A*A*B + A*A*C   -->   A*(A*B+A*C)   -->   A*(A*(B+C))

This implements Reassociate/mul-factor3.ll

llvm-svn: 26757

llvm-svn: 26756

llvm-svn: 26755

llvm-svn: 26754

(x<<1)+(y<<1) -> (X+Y)<<1.  This implements
Transforms/Reassociate/shift-factor.ll

llvm-svn: 26753

llvm-svn: 26752

determine the top directory. This allows the tool to find the correct top
directory when you have something like:

   /x/llvm
   /x/llvm2
   /x/llvm3

Previously the scripts would always find /x/llvm even if you were in the
llvm2 or llvm3 directory because the pattern didn't allow the digits at
the end of the path.

llvm-svn: 26751

llvm-svn: 26750

llvm-svn: 26749

llvm-svn: 26748

llvm-svn: 26747

llvm-svn: 26746

2. Remove the declaration of llvm.dbg.declare.

llvm-svn: 26745

llvm-svn: 26744

llvm-svn: 26743

llvm-svn: 26742

llvm-svn: 26741

llvm-svn: 26740

llvm-svn: 26739

transformation decisions.

llvm-svn: 26738

llvm-svn: 26737

llvm-svn: 26736

llvm-svn: 26735

llvm-svn: 26734

registers, and update it on entry to each function, then restore it on exit.

This compiles:

void func(vfloat *a, vfloat *b, vfloat *c) {
        *a = *b * *c + *c;
}

to this:

_func:
        mfspr r2, 256
        oris r6, r2, 49152
        mtspr 256, r6
        lvx v0, 0, r5
        lvx v1, 0, r4
        vmaddfp v0, v1, v0, v0
        stvx v0, 0, r3
        mtspr 256, r2
        blr

GCC produces this (which has additional stack accesses):

_func:
        mfspr r0,256
        stw r0,-4(r1)
        oris r0,r0,0xc000
        mtspr 256,r0
        lvx v0,0,r5
        lvx v1,0,r4
        lwz r12,-4(r1)
        vmaddfp v0,v0,v1,v0
        stvx v0,0,r3
        mtspr 256,r12
        blr

llvm-svn: 26733

llvm-svn: 26732

llvm-svn: 26731

$(Echo) instead of @echo

llvm-svn: 26730

llvm-svn: 26729

llvm-svn: 26728

Regression/CodeGen/PowerPC/and_add.ll

a case that occurs with dynamic allocas of constant size.

llvm-svn: 26727

llvm-svn: 26726

llvm-svn: 26725

llvm-svn: 26724

a select and FABS/FNEG.

This speeds up a trivial (aka stupid) copysign benchmark I wrote from 6.73s
to 2.64s, woo.

llvm-svn: 26723

llvm-svn: 26722

llvm-svn: 26721

llvm-svn: 26720

1. Use flags on the instructions in the .td file to indicate the PPC970 unit
   type instead of a table in the .cpp file.  Much cleaner.
2. Change the hazard recognizer to build d-groups according to the actual
   algorithm used, not my flawed understanding of it.
3. Model "must be in the first slot" and "must be the only instr in a group"
   accurately.

llvm-svn: 26719

to be emitted.

Don't add one to the latency of a completed instruction if the latency of the
op is 0.

llvm-svn: 26718