Do some cleanups suggested by Chris.

llvm-svn: 87034

Set the ReloadReuse AsmPrinter flag where appropriate.

llvm-svn: 87030

llvm-svn: 87024

and don't assume that the call doesn't throw. It would be nice if there were a
way to determine which is the callee and which is a parameter. In practice, the
architecture we care about normally only have one operand for a call instruction
(x86 and arm).

llvm-svn: 87023

Add a bool flag to StackObjects telling whether they reference spill
slots.  The AsmPrinter will use this information to determine whether to
print a spill/reload comment.

Remove default argument values.  It's too easy to pass a wrong argument
value when multiple arguments have default values.  Make everything
explicit to trap bugs early.

Update all targets to adhere to the new interfaces..

llvm-svn: 87022

StringsEqualNoCase (from StringExtras.h) to it.

llvm-svn: 87020

Make FixedStackPseudoSourceValue a first-class PseudoSourceValue by
making it visible to clients and adding LLVM-style cast capability.
This will be used by AsmPrinter to determine when to emit spill comments
for an instruction.

llvm-svn: 87019

llvm-svn: 87015

"Attach debug info with llvm instructions" mode was enabled a month ago. Now make it permanent and remove old way of inserting intrinsics to encode debug info for line number and scopes.

llvm-svn: 87014

llvm-svn: 86972

MachineBasicBlock so other passes can utilize it.

llvm-svn: 86947

llvm-svn: 86928

llvm-svn: 86926

Fixed an iteration condition in PreAllocSplitting. This should fix some miscompilations casued by PreAllocSplitting.

llvm-svn: 86919

can be made to fall through into the other.

llvm-svn: 86909

"nounwind" attribute.

llvm-svn: 86897

instead of typedefs for std::pair. This simplifies the type of
SameTails, which previously was std::vector<std::pair<std::vector<std::pair<unsigned, MachineBasicBlock *> >::iterator, MachineBasicBlock::iterator>

llvm-svn: 86885

x86 users can now return arbitrary sized structs.  Structs too large to fit in return registers will be returned through a hidden sret parameter introduced during SelectionDAG construction.

llvm-svn: 86876

llvm-svn: 86875

llvm-svn: 86874

llvm-svn: 86873

tail merging support to handle more cases.
 - Recognize several cases where tail merging is beneficial even when
   the tail size is smaller than the generic threshold.
 - Make use of MachineInstrDesc::isBarrier to help detect
   non-fallthrough blocks.
 - Check for and avoid disrupting fall-through edges in more cases.

llvm-svn: 86871

- Edges are split before any phis are eliminated, so the code is SSA.

- Create a proper IR BasicBlock for the split edges.

- LiveVariables::addNewBlock now has same syntax as
  MachineDominatorTree::addNewBlock. Algorithm calculates predecessor live-out
  set rather than successor live-in set.

This feature still causes some miscompilations.

llvm-svn: 86867

llvm-svn: 86856

llvm-svn: 86855

the numbers mean.

llvm-svn: 86854

llvm-svn: 86853

llvm-svn: 86794

function it's generated for.

llvm-svn: 86779

llvm-svn: 86771

llvm-svn: 86763

llvm-svn: 86753

constant whose component type is not a legal type for the target.
(If the target ConstantPool cannot handle this type either, it has
an opportunity to merge elements.  In practice any target with
8-bit bytes must support i8 *as data*).  7320806 (partial).

llvm-svn: 86751

llvm-svn: 86748

Critical edges leading to a PHI node are split when the PHI source variable is
live out from the predecessor block. This help the coalescer eliminate more
PHI joins.

llvm-svn: 86725

Clean up some whitespace.
No functional changes.

llvm-svn: 86724

just throw them away.

llvm-svn: 86678

llvm-svn: 86642

llvm-svn: 86641

This patch forbids implicit conversion of DenseMap::const_iterator to
DenseMap::iterator which was possible because DenseMapIterator inherited
(publicly) from DenseMapConstIterator. Conversion the other way around is now
allowed as one may expect.

The template DenseMapConstIterator is removed and the template parameter
IsConst which specifies whether the iterator is constant is added to
DenseMapIterator.

Actually IsConst parameter is not necessary since the constness can be
determined from KeyT but this is not relevant to the fix and can be addressed
later.

Patch by Victor Zverovich!

llvm-svn: 86636