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139 Commits

Author SHA1 Message Date
Eli Friedman 6dda916358 Simplify declarations slightly by using typedefs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129720 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-18 21:21:37 +00:00
Jakob Stoklund Olesen cb6404711b Add LiveIntervals::getLastSplitPoint(). 
A live range cannot be split everywhere in a basic block. A split must go before
the first terminator, and if the variable is live into a landing pad, the split
must happen before the call that can throw.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124894 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-04 19:33:11 +00:00
Jakob Stoklund Olesen 04223909b7 Try for the third time to teach getFirstTerminator() about debug values. 
This time let's rephrase to trick gcc-4.3 into not miscompiling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123432 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 06:33:45 +00:00
Jakob Stoklund Olesen b6436e5be1 Revert r123419. It still breaks llvm-gcc-i386-linux-selfhost. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123423 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 02:12:54 +00:00
Jakob Stoklund Olesen 09befe9036 Try again to teach getFirstTerminator() about debug values. 
Fix some callers to better deal with debug values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123419 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 01:17:53 +00:00
Jakob Stoklund Olesen 4f28c1c714 Teach frame lowering to ignore debug values after the terminators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123399 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-13 21:28:52 +00:00
Devang Patel a851fd8cd8 Speculatively revert r123384 to make llvm-gcc-i386-linux-selfhost buildbot happy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123389 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-13 19:27:50 +00:00
Jakob Stoklund Olesen 64f865ceca Teach MachineBasicBlock::getFirstTerminator to ignore debug values. 
It will still return an iterator that points to the first terminator or end(),
but there may be DBG_VALUE instructions following the first terminator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123384 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-13 18:41:05 +00:00
Jakob Stoklund Olesen 668c9e31df Add missing space in debug output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123351 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-13 00:57:35 +00:00
Jakob Stoklund Olesen 4314268128 Replace TargetRegisterInfo::printReg with a PrintReg class that also works without a TRI instance. 
Print virtual registers numbered from 0 instead of the arbitrary
FirstVirtualRegister. The first virtual register is printed as %vreg0.
TRI::NoRegister is printed as %noreg.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123107 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-09 03:05:53 +00:00
Jakob Stoklund Olesen 371e82bf51 Don't try to split weird critical edges that really aren't: 
BB#1: derived from LLVM BB %bb.nph28
    Live Ins: %AL
    Predecessors according to CFG: BB#0
	TEST8rr %reg16384<kill>, %reg16384, %EFLAGS<imp-def>; GR8:%reg16384
	JNE_4 <BB#2>, %EFLAGS<imp-use,kill>
	JMP_4 <BB#2>
    Successors according to CFG: BB#2 BB#2

These double CFG edges only ever occur in bugpoint-generated code, so there is
no need to attempt something clever.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117992 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-02 00:58:37 +00:00
Jakob Stoklund Olesen 92095e7b3f Add SkipPHIsAndLabels from PHIElimination to MachineBasicBlock. It is needed 
elsewhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117763 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-30 01:26:14 +00:00
Jakob Stoklund Olesen f4a1e1a69f Teach MachineBasicBlock::print() to annotate instructions and blocks with 
SlotIndexes when available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117392 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-26 20:21:46 +00:00
Evan Cheng 19708923be Properly update MachineDominators when splitting critical edge. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111574 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-19 23:32:47 +00:00
Evan Cheng e008384508 Move the decision logic whether it's a good idea to split a critical edge to clients. Also fixed an erroneous check. An edge is only a back edge when the from and to blocks are in the same loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111256 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-17 17:43:50 +00:00
Evan Cheng 087fbeb7d1 Fix debug message. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111250 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-17 17:15:14 +00:00
Evan Cheng 97b9b97853 PHI elimination should not break back edge. It can cause some significant code placement issues. rdar://8263994 
good:
LBB0_2:
  mov     r2, r0
  . . .
  mov     r1, r2
  bne     LBB0_2

bad:
LBB0_2:
  mov     r2, r0
  . . .
@ BB#3:
  mov     r1, r2
  b       LBB0_2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111221 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-17 01:20:36 +00:00
Dan Gohman d463a74464 Add a getFirstNonPHI utility function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107778 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-07 14:33:51 +00:00
Dan Gohman 14152b480d Reapply r107655 with fixes; insert the pseudo instruction into 
the block before calling the expansion hook. And don't
put EFLAGS in a mbb's live-in list twice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107691 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-06 20:24:04 +00:00
Dan Gohman 258c58cc62 Revert r107655. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107668 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-06 15:49:48 +00:00
Dan Gohman b81c771c0d Fix a bunch of custom-inserter functions to handle the case where 
the pseudo instruction is not at the end of the block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107655 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-06 15:18:19 +00:00
Dan Gohman 853d3fb8d2 Move PHIElimination's SplitCriticalEdge for MachineBasicBlocks out 
into a utility routine, teach it how to update MachineLoopInfo, and
make use of it in MachineLICM to split critical edges on demand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106555 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-22 17:25:57 +00:00
Stuart Hastings 3bf9125933 Add a DebugLoc parameter to TargetInstrInfo::InsertBranch(). This 
addresses a longstanding deficiency noted in many FIXMEs scattered
across all the targets.

This effectively moves the problem up one level, replacing eleven
FIXMEs in the targets with eight FIXMEs in CodeGen, plus one path
through FastISel where we actually supply a DebugLoc, fixing Radar
7421831.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106243 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-17 22:43:56 +00:00
Dan Gohman 81bf03eb5c Eliminate MachineBasicBlock::const_livein_iterator and make 
MachineBasicBlock::livein_iterator a const_iterator, because
clients shouldn't ever be using the iterator interface to
mutate the livein set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101147 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-13 16:57:55 +00:00
Bill Wendling e543d161a0 Reapply r100056. It doesn't look like it's the one that's causing a failure. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100065 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-01 00:00:43 +00:00