This fix checks first if the instruction to be folded (e.g. sign-/zero-extend,
or shift) is in the same machine basic block as the instruction we are folding
into.
Not doing so can result in incorrect code, because the value might not be
live-out of the basic block, where the value is defined.
This fixes rdar://problem/18169495.
llvm-svn: 216700
For the following code:
__declspec(dllimport) int f(int x);
int user(int x) {
return f(x);
}
int f(int x) { return 1; }
Clang will drop the dllimport attribute in the AST, but CodeGen would have
already put it on the LLVM::Function, and that would never get updated.
(The same thing happens for global variables.)
This makes Clang check dropped DLL attribute case each time the LLVM object
is referenced.
This isn't perfect, because we will still get it wrong if the function is
never referenced by codegen after the attribute is dropped, but this handles
the common cases and makes us not fail in the verifier.
llvm-svn: 216699
This change is the last in the pack of five commits
(also see r216691, r216694, r216695, and r216696) that reduces the number
of test failures in "check-clang" invocation in UBSan bootstrap
from 2443 down to 5.
llvm-svn: 216697
Don't promote byval pointer arguments when when their size in bits is
not equal to their alloc size in bits. This can happen for x86_fp80,
where the size in bits is 80 but the alloca size in bits in 128.
Promoting these types can break passing unions of x86_fp80s and other
types.
Patch by Thomas Jablin!
Reviewed By: rnk
Differential Revision: http://reviews.llvm.org/D5057
llvm-svn: 216693
The AArch64 target lowering for [zs]ext of vectors is set up to handle
input simple types and expects the generic SDag path to do something reasonable
with anything that's not a simple type. The code, however, was only
checking that the result type was a simple type and assuming that
implied that the source type would also be a simple type. That's not a
valid assumption, as operations like "zext <1 x i1> %0 to <1 x i32>"
demonstrate. The fix is to simply explicitly validate the source type
as well as the result type.
PR20791
llvm-svn: 216689
With this patch we call external tools for powerpc-darwin with "-arch ppc"
instead of "-arch powerpc", so as to be compatible with the cctools assembler
and ld64 linker.
Patch by Stephen Drake!
llvm-svn: 216687
For hosts that cannot support long thread names, shrink the host
wait4 thread name so that it does not truncate the PID in the thread name.
Change by Shawn Best.
llvm-svn: 216686
On MachO, putting a symbol that doesn't start with a 'L' or 'l' in one of the
__TEXT,__literal* sections prevents the linker from merging the context of the
section.
Since private GVs are the ones the get mangled to start with 'L' or 'l', we now
only put those on the __TEXT,__literal* sections.
llvm-svn: 216682
When a relocation is applied to a location, the new value needs
to be added to the existing value at the location. Existing
value is in most cases zero, but if not, the current code does
not work.
llvm-svn: 216680
was marked custom. The target independent DAG combine has no way to know if
the shuffles it is introducing are ones that the target could support or not.
llvm-svn: 216678
linkage related to generation of OBJC_SELECTOR_REFERENCES symbol
needed in generation of call to 'super' in a class method.
// rdar://18150301
llvm-svn: 216676
Summary:
Cache the memoization data for DynTypedNodes.
It is free to do so on create(), but expensive to determine dynamically.
Reviewers: klimek
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D5101
llvm-svn: 216671
This change:
* properly captures execs in NativeProcessLinux.
* clears out all non-main-thread thread metadata in NativeProcessLinux on exec.
* adds a DidExec() method to the NativeProcessProtocol delegate.
* clears out the auxv data cache when we exec (on Linux).
This is a small part of the llgs for local Linux debugging work going on here:
https://github.com/tfiala/lldb/tree/dev-llgs-local
I'm breaking it into small patches.
llvm-svn: 216670
The current default abi when no environment is given is "apcs-gnu",
which is obsolete. This patch changes the default to "aapcs". "aapcs" has both
hard- and soft-float variants, so the -mhard-float, -msoft-float and
-mfloat-abi= options now all behave as expected when no environment is
specified in the triple.
While writing this I also noticed that a preprocessor test claims to be
checking darwin, but is actually checking the defaults, which are
different for darwin.
llvm-svn: 216662
InstSimplify already handles icmp (X+Y), X (and things like it)
appropriately. The first thing that InstCombine does is run
InstSimplify on the instruction.
llvm-svn: 216659
Summary:
ACLE 2.0 section 9.2 defines the following "miscellaneous data processing intrinsics": `__clz`, `__cls`, `__ror`, `__rev`, `__rev16`, `__revsh` and `__rbit`.
`__clz` has already been implemented in the arm_acle.h header file. The rest are not supported yet. This patch completes ACLE data processing intrinsics.
Reviewers: t.p.northover, rengolin
Reviewed By: rengolin
Subscribers: aemerson, mroth, llvm-commits
Differential Revision: http://reviews.llvm.org/D4983
llvm-svn: 216658
For a detailed description of the problem see the comment in the test file.
The problematic moveBefore() calls are not required anymore because the new
scheduling algorithm ensures a correct ordering anyway.
llvm-svn: 216656
Juergen Ributzka