llvm-svn: 51358

llvm-svn: 51357

hoist them.

llvm-svn: 51356

llvm-svn: 51351

now that instcombine also has ComputeNumSignBits.

llvm-svn: 51350

llvm-svn: 51349

ComputeNumSignBits to SelectionDAG's ComputeNumSignBits.

llvm-svn: 51348

llvm-svn: 51345

llvm-svn: 51335

llvm-svn: 51330

the contributed code.

llvm-svn: 51329

Rename the last test with .llx extension to .ll, resolve duplicate test by renaming to isnan2. Now that no test has llx ending there is no need to search for them from dg.exp too.

llvm-svn: 51328

llvm-svn: 51327

llvm-svn: 51326

llvm-svn: 51324

wrong directory, this is the patch to fix it (also attached)."

Patch by 'OvermindDL1'

llvm-svn: 51323

llvm-svn: 51322

llvm-svn: 51321

llvm-svn: 51320

llvm-svn: 51319

in Sema, per discussion on mailing list.  This doesn't cause any changes 
in the test results.  I'll probably add some more tests at some point, 
but it's an open question what we need to accept to be compatible with 
real code.

This doesn't touch the existing isConstantExpr method on Expr; that 
should be addressed somehow eventually (either removed or refined to 
whatever is appropriate).

llvm-svn: 51318

consensus was that it was fine; iso646 is trivial.

We actually don't need that many headers overall... on Ubuntu, at least, 
all we need are stdint.h, stdarg.h, limits.h, and float.h to stop 
depending on having gcc's headers around for normal code.

On a side note, the path searching needs some improvement; I had to 
hardcode the path to my header directory into clang.cpp to get the 
driver to use it consistently.

llvm-svn: 51317

llvm-svn: 51316

llvm-svn: 51313

as far as I can tell, and it fixes code like test/CodeGen/functions.c.

(Whatever performance effect it might have, crashing on a 
construct like this isn't really acceptable; I've run into this 
multiple times.)

llvm-svn: 51312

extend beyond the end of the function.

I'm not completely sure this is the right way to fix this bug, so 
someone familiar with the parser should double-check.

llvm-svn: 51311

llvm-svn: 51310

llvm-svn: 51309

llvm-svn: 51308

Sema. No codegen yet.

llvm-svn: 51307

If local spiller optimization turns some instruction into an identity copy, it will be removed. If the output register happens to be dead (and source is obviously killed), transfer the kill / dead information to last use / def in the same MBB.

llvm-svn: 51306

llvm-svn: 51305

llvm-svn: 51304

llvm-svn: 51303

  (add (sext x), cst) --> (sext (add x, cst'))
  (add (sext x), (sext y)) --> (sext (add int x, y))
  (add double (sitofp x), fpcst) --> (sitofp (add int x, intcst))
  (add double (sitofp x), (sitofp y)) --> (sitofp (add int x, y))

This generally reduces conversions.  For example MiBench/telecomm-gsm
gets these simplifications:

HACK2: 	%tmp67.i142.i.i = sext i16 %tmp6.i141.i.i to i32		; <i32> [#uses=1]
	%tmp23.i139.i.i = sext i16 %tmp2.i138.i.i to i32		; <i32> [#uses=1]
	%tmp8.i143.i.i = add i32 %tmp67.i142.i.i, %tmp23.i139.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i121.i.i = sext i16 %tmp6.i120.i.i to i32		; <i32> [#uses=1]
	%tmp23.i118.i.i = sext i16 %tmp2.i117.i.i to i32		; <i32> [#uses=1]
	%tmp8.i122.i.i = add i32 %tmp67.i121.i.i, %tmp23.i118.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i.i190.i = sext i16 %tmp6.i.i189.i to i32		; <i32> [#uses=1]
	%tmp23.i.i187.i = sext i16 %tmp2.i.i186.i to i32		; <i32> [#uses=1]
	%tmp8.i.i191.i = add i32 %tmp67.i.i190.i, %tmp23.i.i187.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i173.i.i.i = sext i16 %tmp6.i172.i.i.i to i32		; <i32> [#uses=1]
	%tmp23.i170.i.i.i = sext i16 %tmp2.i169.i.i.i to i32		; <i32> [#uses=1]
	%tmp8.i174.i.i.i = add i32 %tmp67.i173.i.i.i, %tmp23.i170.i.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i152.i.i.i = sext i16 %tmp6.i151.i.i.i to i32		; <i32> [#uses=1]
	%tmp23.i149.i.i.i = sext i16 %tmp2.i148.i.i.i to i32		; <i32> [#uses=1]
	%tmp8.i153.i.i.i = add i32 %tmp67.i152.i.i.i, %tmp23.i149.i.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i.i.i.i = sext i16 %tmp6.i.i.i.i to i32		; <i32> [#uses=1]
	%tmp23.i.i5.i.i = sext i16 %tmp2.i.i.i.i to i32		; <i32> [#uses=1]
	%tmp8.i.i7.i.i = add i32 %tmp67.i.i.i.i, %tmp23.i.i5.i.i		; <i32> [#uses=3]


This also fixes a bug in ComputeNumSignBits handling select and
makes it more aggressive with and/or.

llvm-svn: 51302

llvm-svn: 51301

llvm-svn: 51300

Reclaim memory from chains of ScopedDecls, and reclaim memory for the initializers of EnumConstantDecls.

llvm-svn: 51299

llvm-svn: 51298

Fixed a bug in ParmVarDecl::param_end(): Handle the case where there are no
ParmVarDecls for a FunctionDecl, but its function prototype has formal arguments
(can happen with typedefs).

llvm-svn: 51297