Add a PatFrag to match X86tcret using 6 fixed registers or less. This
avoids folding loads into TCRETURNmi64 using 7 or more volatile
registers.
<rdar://problem/12282281>
llvm-svn: 163819
We don't have enough GR64_TC registers when calling a varargs function
with 6 arguments. Since %al holds the number of vector registers used,
only %r11 is available as a scratch register.
This means that addressing modes using both base and index registers
can't be folded into TCRETURNmi64.
<rdar://problem/12282281>
llvm-svn: 163761
types, as well as int<->ptr casts. This allows us to tailcall functions
with some trivial casts between the call and return (i.e. because the
return types disagree).
llvm-svn: 157798
Evan Cheng