but make virtreg->virtreg joining stay off by default

llvm-svn: 14916

shrd [mem], reg, imm

This fixes the jit-ls failure on 186.crafty.

llvm-svn: 14914

llvm-svn: 14913

llvm-svn: 14911

for objects of size 0.

llvm-svn: 14908

llvm-svn: 14907

New features: -print-all-alias-modref-info option, print more info

llvm-svn: 14906

  a funky way to "use" R0 for a 0-valued operand
* Add IMPLICIT_DEFs for incoming function arguments via registers to help the
  register allocator not clobber those registers
* Implement comparisons with longs
* Teach emitSelectOperation() to fold the SetCC operation

Patch contributed by Nate Begeman

llvm-svn: 14901

* Fix comment formatting

llvm-svn: 14900

llvm-svn: 14899

llvm-svn: 14898

llvm-svn: 14897

* Allocate registers 13-31 backwards (to be able to store them all at once)

llvm-svn: 14896

llvm-svn: 14895

llvm-svn: 14894

* Get rid of dead and #if 0'd code
* Minor for loop speed-up: save end iterator instead of querying every time

llvm-svn: 14893

llvm-svn: 14892

has been eliminated

llvm-svn: 14891

* Print out IMPLICIT_DEFS as comments in the assembly, patch by Nate Begeman

llvm-svn: 14890

llvm-svn: 14888

llvm-svn: 14885

Add IMPLICIT_USE and IMPLICIT_DEF, a la X86.

llvm-svn: 14884

llvm-svn: 14883

llvm-svn: 14882

llvm-svn: 14881

Support single-fp incoming args.
Support single-fp outgoing args ('call' operands).
Support double-fp return values.

llvm-svn: 14880

llvm-svn: 14877

llvm-svn: 14875

llvm-svn: 14874

llvm-svn: 14873

llvm-svn: 14872

llvm-svn: 14871

llvm-svn: 14870

llvm-svn: 14867

llvm-svn: 14866

llvm-svn: 14865

llvm-svn: 14864

Speed up SCCP substantially by processing overdefined values quickly.  This
patch speeds up SCCP by about 30-40% on large testcases.

llvm-svn: 14861

This version takes about 1s longer than the previous one (down to 2.35s),
but on the positive side, it actually works :)

llvm-svn: 14856

llvm-svn: 14854