llvm-svn: 41149

llvm-svn: 41148

branch is not necessary immediate dominators of merge blcok in all cases.

llvm-svn: 41144

llvm-svn: 41143

Fix GLIBCXX_DEBUG error of comparing two singular iterators

llvm-svn: 41139

If dynamic_stackalloc alignment is > stack alignment, first issue an instruction to align the stack ptr before the decrement.

llvm-svn: 41133

- If a dynamic_stackalloc alignment requirement is <= stack alignment, then the alignment argument is ignored.
- *Always* round up the size of the allocation to multiples of stack
alignment to ensure the stack ptr is never left in an invalid state after a dynamic_stackalloc.

llvm-svn: 41132

llvm-svn: 41131

what they're supposed to be before using them.

llvm-svn: 41130

llvm-svn: 41129

llvm-svn: 41128

time performance win in most cases.

llvm-svn: 41126

two's complement bignum arithmetic.  They could be used to
implement much of APInt, but the idea is they are enough to
implement APFloat as well, which the current APInt interface
is not suited for.

Patch by Neil Booth!

llvm-svn: 41124

1. Eliminate redundant error messages. LinkInFile and LinkInArchive
   already call the error() method in each case so there's no use
   telling the user again that an item couldn't be linked in.

2. Improve the formatting of error messages (separating content).

3. Change the wording for the warning about unrecognized files. Make
   it clear that the file is being ignored.

llvm-svn: 41121

Fix some kill info update bugs; add hidden option -disable-rematerialization to turn off remat for debugging.

llvm-svn: 41118

reported to the end user.

llvm-svn: 41117

Fix PR1287.

llvm-svn: 41112

llvm-svn: 41111

If the source of a move is in spill slot, the reload may be folded to essentially a load from stack slot. It's ok to mark the stack slot value as available for reuse. But it should not be clobbered since the destination of the move is live.

llvm-svn: 41109

hard to catch bugs with retaddr lowering

llvm-svn: 41104

llvm-svn: 41103

llvm-svn: 41096

Use dominance frontier to fixup incoming edges of successor blocks not domianted by DeadBB.
Use df_iterator to walk and delete basic blocks dominated by DeadBB.

llvm-svn: 41095

llvm-svn: 41094

llvm-svn: 41093

llvm-svn: 41091

llvm-svn: 41090

- If the defs of a spilled rematerializable MI are dead after the spill store is deleted, delete
  the def MI as well.

llvm-svn: 41086

Fix for PR1596: AdjustCopiesBackFrom() should conservatively check if any of its sub-registers may overlap with the interval of the copy that's being coalesced.

llvm-svn: 41084

If a MI's def is remat as well as spilled, and the store is later deemed dead, mark the def operand as isDead.

llvm-svn: 41083

llvm-svn: 41082

they're not related to eliminating a load.

llvm-svn: 41081

llvm-svn: 41080

llvm-svn: 41078

the function.

llvm-svn: 41077

llvm-svn: 41075

no more uses within the MBB and the spilled value isn't live out of the MBB.
Then it's safe to delete the spill store.

llvm-svn: 41069

spilled value is available for reuse.

llvm-svn: 41067

llvm-svn: 41064

llvm-svn: 41063