007-02-28 18:37:04 +00:00
Nate Begeman
7beafa54b3 Fix a typo, thanks Bill! 
llvm-svn: 34741
 2007-02-28 09:16:38 +00:00
Nate Begeman
2288ec3331 More Mach-O writer improvements. 
llvm-svn: 34740
 2007-02-28 07:40:50 +00:00
Chris Lattner
6d383bd2f1 add methods for analysis of call results and return nodes. 
llvm-svn: 34738
 2007-02-28 07:09:40 +00:00
Chris Lattner
a68a949ba5 add methods to analyze calls and formals. 
llvm-svn: 34736
 2007-02-28 06:56:37 +00:00
Chris Lattner
5a20764bbb add a newline at end of file 
llvm-svn: 34735
 2007-02-28 06:42:11 +00:00
Evan Cheng
db591ecaa8 Make requiresRegisterScavenging determination on a per MachineFunction basis. 
llvm-svn: 34711
 2007-02-28 00:59:19 +00:00
Evan Cheng
ee2e5de4fb MRegisterInfo disowns RegScavenger. It's immutable. 
llvm-svn: 34706
 2007-02-28 00:17:36 +00:00
Evan Cheng
ec12bdd7ea Some more code clean up. 
llvm-svn: 34700
 2007-02-27 22:58:43 +00:00
Evan Cheng
2402ddad92 Oops. 
llvm-svn: 34698
 2007-02-27 22:10:52 +00:00
Evan Cheng
4c4e56df47 Let MRegisterInfo now owns RegScavenger. 
llvm-svn: 34691
 2007-02-27 21:10:33 +00:00
Evan Cheng
f03b87c1ff RegScavenger interface change to make it more flexible. 
llvm-svn: 34690
 2007-02-27 21:09:48 +00:00
Chris Lattner
11a1c2113c Minor refactoring of CC Lowering interfaces 
llvm-svn: 34656
 2007-02-27 05:13:54 +00:00
Chris Lattner
e34136f6d5 move CC Lowering stuff to its own public interface 
llvm-svn: 34655
 2007-02-27 04:43:02 +00:00
Evan Cheng
341fc2bf88 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
0fd5788077 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
65de507797 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
38db1ad2ab track signedness of formal argument, though we have a fixme here. 
llvm-svn: 34620
 2007-02-26 02:56:58 +00:00
Jim Laskey
c2e9ceb475 Fix for PR1224. 
llvm-svn: 34610
 2007-02-25 21:43:59 +00:00
Chris Lattner
a9c561b9e6 optimize duplicate ValueMap lookups 
llvm-svn: 34599
 2007-02-25 18:40:32 +00:00
Evan Cheng
550798e5d5 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
13e48f975c Add an assertion. 
llvm-svn: 34596
 2007-02-25 09:47:31 +00:00
Evan Cheng
189678c421 Fix a couple of bugs related IsDead back propagation during coalescing. 
llvm-svn: 34595
 2007-02-25 09:46:31 +00:00
Evan Cheng
8f3e6bfeb3 If the liveinterval of the source instruction has been extended, remove the IsKill marker. 
llvm-svn: 34594
 2007-02-25 09:41:59 +00:00
Evan Cheng
9968353d64 Only add liveinterval to livein set if it isn't assigned a stack slot. 
llvm-svn: 34593
 2007-02-25 09:39:02 +00:00
Chris Lattner
e9c4c19b27 fold trivial token factor nodes. This allows us to compile 
test/CodeGen/X86/fp-stack-ret.ll into:

        movl 4(%esp), %eax
        fldl (%eax)
        ret

instead of:

        subl $12, %esp
        movl 16(%esp), %eax
        movsd (%eax), %xmm0
        movsd %xmm0, (%esp)
        fldl (%esp)
        addl $12, %esp
        ret

by eliminating a token factor that blocked a check.

llvm-svn: 34584
 2007-02-25 08:24:27 +00:00
Chris Lattner
b9f2992e38 initialize a instance variable 
llvm-svn: 34567
 2007-02-25 01:28:05 +00:00
Jim Laskey
53e71a9657 Deal with cases when MMI is not requested. 
llvm-svn: 34556
 2007-02-24 09:45:44 +00:00
Jim Laskey
10c6c6b46d Drop unused operand. 
llvm-svn: 34555
 2007-02-24 09:44:17 +00:00
Chris Lattner
6faf9e8e97 Fix CodeGen/Generic/2007-02-23-DAGCombine-Miscompile.ll and PR1219 
llvm-svn: 34551
 2007-02-24 02:09:29 +00:00