llvm-svn: 169817

llvm/Target/TargetMachine.h will not provide "llvm/TargetTransformInfo.h" any more.

llvm-svn: 169816

We don't want to relax all instructions in

$ clang -c test.s

since most users don't pass -O when using the driver to assemble.

On the other hand, -save-temps should not change the output unnecessary, so in

$ clang -c test.c -save-temps

we should relax all instructions.

llvm-svn: 169815

llvm-svn: 169814

llvm-svn: 169813

llvm-svn: 169812

llvm-svn: 169811

<rdar://problem/10976636>

llvm-svn: 169810

Make sure that the user's choice of a format for dumping aggregate types is persisted to child members

llvm-svn: 169809

make it clear that this is the list of callee-saved registers,
add reference to the ABI doc that this comes from.

llvm-svn: 169807

Don't load __LINKEDIT segments when dynamically loading kexts.

llvm-svn: 169806

definition, rather than at the end of the definition of the set of nested
classes. We still defer checking of the user-specified exception specification
to the end of the nesting -- we can't check that until we've parsed the
in-class initializers for non-static data members.

llvm-svn: 169805

llvm-svn: 169803

try to reduce the width of this load, and would end up transforming:

  (truncate (lshr (sextload i48 <ptr> as i64), 32) to i32)
to
  (truncate (zextload i32 <ptr+4> as i64) to i32)

We lost the sext attached to the load while building the narrower i32
load, and replaced it with a zext because lshr always zext's the
results. Instead, bail out of this combine when there is a conflict
between a sextload and a zext narrowing. The rest of the DAG combiner
still optimize the code down to the proper single instruction:

  movswl 6(...),%eax

Which is exactly what we wanted. Previously we read past the end *and*
missed the sign extension:

  movl 6(...), %eax

llvm-svn: 169802

This test case uses -mcpu=corei7 so it belongs in CodeGen/X86

Reviewed by: Nadav

llvm-svn: 169801

llvm-svn: 169799

llvm-svn: 169798

This shouldn't affect codegen for -O0 compiles as tail call markers are not
emitted in unoptimized compiles.  Testing with the external/internal nightly
test suite reveals no change in compile time performance.  Testing with -O1,
-O2 and -O3 with fast-isel enabled did not cause any compile-time or
execution-time failures.  All tests were performed on my x86 machine.
I'll monitor our arm testers to ensure no regressions occur there.

In an upcoming clang patch I will be marking the objc_autoreleaseReturnValue
and objc_retainAutoreleaseReturnValue as tail calls unconditionally.  While
it's theoretically true that this is just an optimization, it's an
optimization that we very much want to happen even at -O0, or else ARC
applications become substantially harder to debug.

Part of rdar://12553082

llvm-svn: 169796

inlined.

Fixes a false positive that occurs if a user writes their own
initWithBytesNoCopy:freeWhenDone wrapper.

llvm-svn: 169795

llvm-svn: 169794

controls each of the abbreviation sets (only a single one at the
moment) and computes offsets separately as well for each set
of DIEs.

No real function change, ordering of abbreviations for the skeleton
CU changed but only because we're computing in a separate order. Fix
the testcase not to care.

llvm-svn: 169793

Adding a summary for NSError

llvm-svn: 169792

1. Teach it to use overlapping unaligned load / store to copy / set the trailing
   bytes. e.g. On 86, use two pairs of movups / movaps for 17 - 31 byte copies.
2. Use f64 for memcpy / memset on targets where i64 is not legal but f64 is. e.g.
   x86 and ARM.
3. When memcpy from a constant string, do *not* replace the load with a constant
   if it's not possible to materialize an integer immediate with a single
   instruction (required a new target hook: TLI.isIntImmLegal()).
4. Use unaligned load / stores more aggressively if target hooks indicates they
   are "fast".
5. Update ARM target hooks to use unaligned load / stores. e.g. vld1.8 / vst1.8.
   Also increase the threshold to something reasonable (8 for memset, 4 pairs
   for memcpy).

This significantly improves Dhrystone, up to 50% on ARM iOS devices.

rdar://12760078

llvm-svn: 169791

Analyse Phis under the starting assumption that they are NoAlias. Recursively
look at their inputs.
If they MayAlias/MustAlias there must be an input that makes them so.

Addresses bug 14351.

llvm-svn: 169788

When there is XPC connection error, we will report it now.

llvm-svn: 169787

InitSections is called before the MCContext is initialized it could cause
duplicate temporary symbols to be emitted later (after context initialization
resets the temporary label counter).

llvm-svn: 169785

beyond array bounds.

No test case since I cannot reproduce an ICE with this bug. According
to Carlos -- the bug reporter -- a segfault occurs only when LLVM is
compiled with a specific version of GCC.

llvm-svn: 169783

When displaying function.name-with-args format will now print "varname=<unavailable>" instead of omitting argument names and values when there is an error reading the value.

llvm-svn: 169781

llvm-svn: 169780

llvm-svn: 169779

llvm-svn: 169778

llvm-svn: 169776

llvm-svn: 169775

llvm-svn: 169774

llvm-svn: 169773

llvm-svn: 169772

llvm-svn: 169771

The linker will call `lto_codegen_add_must_preserve_symbol' on all globals that
should be kept around. The linker will pretend that a dylib is being created.
<rdar://problem/12528059>

llvm-svn: 169770

llvm-svn: 169768

- gcc does not like -fno-rtti mixed with dynamic_cast<> (in cxa_demangle.cpp)

llvm-svn: 169767