Update code generator to use this attribute and remove DisableRedZone target option.
Update llc to set this attribute when -disable-red-zone command line option is used.

llvm-svn: 72894

llvm-svn: 72892

using Promote which won't work because i64 isn't
a legal type.  It's easy enough to use Custom, but
then we have the problem that when the type
legalizer is promoting FP_TO_UINT->i16, it has no
way of telling it should prefer FP_TO_SINT->i32
to FP_TO_UINT->i32.  I have uncomfortably hacked
this by making the type legalizer choose FP_TO_SINT
when both are Custom.
This fixes several regressions in the testsuite.

llvm-svn: 72891

RALinScan::attemptTrivialCoalescing() was returning a virtual register instead of the physical register it is allocated to. This resulted in virtual register(s) being added the live-in sets.

llvm-svn: 72890

A value defined by an implicit_def can be liven to a use BB. This is unfortunate. But register allocator still has to add it to the live-in set of the use BB.

llvm-svn: 72889

A value defined by an implicit_def can be liven to a use BB. This is unfortunate. But register allocator still has to add it to the live-in set of the use BB.

llvm-svn: 72888

llvm-svn: 72887

correctly.

llvm-svn: 72886

the CMake-generated Xcode project build properly.

llvm-svn: 72883

string.h builtins to be in the same order as the list in the C99 
standard.)

llvm-svn: 72882

llvm-svn: 72881

llvm-svn: 72880

llvm-svn: 72879

Also, link users manual from the main web page.

llvm-svn: 72878

there must also be an XFAIL line.  Fix a couple
examples of this.

llvm-svn: 72876

llvm-svn: 72875

llvm-svn: 72873

instcombine doesn't know when it's safe. To partially compensate
for this, introduce new code to do this transformation in
dagcombine, which can use UnsafeFPMath.

llvm-svn: 72872

llvm-svn: 72871

llvm-svn: 72870

function of interest, not an operand of it.

llvm-svn: 72869

one.  

llvm-svn: 72868

llvm-svn: 72867

llvm-svn: 72866

LLVM_ENABLE_ASSERTIONS. Fine-tuned the logic that controls the
definition of NDEBUG and _DEBUG macros.

Thanks to Jay Foad for this suggestions.

llvm-svn: 72864

llvm-svn: 72861

llvm-svn: 72858

llvm-svn: 72856

llvm-svn: 72855

llvm-svn: 72854

llvm-svn: 72849

llvm-svn: 72848

llvm-svn: 72846

llvm-svn: 72844

llvm-svn: 72842

llvm-svn: 72838

llvm-svn: 72837

the code tried to use "push", which doesn't exist for XMM registers.)

llvm-svn: 72836

llvm-svn: 72835

llvm-svn: 72834