Fix a bug in spill weight computation. If the alias is a super-register, and the super-register is in the register class we are trying to allocate. Then add the weight to all sub-registers of the super-register even if they are not aliases.                                                                                                  
e.g. allocating for GR32, bh is not used, updating bl spill weight.                                                                                                        
     bl should get the same spill weight otherwise it will be choosen                                                                                              
     as a spill candidate since spilling bh doesn't make ebx available.
This fix PR2866.

llvm-svn: 67574

llvm-svn: 67573

A test case to test that -warn-dead-stores does not emit a warning for stores to variables marked with '#pragma unused'.

llvm-svn: 67570

llvm-svn: 67569

llvm-svn: 67565

On a synthetic command line consisting of almost all defined options,
this drops wall time from .00494 to .00336 and user time from .00258
to .00105.

On the same benchmark, clang-driver is about 15% faster than the
primary gcc driver and almost twice as fast as the gcc driver driver.

llvm-svn: 67564

same as a normal i80 {low64, high16} rather
than its own {high64, low16}.  A depressing number
of places know about this; I think I got them all.
Bitcode readers and writers convert back to the old
form to avoid breaking compatibility.

llvm-svn: 67562

llvm-svn: 67560

llvm-svn: 67559

a data dependency on the load node, so it really needs a
data-dependence edge to the load node, even if the load previously
existed.

And add a few comments.

llvm-svn: 67554

llvm-svn: 67553

llvm-svn: 67552

llvm-svn: 67551

More improvements to abstract type checking. Handle arrays correctly, and make sure to check parameter types before they decay.

llvm-svn: 67550

clang doesn't support, and don't want to warn are unused. Eventually
these should disappear.

Here is a more readable list than is in the diff:

W options: -Wall, -Wcast-align, -Wchar-align, -Wchar-subscripts,
-Werror, -Wextra, -Winline, -Wint-to-pointer-cast, -Wmissing-braces,
-Wmost, -Wnested-externs, -Wno-format-y2k, -Wno-four-char-constants,
-Wno-missing-field-initializers, -Wno-trigraphs, -Wno-unknown-pragmas,
-Wno-unused-parameter, -Wparentheses, -Wpointer-arith,
-Wpointer-to-int-cast, -Wreturn-type, -Wshorten-64-to-32, -Wswitch,
-Wunused-function, -Wunused-label, -Wunused-value, -Wunused-variable,
-Wwrite-strings.

f options: -fasm-blocks, -fmessage-length=.

llvm-svn: 67549

Release-Asserts mode).

Also, avoid searching through option groups (which will never match).

llvm-svn: 67548

llvm-svn: 67545

llvm-svn: 67544

llvm-svn: 67543

llvm-svn: 67542

library function, accept this declaration and pretend that we do not
know that this is a library function. autoconf depends on this
(broken) behavior.

llvm-svn: 67541

actually have uses, which reflects the way it's used.

llvm-svn: 67540

This matters in assembler mode, where this is silently allowed.
This fixes rdar://6709206.

llvm-svn: 67539

<rdar://problem/6704930> involving SimpleConstraintManager not reasoning well
about symbolic constraint values involving arithmetic operators.

llvm-svn: 67534

prototype. Thanks Eli!

llvm-svn: 67533

llvm-svn: 67532

in an SUnit, instead of just the first one. This fix is needed
by some upcoming scheduler changes.

llvm-svn: 67531

llvm-svn: 67530

llvm-svn: 67529

defs, regardless of whether they are actually used.

llvm-svn: 67528

 - Patch by Ed Schoeten!

llvm-svn: 67527

explicitly flush it.

llvm-svn: 67526

llvm-svn: 67525

llvm-svn: 67524

llvm-svn: 67523

static member functions, and add getIncomingValueNumForOperand
and getIncomingBlockNumForOperand, which are the respective
inverses.

llvm-svn: 67522

values passed-by-reference to unknown functions.

llvm-svn: 67519

llvm-svn: 67518

llvm-svn: 67517

Model inline asm constraint which ties an input to an output register as machine operand TIED_TO constraint. This eliminated the need to pre-allocate registers for these. This also allows register allocator can eliminate the unneeded copies.

llvm-svn: 67512