Also, change MDString to use a StringRef.

llvm-svn: 77098

an enum.

llvm-svn: 77096

values.  Hopefully this fixes PR4622.

llvm-svn: 77088

1. Spell SectionFlags::Writeable as "Writable".
2. Add predicates for deriving SectionFlags from SectionKinds.
3. Sink ELF-specific getSectionPrefixForUniqueGlobal impl into
   ELFTargetAsmInfo.
4. Fix SectionFlagsForGlobal to know that BSS/ThreadBSS has the
   BSS bit set (the real fix for PR4619).
5. Fix isSuitableForBSS to not put globals with explicit sections
   set in BSS (which was the reason #4 wasn't fixed earlier).
6. Remove my previous hack for PR4619.

llvm-svn: 77085

llvm-svn: 77084

Thanks to Rafael for the great example.

llvm-svn: 77083

llvm-svn: 77080

the step value as unsigned, the start value and the addrec
itself still need to be treated as signed.

llvm-svn: 77078

llvm-svn: 77065

 - Instead of requiring targets to define a JIT quality match function, we just
   have them specify if they support a JIT.

 - Target selection for the JIT just gets the host triple and looks for the best
   target which matches the triple and has a JIT.

llvm-svn: 77060

Mark attributes of return insn correctly. It was being assumed safe to delete in isSafeToDelete (a thing checked-in 76281).

llvm-svn: 77056

 - Less boilerplate == good.

llvm-svn: 77052

llvm-svn: 77051

 - The only meat here is in Value.{h,cpp} the rest is essential 'const
   std::string &' -> 'const Twine &'.

llvm-svn: 77048

llvm-svn: 77045

llvm-svn: 77044

llvm-svn: 77041

llvm-svn: 77039

llvm-svn: 77035

analyzing add recurrences.

llvm-svn: 77034

llvm-svn: 77033

affected after a PHI node has been analyzed, just remove affected
SCEVs from the Scalars map, so that they'll be (lazily) recreated as
needed. This avoids creating SCEV objects that aren't actually needed.

Also, rewrite the associated def-use walking code to be non-recursive
and to continue traversing past Instructions that don't have an
entry in the Scalars map.

llvm-svn: 77032

getAnalysisIfAvailable<TargetData>().

llvm-svn: 77028

llvm-svn: 77026

Before:
      adr r12, #LJTI3_0_0
      ldr pc, [r12, +r0, lsl #2]
LJTI3_0_0:
      .long    LBB3_24
      .long    LBB3_30
      .long    LBB3_31
      .long    LBB3_32

After:
      adr r12, #LJTI3_0_0
      add pc, r12, +r0, lsl #2
LJTI3_0_0:
      b.w    LBB3_24
      b.w    LBB3_30
      b.w    LBB3_31
      b.w    LBB3_32

This has several advantages.
1. This will make it easier to optimize this to a TBB / TBH instruction +
   (smaller) table.
2. This eliminate the need for ugly asm printer hack to force the address
   into thumb addresses (bit 0 is one).
3. Same codegen for pic and non-pic.
4. This eliminate the need to align the table so constantpool island pass
   won't have to over-estimate the size.

Based on my calculation, the later is probably slightly faster as well since
ldr pc with shifter address is very slow. That is, it should be a win as long
as the HW implementation can do a reasonable job of branch predict the second
branch.

llvm-svn: 77024

 - Some clients which used DOUT have moved to DEBUG. We are deprecating the
   "magic" DOUT behavior which avoided calling printing functions when the
   statement was disabled. In addition to being unnecessary magic, it had the
   downside of leaving code in -Asserts builds, and of hiding potentially
   unnecessary computations.

llvm-svn: 77019

llvm-svn: 77018

llvm-svn: 77016

llvm-svn: 77015

llvm-svn: 77014

Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types.  More to come.

llvm-svn: 77011

llvm-svn: 77009

There's still a strict-aliasing violation here, but I don't feel like 
dealing with that right now...

llvm-svn: 77005

llvm-svn: 77004

llvm-svn: 76999

previously virtual) function to being a static function
in the .cpp file.

llvm-svn: 76997

Disable my constant island pass optimization (to make use soimm more effectively). It caused infinite looping on lencod.

llvm-svn: 76995

It's classifications now include elf-specific discriminators.  Targets
that don't have these features (like darwin and pecoff) simply treat
data.rel like data, etc.

llvm-svn: 76993

Add a workaround for Darwin assembler bug where it's not setting the thumb bit in Thumb2 jumptable entries. We now pass Olden.

llvm-svn: 76991

pass it in instead of recomputing it.

llvm-svn: 76990