InstructionSimplify.cpp.  Other fixups as needed.
Part of rdar://10500969

llvm-svn: 145559

llvm-svn: 145530

Make GlobalMerge honor the preferred alignment on globals without an explicitly specified alignment.

<rdar://problem/10497732>.

llvm-svn: 145523

llvm-svn: 145470

(fptrunc (sqrt (fpext x))) -> (sqrtf x) transformation if -fno-builtin is 
specified.
rdar://10466410

llvm-svn: 145460

Potential bug in RewriteLoopBodyWithConditionConstant: use iterator should not be changed inside the uses enumeration loop.

llvm-svn: 145432

llvm-svn: 145420

weak variable are compiled by different compilers, such as GCC and LLVM, while
LLVM may increase the alignment to the preferred alignment there is no reason to
think that GCC will use anything more than the ABI alignment.  Since it is the
GCC version that might end up in the final program (as the linkage is weak), it
is wrong to increase the alignment of loads from the global up to the preferred
alignment as the alignment might only be the ABI alignment.

Increasing alignment up to the ABI alignment might be OK, but I'm not totally
convinced that it is.  It seems better to just leave the alignment of weak
globals alone.

llvm-svn: 145413

This reverts r139450, fixes r139453, and adds much needed comments and a
unit test.

llvm-svn: 145367

Zap some completely ridiculous code.  There's probably a miscompile here, but I don't really want to try to write a testcase involving an invoke returning a pointer to a varargs function...

llvm-svn: 145347

llvm-svn: 145316

SCEV should now be used for trip count analysis, not LoopInfo.

llvm-svn: 145262

gcc, though I thought it was older (my gcc 4.4 has it as a local patch. Whoops!)
This fixes PR10589.

Also add some debugging statements.

Remove GcnoFiles, the mapping from CompilationUnit to raw_ostream. Now that we
start by iterating over each CU and descending into them, there's no need to
maintain a mapping.

llvm-svn: 145208

llvm-svn: 145154

llvm-svn: 145092

Suggested in code review by Eli.

That code in InstCombine looks kinda suspicious.

llvm-svn: 145013

[asan] workaround for reg alloc bug 11395: don't instrument functions with large chunks of inline assembler

llvm-svn: 144962

quick fix: remove GlobalVariable::GlobalVariable mistakenly commited at r144933. For some reason this compiles on linux 

llvm-svn: 144936

The right way to check for a binary operation is
cast<BinaryOperator>. The original check: cast<Instruction> &&
numOperands() == 2 would match phi "instructions", leading to an
infinite loop in extreme corner case: a useless phi with operands
[self, constant] that prior optimization passes failed to remove,
being used in the loop by another useless phi, in turn being used by an
lshr or udiv.

Fixes PR11350: runaway iteration assertion.

llvm-svn: 144935

fall back to explicit list of allowed linkages when instrumenting globals in asan; add a test check that asan does not touch linkonce_odr

llvm-svn: 144933

Add support for custom names for library functions in TargetLibraryInfo.  Add a custom name for fwrite and fputs on x86-32 OSX.  Make SimplifyLibCalls honor the custom
names for fwrite and fputs.

Fixes <rdar://problem/9815881>.

llvm-svn: 144876

looking at the size of the pointee. Fixes PR11390!

llvm-svn: 144773

llvm-svn: 144758

llvm-svn: 144748

llvm-svn: 144721

llvm-svn: 144675

llvm-svn: 144648

llvm-svn: 144536

build: Attempt to rectify inconsistencies between CMake and LLVMBuild versions of explicit dependencies.
 - The hope is that we have a tool/test to verify these are accurate (and tight) soon.

llvm-svn: 144444

llvm-svn: 144442

llvm-svn: 144416

Get rid of an optimization in SCCP which appears to have many issues.  Specifically, it doesn't handle many cases involving undef correctly, and it is missing other checks which
lead to it trying to re-mark a value marked as a constant with a different value.  It also appears to trigger very rarely.

Fixes PR11357.

llvm-svn: 144352

Size of data being pointed to wasn't always being checked so some small writes were killing big writes

Fixes <rdar://problem/10426753>

llvm-svn: 144312

Currently checks alignment and killing stores on a power of 2 boundary as this is likely
to trim the size of the earlier store without breaking large vector stores into scalar ones.

Fixes <rdar://problem/10140300>

llvm-svn: 144239

LICM pass now understands invariant load metadata.  Nothing generates this yet so it will currently never get used in real tests

llvm-svn: 144107

Fixes r8429

llvm-svn: 144036

<rdar://problem/10405911>

llvm-svn: 144000

llvm-svn: 143808

the end of it is dead.", which appears to break bootstrapping LLVM.

llvm-svn: 143668

llvm-svn: 143634