; CHECK: movl {{%e[a-z][xi]}}, %eax

or whatever.

llvm-svn: 82717

llvm-svn: 82716

llvm-svn: 82715

CHECK strings, instead of canonicalizing the patterns directly.  This allows
Pattern to just contain a StringRef instead of std::string.

llvm-svn: 82713

the Pattern class.

llvm-svn: 82712

llvm-svn: 82711

llvm-svn: 82710

llvm-svn: 82709

llvm-svn: 82708

llvm-svn: 82707

functions with names that match the C library.

llvm-svn: 82701

llvm-svn: 82700

Reviewed by Devang Patel.

llvm-svn: 82694

LocalAreaOffset.  (We don't have any of those right now.)
PEI::calculateFrameObjectOffsets includes the absolute value of the
LocalAreaOffset in the cumulative offset value used to calculate the
stack frame size.  It then adds the raw value of the LocalAreaOffset
to the stack size.  For a StackGrowsDown target, that raw value is negative
and has the effect of cancelling out the absolute value that was added
earlier, but that obviously won't work for a StackGrowsUp target.  Change
to subtract the absolute value of the LocalAreaOffset.

llvm-svn: 82693

llvm-svn: 82692

rather structs passed by value.
This fixes PR5038.

llvm-svn: 82689

 - Apparently, I'm willing to do incredibly stupid things in the name of portability.

llvm-svn: 82685

unconditionally compute MMI even if the target doesn't support EH or Debug info, because the target may use it for other things, this fixes PR5036

llvm-svn: 82684

llvm-svn: 82683

LiveVariables add implicit kills to correctly track partial register kills. This works well enough and is fairly accurate. But coalescer can make it impossible to maintain these markers. e.g.

        BL <ga:sss1>, %R0<kill,undef>, %S0<kill>, %R0<imp-def>, %R1<imp-def,dead>, %R2<imp-def,dead>, %R3<imp-def,dead>, %R12<imp-def,dead>, %LR<imp-def,dead>, %D0<imp-def>, ...
...
	%reg1031<def> = FLDS <cp#1>, 0, 14, %reg0, Mem:LD4[ConstantPool]
...
   	%S0<def> = FCPYS %reg1031<kill>, 14, %reg0, %D0<imp-use,kill>

When reg1031 and S0 are coalesced, the copy (FCPYS) will be eliminated the the implicit-kill of D0 is lost. In this case it's possible to move the marker to the FLDS. But in many cases, this is not possible. Suppose

	%reg1031<def> = FOO <cp#1>, %D0<imp-def>
...
   	%S0<def> = FCPYS %reg1031<kill>, 14, %reg0, %D0<imp-use,kill>

When FCPYS goes away, the definition of S0 is the "FOO" instruction. However, transferring the D0 implicit-kill to FOO doesn't work since it is the def of D0 itself. We need to fix this in another time by introducing a "kill" pseudo instruction to track liveness.

Disabling the assertion is not ideal, but machine verifier is doing that job now. It's important to know double-def is not a miscomputation since it means a register should be free but it's not tracked as free. It's a performance issue instead.

llvm-svn: 82677

Clean up LiveVariables and change how it deals with partial updates and kills. This also eliminate the horrible check which scan forward to the end of the basic block. It should be faster and more accurate.

llvm-svn: 82676

a trivial unittest would have caught.  This revision also adds the trivial
unittest.

llvm-svn: 82675

computation, and some cosmetics.

llvm-svn: 82660

llvm-svn: 82658

llvm-svn: 82657

llvm-svn: 82656

llvm-svn: 82655

is also the name of their type, as declarations like "EVT EVT" look
really odd.

llvm-svn: 82654

llvm-svn: 82653

The machine code verifier did not check for explicit operands correctly. It
used MachineInstr::getNumExplicitOperands, but that method may cheat and use
the declared count in the TargetInstrDesc.

Now we check the explicit operands one at a time in visitMachineOperand.

llvm-svn: 82652

default implementation.  Update comment on the default version, which made it
sound like most targets override it.  Currently only X86 and SystemZ override
this method.

llvm-svn: 82651

llvm-svn: 82648

llvm-svn: 82647

This fixes PR5031. Unfortunately, there is no small testcase :(

llvm-svn: 82643

llvm-svn: 82641

llvm-svn: 82638

llvm-svn: 82637

llvm-svn: 82635

same effect that "host-only" used to have, but can be combined with other
targets.  host-only is still available as a synonym but no longer documented.

llvm-svn: 82634

Fix bug in kill flag updating for post-register-allocation scheduling. When the kill flag of a superreg needs to be cleared because there are one or more subregs live, we instead add implicit-defs of those subregs and leave the kill flag on the superreg. This allows us to end the live-range of the superreg without ending the live-ranges of the subregs.

llvm-svn: 82629