again in the future, it can be resurrected out of CVS

llvm-svn: 15112

llvm-svn: 15111

* Don't allow negative immediates to users of unsigned immediates
* Fix long compares
* Support <const int>, op as a potential immediate candidate
* Fix sign extension of short and byte loads
* Fix and improve integer casts
* Fix passing of doubles as vararg functions

Patch contributed by Nate Begeman.

llvm-svn: 15109

llvm-svn: 15108

llvm-svn: 15107

intervals need not be sorted anymore. Removing this redundant step
improves LiveIntervals running time by 5% on 176.gcc.

llvm-svn: 15106

llvm-svn: 15105

compilation of gcc:

* Use vectors instead of lists for the intervals sets
* Use a heap for the unhandled set to keep intervals always sorted and
  makes insertions back to the heap very fast (compared to scanning a
  list)

llvm-svn: 15103

can be improved in many ways.  But: stop laughing, even with -basicaa it
deletes 15% of the stores in 252.eon :)

llvm-svn: 15101

llvm-svn: 15099

llvm-svn: 15098

to the field being updated.  Patch contributed by Tobias Nurmiranta

llvm-svn: 15097

llvm-svn: 15096

the end will reduce erase() runtimes.

llvm-svn: 15093

fortunately, they are easy to handle if we know about them.  This patch fixes
some serious pessimization of code produced by the linscan register allocator.

llvm-svn: 15092

llvm-svn: 15091

        mov %EDI, 12
        add %EDI, %ECX
        mov %ECX, 12
        add %ECX, %EDX
        mov %EDX, 12
        add %EDX, %ESI

instead (really!) generate this:

        add %ECX, 12
        add %EDX, 12
        add %ESI, 12

llvm-svn: 15090

llvm-svn: 15089

* Fix opcode RLWNM -> RLWINM since it uses an immediate const shift value

llvm-svn: 15087

  dyn_cast<>ing and checking Constant's value
* Convert tabs to spaces

llvm-svn: 15086

* Test for whether bits are shifted out during the optzn.

If so, the fold is illegal, though it can be handled explicitly for setne/seteq

This fixes the miscompilation of 254.gap last night, which was a latent bug
exposed by other optimizer improvements.

llvm-svn: 15085

* Fix printing of `zeroinitializer'
* Fix printing of `linkonce' globals, complete with stubs

llvm-svn: 15084

* Generation of opcodes that take 16 bit immediates
* Rewrote multiply to be correct for 64 bit values
* Rewrote all the long handling to be correct for PowerPC
* Fix visitSelectInst() to define the upper register of the pair of regs
  representing a long value

Patch contributed by Nate Begeman.

llvm-svn: 15083

"simplify" a bit of code for comparison/and folding

llvm-svn: 15082

llvm-svn: 15081

llvm-svn: 15078

llvm-svn: 15077

llvm-svn: 15073

compile time for 176.gcc from 5.6 secs to 4.7 secs.

llvm-svn: 15072

llvm-svn: 15069

llvm-svn: 15068

llvm-svn: 15067

llvm-svn: 15066

an insertion or not (because the pointer set already existed).

llvm-svn: 15064

the appopriate size.  This gives us the ability to eliminate int -> ptr -> int

llvm-svn: 15063

to miscompile the SingleSource/Regression/C++/pointer_member.cpp program.

llvm-svn: 15062

llvm-svn: 15058

printf("%a") support.
Patch contributed by Bill Wendling.

llvm-svn: 15056

Patch contributed by Bill Wendling.

llvm-svn: 15050

llvm-svn: 15048