llvm-svn: 51661

instruction to execute. This can be used for transformations (like two-address
conversion) to remat an instruction instead of generating a "move"
instruction. The idea is to decrease the live ranges and register pressure and
all that jazz.

llvm-svn: 51660

that it's safe to remat an instruction.

llvm-svn: 51659

llvm-svn: 51658

Factor the numbering computation into a separate method, and add the slightest attempt at some renumbering logic, which is currently unused.

llvm-svn: 51652

llvm-svn: 51648

llvm-svn: 51647

llvm-svn: 51644

llvm-svn: 51636

llvm-svn: 51635

llvm-svn: 51634

on ia64.

llvm-svn: 51633

llvm-svn: 51632

llvm-svn: 51631

llvm-svn: 51630

is a memory location

llvm-svn: 51626

code generator would do something like this:

f64 = load f32 <anyext>, f32mem
v2f64 = insertelt undef, %0, 0
v2f64 = insertelt %1, 0.0, 1

into 

v2f64 = vzext_load f32mem

which on x86 is movsd, when you really wanted a cvtss2sd/movsd pair.

llvm-svn: 51624

llvm-svn: 51613

the first visited edge.

llvm-svn: 51612

before deleting the instruction.

llvm-svn: 51609

llvm-svn: 51606

back out last commit: The .cpp file for a module should include its corresponding header first, even if redundant.

llvm-svn: 51598

llvm-svn: 51591

llvm-svn: 51590

llvm-svn: 51589

llvm-svn: 51588

the set of nodes. Fix makeEqual to handle this by creating the new node first
then iterating across them second.

llvm-svn: 51573

llvm-svn: 51572

llvm-svn: 51570

the section or the visibility from one global
value to another: copyAttributesFrom.  This is
particularly useful for duplicating functions:
previously this was done by explicitly copying
each attribute in turn at each place where a
new function was created out of an old one, with
the result that obscure attributes were regularly
forgotten (like the collector or the section).
Hopefully now everything is uniform and nothing
is forgotten.

llvm-svn: 51567

llvm-svn: 51565

Running /Users/void/llvm/llvm.src/test/CodeGen/X86/dg.exp ...
FAIL: /Users/void/llvm/llvm.src/test/CodeGen/X86/2007-11-30-LoadFolding-Bug.ll
Failed with exit(1) at line 1
while running: llvm-as < /Users/void/llvm/llvm.src/test/CodeGen/X86/2007-11-30-LoadFolding-Bug.ll | llc -march=x86 -mattr=+sse2 -stats |&  grep {1 .*folded into instructions}
child process exited abnormally

Make this conditional for now.

llvm-svn: 51563

LBB1_3:   # bb
...
        xorl    %ebp, %ebp
        subl    (%ebx), %ebp
...
        incl    %ecx
        cmpl    %edi, %ecx
        jl      LBB1_3  # bb

Whe using machine LICM, LLVM converts it into:

        xorl %esi, %esi
LBB1_3: # bb
...
        movl    %esi, %ebp
        subl    (%ebx), %ebp
...
        incl    %ecx
        cmpl    %edi, %ecx
        jl      LBB1_3  # bb

Two address conversion inserts the copy instruction. However, it's cheaper to
rematerialize it, and remat helps reduce register pressure.

llvm-svn: 51562

llvm-svn: 51560

Analysis/ConstantFolding to fold ConstantExpr's, then make instcombine use it
to try to use targetdata to fold constant expressions on void instructions.

Also extend the icmp(inttoptr, inttoptr) folding to handle the case where
int size != ptr size.

llvm-svn: 51559

Patch by Mikael Lepistö.

llvm-svn: 51540

llvm-svn: 51538

This fixes PR2359

llvm-svn: 51536

llvm-svn: 51535

llvm-svn: 51533