Strip out and simplify some code.  This also fixes the regression last
night compiling cfrac.  It did not realize that code like this:

int G; int *H = &G;

takes the address of G.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14973 91177308-0d34-0410-b5e6-96231b3b80d8

Minor cleanup, no functionality change

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14972 91177308-0d34-0410-b5e6-96231b3b80d8

Fix infinite loop

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14971 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
Updated to remove references to ConstantPointerRef and reflect the change
in the inheritance hierarchy: GlobalValue now derives from Constant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14969 91177308-0d34-0410-b5e6-96231b3b80d8

Remove an if statement that would never be reached.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14968 91177308-0d34-0410-b5e6-96231b3b80d8

Delete a redundant if branch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14967 91177308-0d34-0410-b5e6-96231b3b80d8

Expand the coercion of constants to include the newly constant Globals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14966 91177308-0d34-0410-b5e6-96231b3b80d8

Delete a no-op loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14965 91177308-0d34-0410-b5e6-96231b3b80d8

Expand the scope to include global values because they are now constants
too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14964 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid an unnecessary isa<Constant>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14963 91177308-0d34-0410-b5e6-96231b3b80d8

Fix infinite loop gccld'ing povray

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14962 91177308-0d34-0410-b5e6-96231b3b80d8

CPR Fixes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14961 91177308-0d34-0410-b5e6-96231b3b80d8

CPR fixes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14960 91177308-0d34-0410-b5e6-96231b3b80d8

Bug 122 fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14959 91177308-0d34-0410-b5e6-96231b3b80d8

Remove useless statistic, fix some slightly broken logic

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14958 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a rather serious bug in previous checkin

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14957 91177308-0d34-0410-b5e6-96231b3b80d8

Shrink some code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14956 91177308-0d34-0410-b5e6-96231b3b80d8

Add a missing space to align comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14955 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typeos in comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14954 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14953 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Minimize redundant isa<GlobalValue> usage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14952 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14951 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14950 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14949 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Minimize redundant isa<GlobalValue> usage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14948 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14947 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14946 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Rename methods to get ride of ConstantPointerRef usage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14945 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Excise dead CPR procesing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14944 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Correct test ordering for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14943 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14942 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Correct ordering of tests because for GlobalValue isa Constant

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14941 91177308-0d34-0410-b5e6-96231b3b80d8

User ValueListTy as the type of the ValueList. This avoides the ValueList
from being treated like a Function which can cause the contents of the list
to be come invalidated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14940 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14939 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Update for BytecodeHandler interface change resuing from CPRs going away

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14938 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
- Remove tabs
- Fix coments refering to ConstantPointerRef

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14937 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Move these functions from other places
- Provide implementations of Constant class overrides in GlobalValue

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14936 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Replace tabs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14935 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Correct an assert to not have redundant isa<GlobalValue>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14934 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14933 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Correct isa<Constant> for GlobalValue subclass
- Fix some tabs and indentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14932 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Module doesn't need to manage ConstantPointerRefs any more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14931 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14930 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Move GlobalValue and GlobalVariable implementations to Globals.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14929 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
- Delete ConstantPointerRef member function implementations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14928 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14927 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
remove redundant isa<GlobalValue>
ensure isa<GlobalValue> case is processed before is<Constant>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14926 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- Add ValueListTy to TypeTy so that the bcreader can have its own User
  category that won't get factored into any optimizations or cleanup.
- Correct an isa_impl to correctly include GlobalValue now that it isa
  Constant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14925 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
Remove redundancy in User::classof(Value*); GlobalValue isa Constant now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14924 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14923 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
We don't need to keep track of CPRs any more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14922 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
Now that GlobalVariable is a constant (via derivation from GlobalValue),
override the replaceUsesOfWithOnConstant method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14921 91177308-0d34-0410-b5e6-96231b3b80d8

bug 122:
- derive from Constant
- declare needed overrides from Constant class

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14920 91177308-0d34-0410-b5e6-96231b3b80d8

****** ABOLISH ConstantPointerRef *****

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14919 91177308-0d34-0410-b5e6-96231b3b80d8

Extend constructor so that it can support GlobalValue's (with names).
Make GlobalValue a "classof" Constant
Fix the classof(Value*) to include GlobalValue's

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14918 91177308-0d34-0410-b5e6-96231b3b80d8

Constant value not needed after CPR's disappear.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14917 91177308-0d34-0410-b5e6-96231b3b80d8

It looks like physref->virtreg joining is working fine.  Enable it by default
but make virtreg->virtreg joining stay off by default

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14916 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure to emit the immediate byte for instructions like:
shrd [mem], reg, imm

This fixes the jit-ls failure on 186.crafty.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14914 91177308-0d34-0410-b5e6-96231b3b80d8

Reserve the correct amt of space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14913 91177308-0d34-0410-b5e6-96231b3b80d8

Hrm, I think we need a "Reid is buggy" bug  ;-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14912 91177308-0d34-0410-b5e6-96231b3b80d8

We don't really need to #include IPO.h into this file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14911 91177308-0d34-0410-b5e6-96231b3b80d8

Initial (outline only) draft of the System Library requirements, design
and details documentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14910 91177308-0d34-0410-b5e6-96231b3b80d8

Added a README to point users to the documentation on the design of this
library which is a prerequisite for maintaining the library.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14909 91177308-0d34-0410-b5e6-96231b3b80d8

Fix incorrect computation of mod/ref sets.  Do not ask for mod/ref information
for objects of size 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14908 91177308-0d34-0410-b5e6-96231b3b80d8

Print modref information in a useful way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14907 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanups: fold two loops into one
New features: -print-all-alias-modref-info option, print more info

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14906 91177308-0d34-0410-b5e6-96231b3b80d8

link.h causes problems on some platforms and is not needed on solaris, where
the comment came from.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14905 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead file

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14904 91177308-0d34-0410-b5e6-96231b3b80d8

Add note about IA64 C++

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14903 91177308-0d34-0410-b5e6-96231b3b80d8

Fix warning on 64-bit machines

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14902 91177308-0d34-0410-b5e6-96231b3b80d8

* Use LI(S) to copy constants into registers intead of ADDI(S) as the latter is
  a funky way to "use" R0 for a 0-valued operand
* Add IMPLICIT_DEFs for incoming function arguments via registers to help the
  register allocator not clobber those registers
* Implement comparisons with longs
* Teach emitSelectOperation() to fold the SetCC operation

Patch contributed by Nate Begeman

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14901 91177308-0d34-0410-b5e6-96231b3b80d8

* Store all non-volatile int registers R13-31 on the stack, restore on exit
* Fix comment formatting

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14900 91177308-0d34-0410-b5e6-96231b3b80d8

Fix code formatting

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14899 91177308-0d34-0410-b5e6-96231b3b80d8

Implement PowerPCInstrInfo::isMoveInstr(), patch by Nate Begeman

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14898 91177308-0d34-0410-b5e6-96231b3b80d8

Add prototype for TargetInstrInfo::isMoveInstr()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14897 91177308-0d34-0410-b5e6-96231b3b80d8

* Enable allocation of registers r2-r10
* Allocate registers 13-31 backwards (to be able to store them all at once)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14896 91177308-0d34-0410-b5e6-96231b3b80d8

Add IMPLICIT_DEFS pseudo-instruction; patch by: Nate Begeman

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14895 91177308-0d34-0410-b5e6-96231b3b80d8

The generated instruction selector isn't (yet) functional

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14894 91177308-0d34-0410-b5e6-96231b3b80d8

* Output non-lazy linking stubs for external global variables
* Get rid of dead and #if 0'd code
* Minor for loop speed-up: save end iterator instead of querying every time

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14893 91177308-0d34-0410-b5e6-96231b3b80d8

Correctly build shared objects on MacOS X for debugging code generators

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14892 91177308-0d34-0410-b5e6-96231b3b80d8

Define double alignment as 8 bytes now that assert(DoubleAlignment == PointerSize)
has been eliminated

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14891 91177308-0d34-0410-b5e6-96231b3b80d8

* Add spaces between words and numbers in comments printed out for longs/floats
* Print out IMPLICIT_DEFS as comments in the assembly, patch by Nate Begeman

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14890 91177308-0d34-0410-b5e6-96231b3b80d8

Fix grammar.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14888 91177308-0d34-0410-b5e6-96231b3b80d8

Add convinience constructor for function calls with two args.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14885 91177308-0d34-0410-b5e6-96231b3b80d8

Add a class for pseudo-instructions. Use it.
Add IMPLICIT_USE and IMPLICIT_DEF, a la X86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14884 91177308-0d34-0410-b5e6-96231b3b80d8

Add what will eventually be the TSFlags. Big switch(opcode) statements are bad.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14883 91177308-0d34-0410-b5e6-96231b3b80d8

Add special handling for pseudo-instructions (print them as comments).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14882 91177308-0d34-0410-b5e6-96231b3b80d8

Add to-do list.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14881 91177308-0d34-0410-b5e6-96231b3b80d8

Do IMPLICIT_DEFs on incoming args' hard regs, to avoid confusing the regalloc.
Support single-fp incoming args.
Support single-fp outgoing args ('call' operands).
Support double-fp return values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14880 91177308-0d34-0410-b5e6-96231b3b80d8

The powerpc is now gone.  However it is now just known as the Skeleton target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14877 91177308-0d34-0410-b5e6-96231b3b80d8

Build skeleton target

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14876 91177308-0d34-0410-b5e6-96231b3b80d8

Build the skeleton target

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14875 91177308-0d34-0410-b5e6-96231b3b80d8

Initial checkin of the rest of the skeleton target

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14874 91177308-0d34-0410-b5e6-96231b3b80d8

Initial skeleton tablegen files

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14873 91177308-0d34-0410-b5e6-96231b3b80d8

Add skeleton makefile

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14872 91177308-0d34-0410-b5e6-96231b3b80d8

Initial readme

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14871 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the regressions handling unnamed global variables

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14870 91177308-0d34-0410-b5e6-96231b3b80d8

For 64-bit platform support, we now use the clEnumValEnd macro to terminate
cl::values lists

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14869 91177308-0d34-0410-b5e6-96231b3b80d8

IA64 compat

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14867 91177308-0d34-0410-b5e6-96231b3b80d8

Fix IA64 compatibility

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14866 91177308-0d34-0410-b5e6-96231b3b80d8