llvm-svn: 17752

llvm-svn: 17751

llvm-svn: 17750

llvm-svn: 17749

llvm-svn: 17748

llvm-svn: 17747

value.  This allows us to turn more globals into constants and eliminate them.
This patch implements GlobalOpt/load-store-global.llx.

Note that this patch speeds up 255.vortex from:

Output/255.vortex.out-cbe.time:program 7.640000
Output/255.vortex.out-llc.time:program 9.810000

to:

Output/255.vortex.out-cbe.time:program 7.250000
Output/255.vortex.out-llc.time:program 9.490000

Which isn't bad at all!

llvm-svn: 17746

llvm-svn: 17745

llvm-svn: 17744

llvm-svn: 17743

llvm-svn: 17742

If this happens, detect it early instead of relying on instcombine to notice
it later.  This can be a big speedup, because PHI nodes can have many
incoming values.

llvm-svn: 17741

This exposes subsequent optimization possiblities and reduces code size.
This triggers 1423 times in spec.

llvm-svn: 17740

Note that this reduces code size anyway (as well as making further
optimizations simpler) so it's always a win.

llvm-svn: 17739

llvm-svn: 17738

llvm-svn: 17737

  %X = alloca ...
  %Y = alloca ...
    X == Y

into false.  This allows us to simplify some stuff in eon (and probably
many other C++ programs) where operator= was checking for self assignment.
Folding this allows us to SROA several additional structs.

llvm-svn: 17735

llvm-svn: 17734

llvm-svn: 17733

Exclude bigfib, so that we effectively exclude all C++ benchmarks.
Update to-do list: mention va_start.

llvm-svn: 17732

llvm-svn: 17731

constant value.  This makes the return value dead and allows for
simplification in the caller.

This implements IPConstantProp/return-constant.ll

This triggers several dozen times throughout SPEC.

llvm-svn: 17730

llvm-svn: 17729

not zero.

llvm-svn: 17728

of the array is just two.  This occurs 8 times in gcc, 6 times in crafty, and
12 times in 099.go.

This implements ScalarRepl/sroa_two.ll

llvm-svn: 17727

llvm-svn: 17726

llvm-svn: 17725

llvm-svn: 17724

llvm-svn: 17723

llvm-svn: 17722

llvm-svn: 17721

setting path to prcontext.tcl script. Right now it searches for tclsh in your path, but this should be obtained from configure.

llvm-svn: 17720

llvm-svn: 17719

argument pointers.  This is only valid to do if the function already
unconditionally loaded an argument or if the pointer passed in is known
to be valid.  Make sure to do the required checks.

This fixed ArgumentPromotion/control-flow.ll and the Burg program.

llvm-svn: 17718

llvm-svn: 17717

llvm-svn: 17716

llvm-svn: 17715

llvm-svn: 17714

llvm-svn: 17713

Adding subdirectory dg.exp files in order to be able to use dejagnu to only run specific tests (located in some subdirectory of Regression)

llvm-svn: 17712