llvm-svn: 61715

Do not isel load folding bt instructions for pentium m, core, core2, and AMD processors. These are significantly slower than a load followed by a bt of a register.

llvm-svn: 61557

especially in the case of addresses computed from loop induction
variables.

llvm-svn: 61075

llvm-svn: 60609

being both a namespace and a variable name.

llvm-svn: 60208

llvm-svn: 56888

`-fno-builtin' flag. Currently, it's used to replace "memset" with "_bzero"
instead of "__bzero" on Darwin10+. This arguably violates the meaning of this
flag, but is currently sufficient. The meaning of this flag should become more
specific over time.

llvm-svn: 56885

llvm-svn: 50649

the code being generated does not require an executable stack.

Also, add target-specific code to make use of this on Linux
on x86. 

llvm-svn: 50634

llvm-svn: 49158

llvm-svn: 49129

llvm-svn: 49048

llvm-svn: 48691

llvm-svn: 47002

Before:
_main:
        subq    $8, %rsp
        leaq    _X(%rip), %rax
        movsd   8(%rax), %xmm1
        movss   _X(%rip), %xmm0
        call    _t
        xorl    %ecx, %ecx
        movl    %ecx, %eax
        addq    $8, %rsp
        ret
Now:
_main:
        subq    $8, %rsp
        movsd   _X+8(%rip), %xmm1
        movss   _X(%rip), %xmm0
        call    _t
        xorl    %ecx, %ecx
        movl    %ecx, %eax
        addq    $8, %rsp
        ret

Notice there is another idiotic codegen issue that needs to be fixed asap:
xorl    %ecx, %ecx
movl    %ecx, %eax

llvm-svn: 46850

llvm-svn: 46681

llvm-svn: 45494

llvm-svn: 45418

Now both subtarget define getMaxInlineSizeThreshold and the expansion uses it.

This should not change generated code.

llvm-svn: 43552

The x86-64 ABI states that objects passed on the stack have
8 byte alignment. Implement that.

llvm-svn: 41768

llvm-svn: 41700

This is mandated table 3.1 at
http://www.x86-64.org/documentation/abi.pdf

llvm-svn: 41642

llvm-svn: 40881

llvm-svn: 40878

llvm-svn: 40701

llvm-svn: 35869

llvm-svn: 33257

just use the one that's in the subtarget.

llvm-svn: 33255

* PIC-aware internal structures in X86 Codegen have been refactored
* Visibility (default/weak) has been added
* Docs fixes (external weak linkage, visibility, formatting)

llvm-svn: 33136

- New target type "mingw" was introduced
- Same things for both mingw & cygwin are marked as "cygming" (as in
gcc)
- .lcomm is supported here, so allow LLVM to use it
- Correctly use underscored versions of setjmp & _longjmp for both mingw
& cygwin

llvm-svn: 32833

type for distinguish JIT & non-JIT instead of "dirty" hacks :)

llvm-svn: 32745

platform should be more or less workable. At least, sim is running fine
under lli :)

llvm-svn: 32711

llvm-svn: 32048

llvm-svn: 31887

llvm-svn: 30985

llvm-svn: 30764

llvm-svn: 30763

DLL* linkages got full (I hope) codegeneration support in C & both x86
assembler backends.
External weak linkage added for future use, we don't provide any
codegeneration, etc. support for it.

llvm-svn: 30374

llvm-svn: 30177

llvm-svn: 30165