llvm-svn: 30161

using test, which provides nice simplifications like:

-       movl %edi, %ecx
-       andl $2, %ecx
-       cmpl $0, %ecx
+       testl $2, %edi
        je LBB1_11      #cond_next90

There are a couple of dagiselemitter deficiencies that this exposes, they will
be handled later.

llvm-svn: 30156

llvm-svn: 30155

llvm-svn: 30152

llvm-svn: 30146

llvm-svn: 30140

llvm-svn: 30135

llvm-svn: 30134

llvm-svn: 30131

llvm-svn: 30127

llvm-svn: 30126

llvm-svn: 30125

llvm-svn: 30121

llvm-svn: 30113

llvm-svn: 30112

adds assertions that check to make sure every operand gets emitted.

llvm-svn: 30110

def operand or a use operand.

llvm-svn: 30109

actually *removes* one of the operands, instead of just assigning both operands
the same register.  This make reasoning about instructions unnecessarily complex,
because you need to know if you are before or after register allocation to match
up operand #'s with the target description file.

Changing this also gets rid of a bunch of hacky code in various places.

This patch also includes changes to fold loads into cmp/test instructions in
the X86 backend, along with a significant simplification to the X86 spill
folding code.

llvm-svn: 30108

llvm-svn: 30107

llvm-svn: 30103

llvm-svn: 30102

Call these from your backend to enjoy setjmp/longjmp goodness, see
lib/Target/IA64/IA64ISelLowering.cpp for an example

llvm-svn: 30095

This pass:

1. Splits TargetMachine into TargetMachine (generic targets, can be implemented
any way, like the CBE) and LLVMTargetMachine (subclass of TM that is used by
things using libcodegen and other support).
2. Instead of having each target fully populate the passmgr for file or JIT
   output, move all this to common code, and give targets hooks they can
   implement.
3. Commonalize the target population stuff between file emission and JIT
   emission.
4. All (native code) codegen stuff now happens in a FunctionPassManager, which
   paves the way for "fast -O0" stuff in the CFE later, and now LLC could
   lazily stream .bc files from disk to use less memory.
5. There are now many fewer #includes and the targets don't depend on the
   scalar xforms or libanalysis anymore (but codegen does).
6. Changing common code generator pass ordering stuff no longer requires
   touching all targets.
7. The JIT now has the option of "-fast" codegen or normal optimized codegen,
   which is now orthogonal to the fact that JIT'ing is being done.

llvm-svn: 30081

llvm-svn: 30080

llvm-svn: 30078

llvm-svn: 30070

llvm-svn: 30067

llvm-svn: 30056

Suppose the TokenFactor can reach the Op:

       [Load chain]
           ^
           |
         [Load]
         ^    ^
         |    |
        /      \-
       /         |
      /          [Op]
     /          ^ ^
     |        ..  |
     |       /    |
   [TokenFactor]  |
       ^          |
       |          |
        \        /
         \      /
         [Store]

If we move the Load below the TokenFactor, we would have created a cycle in
the DAG.

llvm-svn: 30040

llvm-svn: 30039

llvm-svn: 30038

llvm-svn: 29965

llvm-svn: 29962

or vector result. X86 does not have load/mod/store variants of those
instructions.

llvm-svn: 29957

- Also disable isel load folding if -fast.

llvm-svn: 29956

handling.)

llvm-svn: 29954

llvm-svn: 29953

llvm-svn: 29952

there are clearly some encoding bugs lurking in there somewhere.

llvm-svn: 29949

llvm-svn: 29946