is to manage processor specific attributes from the command line.  See examples
of use in llc/lli and PowerPCTargetSubtarget.

llvm-svn: 23191

directly out of R1 (without using a CopyFromReg, which uses a chain), multiple
allocas were getting CSE'd together, producing bogus code.  For this:

int %foo(bool %X, int %A, int %B) {
        br bool %X, label %T, label %F
F:
        %G = alloca int
        %H = alloca int
        store int %A, int* %G
        store int %B, int* %H
        %R = load int* %G
        ret int %R
T:
        ret int 0
}

We were generating:

_foo:
        stwu r1, -16(r1)
        stw r31, 4(r1)
        or r31, r1, r1
        stw r1, 12(r31)
        cmpwi cr0, r3, 0
        bne cr0, .LBB_foo_2     ; T
.LBB_foo_1:     ; F
        li r2, 16
        subf r2, r2, r1   ;; One alloca
        or r1, r2, r2
        or r3, r1, r1
        or r1, r2, r2
        or r2, r1, r1
        stw r4, 0(r3)
        stw r5, 0(r2)
        lwz r3, 0(r3)
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr
.LBB_foo_2:     ; T
        li r3, 0
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr

Now we generate:

_foo:
        stwu r1, -16(r1)
        stw r31, 4(r1)
        or r31, r1, r1
        stw r1, 12(r31)
        cmpwi cr0, r3, 0
        bne cr0, .LBB_foo_2     ; T
.LBB_foo_1:     ; F
        or r2, r1, r1
        li r3, 16
        subf r2, r3, r2  ;; Alloca 1
        or r1, r2, r2
        or r2, r1, r1
        or r6, r1, r1
        subf r3, r3, r6  ;; Alloca 2
        or r1, r3, r3
        or r3, r1, r1
        stw r4, 0(r2)
        stw r5, 0(r3)
        lwz r3, 0(r2)
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr
.LBB_foo_2:     ; T
        li r3, 0
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr

This fixes Povray and SPASS with the dag isel, the last two failing cases.
Tommorow we will hopefully turn it on by default! :)

llvm-svn: 23190

could cause a miscompile.  Fixing this didn't fix the two programs that fail
though.  :(

This also changes the implementation to follow the pattern selector more
closely, causing us to select 0 to li instead of lis.

llvm-svn: 23189

and selecting early prevents folding immediates into the cmpw* instructions

llvm-svn: 23188

getting them out of the business of making stack slots.

llvm-svn: 23180

llvm-svn: 23179

llvm-svn: 23178

llvm-svn: 23177

the ops to dag optimization.

llvm-svn: 23176

llvm-svn: 23171

llvm-svn: 23170

llvm-svn: 23168

fixes crafty and probably others.

llvm-svn: 23167

ugly hacks

llvm-svn: 23162

llvm-svn: 23159

Remove code (last hunk) that miscompiled immediate and's, such as
  and uint %tmp.30, 4294958079

into

 andi. r8, r8, 56319
 andis. r8, r8, 65535

instead of:

 li r9, -9217
 and r8, r8, r9

The first always generates zero.

This fixes espresso.

llvm-svn: 23155

fixes fourinarow

llvm-svn: 23153

fixes fhourstones

llvm-svn: 23152

llvm-svn: 23150

linking them to calls when appropriate, this prevents the scheduler from
pulling these copies away from the call.

This fixes Ptrdist/yacr2

llvm-svn: 23143

fixes MediaBench/toast with the dag selector

llvm-svn: 23141

which I failed to include when I moved the code over.  This fixes
MallocBench/gs.

llvm-svn: 23140

STOREs, know the right type to store.

llvm-svn: 23139

no xcode, this is not right:

   if (!foo) break;
     X;

llvm-svn: 23138

llvm-svn: 23137

llvm-svn: 23136

This fixes voronoi and bh in Olden, allowing all of olden to pass!

llvm-svn: 23133

llvm-svn: 23127

llvm-svn: 23126

Olden/msFix order of operands for copytoreg node when emitting calls.  This fixes
Olden/mstt.

llvm-svn: 23125

llvm-svn: 23123

llvm-svn: 23121

llvm-svn: 23120

llvm-svn: 23119

them more clearly.

llvm-svn: 23118

This fixes: UnitTests/2005-07-17-INT-To-FP.c

llvm-svn: 23112

llvm-svn: 23111

llvm-svn: 23107

llvm-svn: 23106

llvm-svn: 23105