2f5bdcb7c2
Don't hoist or sink instructions with physreg uses if the physreg is
...
allocatable. Even if it doesn't appear to have any defs, it may latter
on after register allocation.
llvm-svn: 82834
2009-09-26 02:34:00 +00:00
a317687e85
Fix MachineSink to be able to sink instructions that use physical registers
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which have no defs anywhere in the function. In particular, this fixes sinking
of instructions that reference RIP on x86-64, which is currently being modeled
as a register.
llvm-svn: 82815
2009-09-25 22:53:29 +00:00
5edd45a76b
Simplify this code by using use_iterator instead of reg_iterator
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and skipping the defs.
llvm-svn: 82811
2009-09-25 22:24:52 +00:00
565449d79e
remove std::ostream versions of printing stuff for MBB and MF,
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upgrading a few things to use raw_ostream
llvm-svn: 79811
2009-08-23 03:13:20 +00:00
63aa000052
Convert DOUT to DEBUG(errs()...).
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llvm-svn: 79755
2009-08-22 20:26:23 +00:00
5d79a2c62c
Various comment fixes.
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llvm-svn: 78139
2009-08-05 01:19:01 +00:00
0402315d41
Use setPreservesAll and setPreservesCFG in CodeGen passes.
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llvm-svn: 77754
2009-07-31 23:37:33 +00:00
30c3de6461
fix two problems with machine sinking:
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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
llvm-svn: 68787
2009-04-10 16:38:36 +00:00
2510436e20
Fix PR3522. It's not safe to sink into landing pad BB's.
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llvm-svn: 64582
2009-02-15 08:36:12 +00:00
47a65a167d
Don't sink the instruction if TargetRegisterInfo::isSafeToMoveRegClassDefs doesn't think it's safe. This works around PR1911.
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llvm-svn: 63994
2009-02-07 01:21:47 +00:00
906152a20f
Tidy up #includes, deleting a bunch of unnecessary #includes.
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llvm-svn: 61715
2009-01-05 17:59:02 +00:00
0d1e9a8e04
Switch the MachineOperand accessors back to the short names like
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isReg, etc., from isRegister, etc.
llvm-svn: 57006
2008-10-03 15:45:36 +00:00
38453eebdc
Remove isImm(), isReg(), and friends, in favor of
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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.
llvm-svn: 56189
2008-09-13 17:58:21 +00:00
a79db30d28
Tidy up several unbeseeming casts from pointer to intptr_t.
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llvm-svn: 55779
2008-09-04 17:05:41 +00:00
d78c400b5b
Clean up the use of static and anonymous namespaces. This turned up
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several things that were neither in an anonymous namespace nor static
but not intended to be global.
llvm-svn: 51017
2008-05-13 00:00:25 +00:00
399e1101ba
Refactor some code out of MachineSink into a MachineInstr query.
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llvm-svn: 48311
2008-03-13 00:44:09 +00:00
3a4be0fdef
Rename MRegisterInfo to TargetRegisterInfo.
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llvm-svn: 46930
2008-02-10 18:45:23 +00:00
08af5a9dad
implement support for sinking a load out the bottom of a block that
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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 :(
llvm-svn: 45894
2008-01-12 00:17:41 +00:00
c8226f32e9
Simplify the side effect stuff a bit more and make licm/sinking
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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.
llvm-svn: 45843
2008-01-10 23:08:24 +00:00
f3bd2cd37c
Clamp down on sinking of lots of instructions.
...
llvm-svn: 45841
2008-01-10 22:35:15 +00:00
ee61d14bf6
The current impl is really trivial, add some comments about how it can be made better.
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llvm-svn: 45625
2008-01-05 06:47:58 +00:00
d11ca169e7
don't sink anything with side effects, this makes lots of stuff work, but sinks almost nothing.
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llvm-svn: 45617
2008-01-05 02:33:22 +00:00
6ec78274df
fix a common crash.
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llvm-svn: 45614
2008-01-05 01:39:17 +00:00
f3edc09f9b
Add a really quick hack at a machine code sinking pass, enabled with --enable-sinking.
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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.
llvm-svn: 45570
2008-01-04 07:36:53 +00:00
Dan Gohman