for fastcc from X86CallingConv.td.  This means that nested functions
are not supported for calling convention 'fastcc'.

llvm-svn: 42934

llvm-svn: 42922

enabled by passing -tailcallopt to llc.  The optimization is
performed if the following conditions are satisfied:
* caller/callee are fastcc
* elf/pic is disabled OR
  elf/pic enabled + callee is in module + callee has
  visibility protected or hidden

llvm-svn: 42870

llvm-svn: 42785

llvm-svn: 42656

llvm-svn: 42607

llvm-svn: 42579

seem significant as well.

llvm-svn: 42564

llvm-svn: 42554

llvm-svn: 42552

llvm-svn: 42547

llvm-svn: 42546

llvm-svn: 42347

llvm-svn: 41810

llvm-svn: 41808

llvm-svn: 41319

llvm-svn: 41178

llvm-svn: 41021

able to 3-addressify away stuff like this:

        movl    %ecx, %eax
        decl    %eax

llvm-svn: 41020

llvm-svn: 41013

Increase efficiency of sign_extend_inreg by using subregisters for truncation. As the README suggests sign_extend_subreg is selected to (sext(trunc)).

llvm-svn: 41010

llvm-svn: 41009

llvm-svn: 40772

llvm-svn: 40028

llvm-svn: 39998

llvm-svn: 39977

llvm-svn: 37239

llvm-svn: 36965

llvm-svn: 36799

llvm-svn: 36185

llvm-svn: 36028

llvm-svn: 35884

llvm-svn: 35867

llvm-svn: 35637

llvm-svn: 35634

llvm-svn: 35435

llvm-svn: 35241

llvm-svn: 35107

llvm-svn: 34837

llvm-svn: 34204