support any sort of expr, add a new EmitAnyExpr routine.

llvm-svn: 41660

llvm-svn: 41466

llvm-svn: 41463

llvm-svn: 41458

llvm-svn: 41457

llvm-svn: 41444

llvm-svn: 41433

llvm-svn: 41429

llvm-svn: 41414

This patch temporarily breaks compound assignment operators, but greatly simplifies many
things.

llvm-svn: 41355

llvm-svn: 41350

llvm-svn: 41349

llvm-svn: 41345

llvm-svn: 41344

llvm-svn: 41336

llvm-svn: 41256

llvm-svn: 41255

llvm-svn: 41249

llvm-svn: 41247

llvm-svn: 41244

llvm-svn: 41240

llvm-svn: 41239

llvm-svn: 41237

llvm-svn: 41236

llvm-svn: 41235

llvm-svn: 41234

llvm-svn: 41231

llvm-svn: 41226

llvm-svn: 41218

This means that we get rid of tons of intermediate allocas.  For
example:

void foo(double _Complex a, double _Complex b) {
   a = b+a+a;
}

this used to have 4 temporary allocas, now it has zero of them.
This also simplifies the individual visitor methods because they
now can all operate on real/imag pairs instead of having to 
load/store all over the place.

llvm-svn: 41217

llvm-svn: 41216

llvm-svn: 41215

match on binop then explicitly switching again.

llvm-svn: 41214

details in its own file.

llvm-svn: 41213

aggregate value and scalar expression computation are very different, this
gets them away from each other.  This causes a temporary regression on some
complex number examples.

llvm-svn: 41014

llvm-svn: 41002