We need to bitcast the index operand to a floating point type so that it matches the result type. If not then the passthru part of the DAG will be a bitcast from the index's original type to the destination type. This makes it very difficult to match. The other option would be to add 5 sets of patterns for every other possible type.
llvm-svn: 280696
It doesn't work because we're looking for a bitcast from the v4i32 index operand to v4f32 for the passthru part of the DAG. But since the index is bitcasted from v2i64 and bitcasts fold, we actually have a bitcast from v2i64 to v4f32 in the passthru part of the DAG.
Taken from optimized output from clang's test case.
llvm-svn: 280695
When a process stops due to a crash, we get the crashing instruction and the
crashing memory location (if there is one). From the user's perspective it is
often unclear what the reason for the crash is in a symbolic sense.
To address this, I have added new fuctionality to StackFrame to parse the
disassembly and reconstruct the sequence of dereferneces and offsets that were
applied to a known variable (or fuction retrn value) to obtain the invalid
pointer.
This makes use of enhancements in the disassembler, as well as new information
provided by the DWARF expression infrastructure, and is exposed through a
"frame diagnose" command. It is also used to provide symbolic information, when
available, in the event of a crash.
The algorithm is very rudimentary, and it needs a bunch of work, including
- better parsing for assembly, preferably with help from LLVM
- support for non-Apple platforms
- cleanup of the algorithm core, preferably to make it all work in terms of
Operands instead of register/offset pairs
- improvement of the GetExpressioPath() logic to make prettier expression
paths, and
- better handling of vtables.
I welcome all suggestios, improvements, and testcases.
llvm-svn: 280692
This isn't the right thing to do - it turns out a number of the APIs
that "never fail" just exit(1) if something bad happens. We can and
should thread Error through this instead.
That diff will make more sense with this reverted. Sorry for the
noise.
This reverts r280690
llvm-svn: 280691
This simplifies ListReducer and most of its subclasses by removing the
std::string &Error that was threaded through all of them but almost
never used. If we end up needing error handling in more places here we
can reinstate it using llvm::Error instead of these unwieldy strings.
The 2 cases (out of 12) that actually can hit the error cases are a
little bit awkward now, but those will clean up as I refactor this API
further.
llvm-svn: 280690
This is a Windows ARM specific issue. If the code path in the if conversion
ends up using a relocation which will form a IMAGE_REL_ARM_MOV32T, we end up
with a bundle to ensure that the mov.w/mov.t pair is not split up. This is
normally fine, however, if the branch is also predicated, then we end up trying
to predicate the bundle.
For now, report a bundle as being unpredicatable. Although this is false, this
would trigger a failure case previously anyways, so this is no worse. That is,
there should not be any code which would previously have been if converted and
predicated which would not be now.
Under certain circumstances, it may be possible to "predicate the bundle". This
would require scanning all bundle instructions, and ensure that the bundle
contains only predicatable instructions, and converting the bundle into an IT
block sequence. If the bundle is larger than the maximal IT block length (4
instructions), it would require materializing multiple IT blocks from the single
bundle.
llvm-svn: 280689
Use ADT/BitmaskEnum for DINode::DIFlags for the following purposes:
* Get rid of unsigned int for flags to avoid problems on platforms with sizeof(int) < 4
* Flags are now strongly typed
Patch by: Victor Leschuk <vleschuk@gmail.com>
Differential Revision: https://reviews.llvm.org/D23766
llvm-svn: 280686
The latest MSVC update apparently resolve the call from the
const ref variant to itself, leading to an infinite
recursion. It is not clear to me why the r-value overload is
not selected. `ValueT` is a pointer type, and the functional-style
cast in the call `insert_as(ValueT(V), LookupKey);` should result
in a r-value ref. A bug in MSVC?
Differential Revision: https://reviews.llvm.org/D23956
llvm-svn: 280685
All of the builtins are designed to be invoked with ARM AAPCS CC even on ARM
AAPCS VFP CC hosts. Tweak the default initialisation to ARM AAPCS CC rather
than C CC for ARM/thumb targets.
The changes to the tests are necessary to ensure that the calling convention for
the lowered library calls are honoured. Furthermore, these adjustments cause
certain branch invocations to change to branch-and-link since the returned value
needs to be moved across registers (d0 -> r0, r1).
llvm-svn: 280683
Summary:
Move early uses of spilled variables after CoroBegin.
For example, if a parameter had address taken, we may end up with the code
like:
define @f(i32 %n) {
%n.addr = alloca i32
store %n, %n.addr
...
call @coro.begin
This patch fixes the problem by moving uses of spilled variables after CoroBegin.
Reviewers: majnemer
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D24234
llvm-svn: 280678
As Pavel pointed out in a comment on llvm.org/pr30271, the VPATH I was
using here to eliminate duplication of a .cpp file had a side effect of
attempting to pull in a .o/.obj file from that same parent dir, where
other tests can be running in parallel. This is no good.
For now, I have removed the VPATH, which should address
llvm.org/pr30271. I have also removed the XFAIL.
llvm-svn: 280675
Lots of unittests started failing under asan after r280455. It seems
they've been failing for a long time, but lit silently ignored them.
Downgrade the error so we can figure out what is going on.
Filed http://llvm.org/PR30285.
llvm-svn: 280674
The code is now written in terms of source and dest classes with feature checks inside each type of copy instead of having separate functions for each feature set.
llvm-svn: 280673
I'm in the progress of adding ARMv6 support to CloudABI. On the compiler
side, everything seems to work properly with this tiny change applied.
llvm-svn: 280672
Summary:
During building of recent compiler-rt sources on FreeBSD for arm, I
noticed that our unwind.h (which originates in libunwind) was missing
the `_US_ACTION_MASK` constant:
compiler-rt/lib/builtins/gcc_personality_v0.c:187:18: error: use of undeclared identifier '_US_ACTION_MASK'
if ((state & _US_ACTION_MASK) != _US_UNWIND_FRAME_STARTING)
^
It appears that both clang's internal unwind.h, and libgcc's unwind.h
define this constant as 3, so let's add this to libunwind's version too.
Reviewers: logan, kledzik, davide, emaste
Subscribers: joerg, davide, aemerson, emaste, llvm-commits
Differential Revision: https://reviews.llvm.org/D24222
llvm-svn: 280669
Summary:
The Intel(R) Memory Protection Extensions (Intel(R) MPX) associates pointers
to bounds, against which the software can check memory references to
prevent out of bound memory access.
This patch allows accessing the MPX registers:
* bnd0-3: 128-bit registers to hold the bound values,
* bndcfgu, bndstatus: 64-bit configuration registers,
This patch also adds read/write tests for the MPX registers in the register
command tests and adds a new subdirectory for MPX specific tests.
Signed-off-by: Valentina Giusti <valentina.giusti@intel.com>
Reviewers: labath, granata.enrico, lldb-commits, clayborg
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D24187
llvm-svn: 280668
On most architectures the linker is required to optimize away any
references to __tls_get_addr in case of static linking. As usual
a special case is MIPS - libc defines __tls_get_addr itself because
there are no TLS optimizations for this architecture.
llvm-svn: 280664
Summary:
Replace uses of the local MIUtilParse::CRegexParser class with the LLVM support class llvm::Regex. This reduces duplication of code, and makes it possible to remove the MIUtilParse::CRegexParser class that requires LLVM internal implementation headers.
Bug: https://llvm.org/bugs/show_bug.cgi?id=29138
Reviewers: dawn, abidh, ki.stfu
Subscribers: labath, ki.stfu, lldb-commits
Differential Revision: https://reviews.llvm.org/D23882
Author: Michał Górny <mgorny@gentoo.org>
llvm-svn: 280662
This test code previously caused a failure in the module verifier,
because SimplifyCFG created this invalid instruction, which tries to
take the address of inline asm:
%.sink = select i1 %1, i64 ()* asm "mov $0, #1", "=r", i64 ()* asm %"mov $0, #2", "=r"
This has been fixed recently, presumably by James Molloy's patches that
re-wrote and changed parts of SimplifyCFG, so this patch just adds a
regression test for it.
Differential Revision: https://reviews.llvm.org/D24231
llvm-svn: 280660
r280613 introduced failures for all builds that don't target x86 by default. Add an explicit target to avoid a missing feature diagnostic.
llvm-svn: 280658
When optimizing, GCC optimizes away aggressively unused static globals.
The __asan_before_dynamic_init/__asan_after_dynamic_init calls are placed
in static constructor earlier while the registration of the globals is done
later in the compilation process. If all the globals with
dynamic initialization are optimized away from some particular TU in between
those two, libasan can fail on an assertion that dynamic_init_globals is
empty.
While I'm going to commit a GCC change which will remove the
__asan_before_dynamic_init/__asan_after_dynamic_init in many cases when this
happens (basically if the optimizers can prove there are no memory
references in between the two calls), there are still testcases where such
pair of calls is left, e.g. for
struct S { S () { asm volatile ("" : : : "memory"); } };
static S c;
int
main ()
{
return 0;
}
with -O2 -fsanitize=address and ASAN_OPTIONS=check_initialization_order=true
this still fails the assertion. Trying to avoid this problem on the
compiler side would decrease code quality I'm afraid, whether it is making
sure for -fsanitize=address we keep around at least one dynamically
initialized global if the
__asan_before_dynamic_init/__asan_after_dynamic_init pair has been emitted,
or adding some artificial global which would be used as the condition for
those calls etc.
So, can the assertion be instead just removed, this really shouldn't slow
down the calls measurably (for __asan_before_dynamic_init it is even
cheaper) and the assertion doesn't check something worthwhile anyway (it is
sufficient if there is a single dynamically initialized global in any other
TU to make it happy).
Details in http://gcc.gnu.org/PR77396
Author: Jakub Jelinek
llvm-svn: 280657
The check-polly-tests target runs regression/unit tests but without checking
formatting. This is useful to not having to reload a file in an open editor
(which eg. clears the undo buffer, moves cursor/window position) when running
polly-update-format.
After this change, the following test targets exist:
- check-polly-unittests to run unittests only
- check-polly-tests to run unit and regression tests
- polly-check-format to check formatting using clang-format
- check-polly to run them all
As a side-effect, when running check-polly, polly-check-format and run in
parallel (instead of polly-check-format first).
Differential Revision: https://reviews.llvm.org/D24191
llvm-svn: 280654
Previously we were extending to copying the whole ZMM register. The register allocator shouldn't use XMM16-31 or YMM16-31 in this configuration as the instructions to spill them aren't available.
llvm-svn: 280648
Summary:
A frontend may designate a particular suspend to be final, by setting the second argument of the coro.suspend intrinsic to true. Such a suspend point has two properties:
* it is possible to check whether a suspended coroutine is at the final suspend point via coro.done intrinsic;
* a resumption of a coroutine stopped at the final suspend point leads to undefined behavior. The only possible action for a coroutine at a final suspend point is destroying it via coro.destroy intrinsic.
This patch adds final suspend handling logic to CoroEarly and CoroSplit passes.
Now, the final suspend point example from docs\Coroutines.rst compiles and produces expected result (see test/Transform/Coroutines/ex5.ll).
Reviewers: majnemer
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D24068
llvm-svn: 280646
Craig Topper