ByVal arguments are passed on stack. Make sure to allocate a slot using size and alignment information on the parameter attribute.

llvm-svn: 45897

llvm-svn: 45419

in favour of teaching CCAssignToStack that size 0 and/or align
0 means to use the ABI values.  This seems a neater solution.
It is safe since no legal value type has size 0.

llvm-svn: 44107

dealing with types whose size & alignment are
different on different subtargets.  Use it for x86 f80.

llvm-svn: 43988

llvm-svn: 40986

llvm-svn: 37940

zext/sext/aext stuff.

llvm-svn: 35008

from formal attributes' flags processing.

llvm-svn: 34963

llvm-svn: 34724

llvm-svn: 34720

llvm-svn: 34697

llvm-svn: 34696