Also add some checks to not merge globals used within landing pad instructions or marked as "used".

llvm-svn: 177331

Report and suggested fix by Tom Honermann!
http://llvm.org/bugs/show_bug.cgi?id=13020

llvm-svn: 177330

I have filed http://llvm.org/bugs/show_bug.cgi?id=15538 against clang.
This code is safer anyway because "cast" assumes you really know that
it's okay to make the cast. In this case isa should not be false and
dyn_cast should not return null as far as I understand. But everything
else is valid so I did not want to revert my previous patch for attributes
mips16/nomips16 or use an llvm_unreachable here which would make a number
of our tests fail for mips.

llvm-svn: 177329

Hal Finkel recently added code to allow unaligned memory references
for PowerPC.  Two tests were temporarily modified with
-disable-ppc-unaligned to keep them from failing.  This patch adjusts
the expected code generation for the unaligned references.

llvm-svn: 177328

llvm-svn: 177327

We hitch a ride with the existing OpndItins class that was used to add
instruction itinerary classes in the many multiclasses in this file.

Use the link provided by the X86FoldableSchedWrite.Folded to find the
right SchedWrite for folded loads.

llvm-svn: 177326

llvm-svn: 177325

any, and add a note that we cannot treat __int128 as an extended integral type.

llvm-svn: 177324

This new-style scheduling information is going to replace the
instruction iteneraries.

This also serves as a test case for Andy's fix in r177317.

llvm-svn: 177323

This handles the case where we have an inbounds GEP with alloca as the pointer.
This fixes the regression in PR12750 and rdar://13286434.
Note that we can also fix this by handling some GEP cases in isKnownNonNull.

llvm-svn: 177321

reports, and implement implicit definition of inheriting constructors.
Remaining missing features: inheriting constructor templates, implicit
exception specifications for inheriting constructors, inheriting constructors
from dependent bases.

llvm-svn: 177320

llvm-svn: 177319

llvm-svn: 177318

Properly handle cases where a group of instructions have different
SchedRW lists with the same itinerary class.
This was supposed to work, but I left in an early break.

llvm-svn: 177317

Apparently my final cleanup to use a relevant suffix for these tests before
committing r176831 caused them to stop running since lit wasn't configured to
run tests with that suffix in those directories (why don't we just have a
global suffix list?). So, add the suffix to the relevant directories & fix the
test that has bitrotted over the last week due to my debug info schema changes.

llvm-svn: 177315

llvm-svn: 177314

When doing SCEV based code generation, we ignore instructions calculating values
that are fully defined by a SCEV expression. The values that are calculated by
this instructions are recalculated on demand.

This commit improves the check to verify if certain instructions can be ignored
and recalculated on demand.

llvm-svn: 177313

llvm-svn: 177312

into the pre-preprocessed file to be passed to
modern translator when compiling in no debug mode.
// rdar://13138170

llvm-svn: 177311

Removed raw references to __sun__, __FreeBSD__, __GLIBC__ and __linux__; now just check to see if they are defined.

llvm-svn: 177310

llvm-svn: 177309

llvm-svn: 177307

llvm-svn: 177306

delegating to Generic_GCC::SelectTool (it already updates the tool map).

llvm-svn: 177305

llvm-svn: 177304

llvm-svn: 177303

argument.

llvm-svn: 177301

useIntegratedAs.

llvm-svn: 177300

llvm-svn: 177299

llvm-svn: 177298

llvm-svn: 177297

llvm-svn: 177296

This commit fixes an assert that would occur on loops with large constant counts
(like looping for ((uint32_t) -1) iterations on PPC64). The existing code did
not handle counts that it computed to be negative (asserting instead), but
these can be created with valid inputs.

This bug was discovered by bugpoint while I was attempting to isolate a
completely different problem.

Also, in writing test cases for the negative-count problem, I discovered that
the ori/lsi handling was broken (there was a typo which caused the logic that
was supposed to detect these pairs and extract the iteration count to always
fail). This has now also been corrected (and is covered by one of the new test
cases).

llvm-svn: 177295

Because the initial-value constants had not been added to the list
of instructions considered for DCE the resulting code had redundant
constant-materialization instructions.

llvm-svn: 177294

llvm-svn: 177293

llvm-svn: 177292

llvm-svn: 177291

The always-true "(int)Int == (signed)Int" comparison was found
while experimenting with a potential new Clang warning.

llvm-svn: 177290

greatly reduces memory consumption

llvm-svn: 177289

llvm-svn: 177288