llvm-svn: 45314

llvm-svn: 45313

llvm-svn: 45312

us to compile:
#include <math.h>
int t1(double d) { return signbit(d); }

into:

_t1:
	movd	%xmm0, %rax
	shrq	$63, %rax
	ret

instead of:

_t1:
	movd	%xmm0, %rax
	shrq	$32, %rax
	shrl	$31, %eax
	ret

on x86-64.

llvm-svn: 45311

llvm-svn: 45310

Remove critical edge breaking.  It won't be necessary as long as we are very careful when inserting copies.

llvm-svn: 45309

llvm-svn: 45307

not merge current bb and succ even if bb's terminator is
unconditional branch to succ.

llvm-svn: 45305

llvm-svn: 45304

llvm-svn: 45300

of this patch is the last line).

llvm-svn: 45289

as on functions.  Make it verify invokes and not just
ordinary calls.  As a (desired) side-effect, it is no
longer legal to have call attributes on arguments that
are being passed to the varargs part of a varargs
function (llvm-as drops them on the floor anyway).

llvm-svn: 45286

return attributes on the floor.  In the case of a call
to a varargs function where the varargs arguments are
being removed, any call attributes on those arguments
need to be dropped.  I didn't do this because I plan to
make it illegal to have such attributes (see next patch).
With this change, compiling the gcc filter2 eh test at -O0
and then running opt -std-compile-opts on it results in
a correctly working program (compiling at -O1 or higher
results in the test failing due to a problem with how we
output eh info into the IR).

llvm-svn: 45285

llvm-svn: 45282

llvm-svn: 45281

llvm-svn: 45280

llvm-svn: 45268

llvm-svn: 45259

(icmp slt (sub A B) 1) -> (icmp sle A B)
icmp sgt (sub A B) -1) -> (icmp sge A B)

and add testcase.

llvm-svn: 45256

llvm-svn: 45253

llvm-svn: 45252

Clean up previous patch: PHI uses should not prevent iv reuse if all other uses are addresses. This trades a constant multiply for one fewer iv.

llvm-svn: 45251

has a single use, and generalize it to not require N to be a constant.

llvm-svn: 45250

llvm-svn: 45245

- vec_const.ll: Vector constant loads
- immed64.ll: i64, f64 constant loads

llvm-svn: 45242

llvm-svn: 45230

to exceptions rather than variants for error handling in Ocaml.

llvm-svn: 45226

are a couple of issues that show up with the optimizer,
but I don't think they're really EH problems.
(llvm-gcc testsuite users note:  By default the testsuite
uses the unwinding code that's built as part of your local
llvm-gcc, which does not work.  You need to trick it into
using the installed system unwinding code to get useful
results.)

llvm-svn: 45221

llvm-svn: 45219

calls 'nounwind'.  It is important for correct C++
exception handling that nounwind markings do not get
lost, so this transformation is actually needed for
correctness.

llvm-svn: 45218

(vector insertions)

llvm-svn: 45216

llvm-svn: 45198

to know about calls that cannot throw ('nounwind'):
if such a call does throw for some reason then the
personality will terminate the program.  The distinction
between an ordinary call and a nounwind call is that
an ordinary call gets an entry in the exception table
but a nounwind call does not.  This patch sets up the
exception table appropriately.  One oddity is that
I've chosen to bracket nounwind calls with labels (like
invokes) - the other choice would have been to bracket
ordinary calls with labels.  While bracketing
ordinary calls is more natural (because bracketing
by labels would then correspond exactly to getting an
entry in the exception table), I didn't do it because
introducing labels impedes some optimizations and I'm
guessing that ordinary calls occur more often than
nounwind calls.  This fixes the gcc filter2 eh test,
at least at -O0 (the inliner needs some tweaking at
higher optimization levels).

llvm-svn: 45197

llvm-svn: 45196

llvm-svn: 45190

llvm-svn: 45186

llvm-svn: 45182

llvm-svn: 45178

from
_foo:
        movl    $99, %ecx
        movl    4(%esp), %eax
        subl    %eax, %ecx
        xorl    %edx, %edx
        testl   %ecx, %ecx
        cmovs   %edx, %eax
        ret

to
_foo:
        xorl    %ecx, %ecx
        movl    4(%esp), %eax
        cmpl    $99, %eax
        cmovg   %ecx, %eax
        ret

llvm-svn: 45173

llvm-svn: 45172