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72 Commits

Author SHA1 Message Date
Dan Gohman
29438d13e0 Simplify this code by using use_iterator instead of reg_iterator 
and skipping the defs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82811 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-25 22:24:52 +00:00
Chris Lattner
cf143a4d91 remove std::ostream versions of printing stuff for MBB and MF, 
upgrading a few things to use raw_ostream


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79811 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-23 03:13:20 +00:00
Bill Wendling
1e973aae79 Convert DOUT to DEBUG(errs()...). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79755 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-22 20:26:23 +00:00
Dan Gohman
a5225add0d Various comment fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78139 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-05 01:19:01 +00:00
Dan Gohman
845012e6d3 Use setPreservesAll and setPreservesCFG in CodeGen passes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-31 23:37:33 +00:00
Chris Lattner
296185c264 fix two problems with machine sinking: 
1. Sinking would crash when the first instruction of a block was
   sunk due to iterator problems.
2. Instructions could be sunk to their current block, causing an
   infinite loop.

This fixes PR3968


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68787 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-10 16:38:36 +00:00
Evan Cheng
b599979ab5 Fix PR3522. It's not safe to sink into landing pad BB's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64582 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-15 08:36:12 +00:00
Evan Cheng
b6f5417edb Don't sink the instruction if TargetRegisterInfo::isSafeToMoveRegClassDefs doesn't think it's safe. This works around PR1911. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63994 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-07 01:21:47 +00:00
Dan Gohman
d68a07650c Tidy up #includes, deleting a bunch of unnecessary #includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61715 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-05 17:59:02 +00:00
Dan Gohman
d735b8019b Switch the MachineOperand accessors back to the short names like 
isReg, etc., from isRegister, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-03 15:45:36 +00:00
Dan Gohman
014278e6a1 Remove isImm(), isReg(), and friends, in favor of 
isImmediate(), isRegister(), and friends, to avoid confusion
about having two different names with the same meaning. I'm
not attached to the longer names, and would be ok with
changing to the shorter names if others prefer it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56189 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-13 17:58:21 +00:00
Dan Gohman
ae73dc1448 Tidy up several unbeseeming casts from pointer to intptr_t. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55779 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 17:05:41 +00:00
Dan Gohman
844731a7f1 Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-13 00:00:25 +00:00
Evan Cheng
b27087f5aa Refactor some code out of MachineSink into a MachineInstr query. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48311 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 00:44:09 +00:00
Dan Gohman
6f0d024a53 Rename MRegisterInfo to TargetRegisterInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46930 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-10 18:45:23 +00:00
Chris Lattner
aad193a7e9 implement support for sinking a load out the bottom of a block that 
has no stores between the load and the end of block.  This works 
great and sinks hundreds of stores, but we can't turn it on because
machineinstrs don't have volatility information and we don't want to
sink volatile stores :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45894 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-12 00:17:41 +00:00
Chris Lattner
a22edc82ca Simplify the side effect stuff a bit more and make licm/sinking 
both work right according to the new flags.

This removes the TII::isReallySideEffectFree predicate, and adds
TII::isInvariantLoad. 

It removes NeverHasSideEffects+MayHaveSideEffects and adds
UnmodeledSideEffects as machine instr flags.  Now the clients
can decide everything they need.

I think isRematerializable can be implemented in terms of the
flags we have now, though I will let others tackle that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45843 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 23:08:24 +00:00
Chris Lattner
2445888208 Clamp down on sinking of lots of instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45841 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 22:35:15 +00:00
Chris Lattner
e430e1c072 The current impl is really trivial, add some comments about how it can be made better. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45625 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-05 06:47:58 +00:00
Chris Lattner
ba84ed7e92 don't sink anything with side effects, this makes lots of stuff work, but sinks almost nothing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45617 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-05 02:33:22 +00:00
Chris Lattner
9bb459b554 fix a common crash. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45614 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-05 01:39:17 +00:00
Chris Lattner
c4ce73f666 Add a really quick hack at a machine code sinking pass, enabled with --enable-sinking. 
It is missing validity checks, so it is known broken.  However, it is powerful enough
to compile this contrived code:

void test1(int C, double A, double B, double *P) {
  double Tmp = A*A+B*B;
  *P = C ? Tmp : A;
}

into:

_test1:
	movsd	8(%esp), %xmm0
	cmpl	$0, 4(%esp)
	je	LBB1_2	# entry
LBB1_1:	# entry
	movsd	16(%esp), %xmm1
	mulsd	%xmm1, %xmm1
	mulsd	%xmm0, %xmm0
	addsd	%xmm1, %xmm0
LBB1_2:	# entry
	movl	24(%esp), %eax
	movsd	%xmm0, (%eax)
	ret

instead of:

_test1:
	movsd	16(%esp), %xmm0
	mulsd	%xmm0, %xmm0
	movsd	8(%esp), %xmm1
	movapd	%xmm1, %xmm2
	mulsd	%xmm2, %xmm2
	addsd	%xmm0, %xmm2
	cmpl	$0, 4(%esp)
	je	LBB1_2	# entry
LBB1_1:	# entry
	movapd	%xmm2, %xmm1
LBB1_2:	# entry
	movl	24(%esp), %eax
	movsd	%xmm1, (%eax)
	ret

woo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45570 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-04 07:36:53 +00:00