Fix a random missed optimization by making InstCombine more aggressive when determining which bits are demanded by
a comparison against a constant.

llvm-svn: 123203

restore the stack pointer from the frame pointer on thumbv6.

Fixes rdar://8819685

llvm-svn: 123196

llvm-svn: 123193

operation in some cases.

llvm-svn: 123190

llvm-svn: 123189

instructions but are restricted pseudo forms.

llvm-svn: 123177

instructions but are restricted pseudo forms.

llvm-svn: 123176

llvm-svn: 123175

llvm-svn: 123172

llvm-svn: 123171

Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.

llvm-svn: 123170

llvm-svn: 123169

These functions not longer assert when passed 0, but simply return false instead.

No functional change intended.

llvm-svn: 123155

llvm-svn: 123145

llvm-svn: 123142

llvm-svn: 123141

perform rounding other than truncation in the IR. Common C code for this
turns into really an LLVM intrinsic call that blocks a lot of further
optimizations.

llvm-svn: 123135

physical register numbers.

This makes the hack used in LiveInterval official, and lets LiveInterval be
oblivious of stack slots.

The isPhysicalRegister() and isVirtualRegister() predicates don't know about
this, so when a variable may contain a stack slot, isStackSlot() should always
be tested first.

llvm-svn: 123128

llvm-svn: 123126

llvm-svn: 123116

Also, switch to a more clear 'sink' function with its declaration to
avoid any confusion about 'g'. Thanks for the suggestion Frits.

llvm-svn: 123113

llvm-svn: 123112

llvm-svn: 123111

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.

llvm-svn: 123107

llvm-svn: 123103

llvm-svn: 123102

llvm-svn: 123048

Instead encode llvm IR level property "HasSideEffects" in an operand (shared
with IsAlignStack). Added MachineInstrs::hasUnmodeledSideEffects() to check
the operand when the instruction is an INLINEASM.

This allows memory instructions to be moved around INLINEASM instructions.

llvm-svn: 123044

llvm-svn: 123042

llvm-svn: 123040

Patch by Tim Northover.

llvm-svn: 123035

llvm-svn: 123030

Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit.

llvm-svn: 123015

Also fix an off-by-one in SelectionDAGBuilder that was preventing shuffle
vectors from being translated to EXTRACT_SUBVECTOR.
Patch by Tim Northover.

The test changes are needed to keep those spill-q tests from testing aligned
spills and restores.  If the only aligned stack objects are spill slots, we
no longer realign the stack frame.  Prior to this patch, an EXTRACT_SUBVECTOR
was legalized by loading from the stack, which created an aligned frame index.
Now, however, there is nothing except the spill slot in the stack frame, so
I added an aligned alloca.

llvm-svn: 122995

llvm-svn: 122978

llvm-svn: 122970

llvm-svn: 122969

llvm-svn: 122968

llvm-svn: 122966

Patch by Richard Simth.

llvm-svn: 122962