llvm-svn: 47264

llvm-svn: 47263

For now, avoid commuting def MI for copy MI's whose source is not killed. That simply trade a live interval for another and because only the non-two-address operands can be folded into loads, may end up pessimising code.

llvm-svn: 47262

this speeds it up 2.3% on eon.

llvm-svn: 47261

llvm-svn: 47260

llvm-svn: 47259

llvm-svn: 47258

llvm-svn: 47257

only applies to the first parameter.

llvm-svn: 47256

llvm-svn: 47255

a function must be the first parameter.

llvm-svn: 47254

Fix a comment, and a bug where we weren't applying the tail call logic in cases that failed the first test.

llvm-svn: 47253

llvm-svn: 47252

llvm-svn: 47251

If we see a memcpy of a pointer, make sure to check later
uses of the pointer as well.

llvm-svn: 47250

llvm-svn: 47249

llvm-svn: 47248

Also, noalias arguments are be considered "like" stack allocated ones for this purpose, because
the only way they can be modref'ed is if they escape somewhere in the current function.

llvm-svn: 47247

llvm-svn: 47246

llvm-svn: 47245

the second half of PR2047

llvm-svn: 47244

llvm-svn: 47243

llvm-svn: 47242

that is also a subtract.  This implements PR2047 and Transforms/Reassociate/subtest2.ll 

llvm-svn: 47241

llvm-svn: 47240

functionality change.

llvm-svn: 47239

llvm-svn: 47238

llvm-svn: 47237

 int foobar(int);
 int foobar() {}

which requires ifdef'ing out a testcase in predefined-function.c.

llvm-svn: 47236

llvm-svn: 47234

llvm-svn: 47233

llvm-svn: 47232

llvm-svn: 47231

llvm-svn: 47230

llvm-svn: 47229

llvm-svn: 47228

llvm-svn: 47227

llvm-svn: 47226

llvm-svn: 47225

but the fixes are reasonable.

llvm-svn: 47224