The primary thing that this accomplishes is to allow future re-use of
these routines in more contexts and clarify the behavior w.r.t. loops.
For example, if handling outer loops is desirable, doing so in
a inside-out order becomes straight forward because it walks the loop
nest itself (rather than walking the function's basic blocks) and
de-couples the CMOV rewriting from the loop structure as there isn't
actually anything loop-specific about this transformation.
This patch should be essentially a no-op. It potentially changes the
order in which we visit the inner loops, but otherwise should merely set
the stage for subsequent changes.
Differential Revision: https://reviews.llvm.org/D36783
llvm-svn: 311225
This patch, by hamzasood, implements P0409R2, and allows [=, this] pre-C++2a as an extension (with appropriate warnings) for consistency.
https://reviews.llvm.org/D36572
Thanks Hamza!
llvm-svn: 311224
This doesn't really change anything as Tablegen would have inferred
those indices anyway; defining them gives us shorter names that are
easier to read while debugging (i.e. "ssub_4" rather than
"dsub2_then_ssub_0")
llvm-svn: 311218
They won't affect the DWARF output, but they will mess with the
sorting of the fragments. This fixes the crash reported in PR34159.
https://bugs.llvm.org/show_bug.cgi?id=34159
llvm-svn: 311217
mt.exe performs a tree merge where certain element nodes are combined
into one. This introduces the possibility of xml namespaces conflicting
with each other. The original mt.exe has a hierarchy whereby certain
namespace names can override others, and nodes that would then end up in
ambigious namespaces have their namespaces explicitly defined. This
namespace handles this merging process.
llvm-svn: 311215
"Prevent negative chars from being sign-extended into isprint and isspace which take and int and crash if the int is negative"
https://reviews.llvm.org/D36620
llvm-svn: 311207
Clamp function was too optimistic when choosing signed or unsigned min/max function for calculations.
In fact, `!IsSignedPredicate` guarantees us that `Smallest` and `Greatest` can be compared safely using unsigned
predicates, but we did not check this for `S` which can in theory be negative.
This patch makes Clamp use signed min/max for cases when it fails to prove `S` being non-negative,
and it adds a test where such situation may lead to incorrect conditions calculation.
Differential Revision: https://reviews.llvm.org/D36873
llvm-svn: 311205
Since stripDebugInfo runs before the verifier when reading IR, we can
end up in a situation where we read some invalid IR but don't know its
invalid yet. Before this patch we would crash in stripDebugInfo when
given IR with a completely empty basic block, and after we get a nice
error from the verifier instead.
llvm-svn: 311202
This patch hides the .debug_str offset and DIE reference offsets into
the CU when llvm-dwarfdump is invoked with -brief.
Differential Revision: https://reviews.llvm.org/D36835
llvm-svn: 311201
Summary:
This also changes the output order of the changes. Now the matches are
printed in pre-order, intertwined with insertions, updates, and moves.
Deletions are printed afterwards.
Reviewers: arphaman
Subscribers: klimek
Differential Revision: https://reviews.llvm.org/D36179
llvm-svn: 311200
This made it awkward to switch over an enum where some entries
are partial and is unlikley to catch any bugs.
Differential revision: https://reviews.llvm.org/D36777
llvm-svn: 311191
Summary:
This test was broken by the tail duplication logic being changed in
r311139, update the test values and add a note about how to properly run
a benchmark to verify that the values are safe to update.
Reviewers: vitalybuka
Reviewed By: vitalybuka
Subscribers: dvyukov, kubamracek
Differential Revision: https://reviews.llvm.org/D36889
llvm-svn: 311189
Summary:
Memcpy intrinsics have size argument of any integer type, like i32 or i64.
Fixed size type along with its value when cloning the intrinsic.
Reviewers: davidxl, xur
Reviewed By: davidxl
Subscribers: mcrosier, llvm-commits
Differential Revision: https://reviews.llvm.org/D36844
llvm-svn: 311188
Summary:
Augment SanitizerCoverage to insert maximum stack depth tracing for
use by libFuzzer. The new instrumentation is enabled by the flag
-fsanitize-coverage=stack-depth and is compatible with the existing
trace-pc-guard coverage. The user must also declare the following
global variable in their code:
thread_local uintptr_t __sancov_lowest_stack
https://bugs.llvm.org/show_bug.cgi?id=33857
Reviewers: vitalybuka, kcc
Reviewed By: vitalybuka
Subscribers: kubamracek, hiraditya, cfe-commits, llvm-commits
Differential Revision: https://reviews.llvm.org/D36839
llvm-svn: 311186
Summary:
Arguments can be specified after -ignore_remaining_args=1 to modify
the compiler invocation. For example, the following command-line
will fuzz LLVM with a custom optimization level and target triple:
clang-proto-fuzzer CORPUS/ -ignore_remaining_args -O3 \
-triple arm64-apple-ios9
Reviewers: vitalybuka, kcc
Reviewed By: vitalybuka
Subscribers: aemerson, cfe-commits, kristof.beyls
Differential Revision: https://reviews.llvm.org/D36882
llvm-svn: 311185
As for now, the parser supports a limited set of statements and
resources. This will be extended in the following patches.
Thanks to Nico Weber (thakis) for his original work in this area.
This patch was originally submitted as r311175 and got reverted
in r311177 because of the problems with compilation under gcc.
Differential Revision: https://reviews.llvm.org/D36340
llvm-svn: 311184
This diff fixes analyzer's crash (triggered assert) on the newly added test case.
The assert being discussed is assert(!B.lookup(R, BindingKey::Direct))
in lib/StaticAnalyzer/Core/RegionStore.cpp, however the root cause is different.
For classes with empty bases the offsets might be tricky.
For example, let's assume we have
struct S: NonEmptyBase, EmptyBase {
...
};
In this case Clang applies empty base class optimization and
the offset of EmptyBase will be 0, it can be verified via
clang -cc1 -x c++ -v -fdump-record-layouts main.cpp -emit-llvm -o /dev/null.
When the analyzer tries to perform zero initialization of EmptyBase
it will hit the assert because that region
has already been "written" by the constructor of NonEmptyBase.
Test plan:
make check-all
Differential revision: https://reviews.llvm.org/D36851
llvm-svn: 311182
This patch teaches the SDag type legalizer how to split up debug info for
integer values that are split into a hi and lo part.
(re-commit)
Differential Revision: https://reviews.llvm.org/D36805
llvm-svn: 311181
This is an updated version of https://reviews.llvm.org/D22144 by @jlpeyton.
The patch was accepted but not landed.
This is useful functionality and I would like to use this to enable lit tests for environment variable behaviour.
Differential Revision: https://reviews.llvm.org/D36403
llvm-svn: 311180
As the incremental API is now used in several transforms, printing
the whole dominator tree creates a lot of noise when running with
the `-debug` flag. This patch fixes that.
llvm-svn: 311176
As for now, the parser supports a limited set of statements and
resources. This will be extended in the following patches.
Thanks to Nico Weber (thakis) for his original work in this area.
Differential Revision: https://reviews.llvm.org/D36340
llvm-svn: 311175
An environment variable can be in one of three states:
1. undefined.
2. defined with a non-empty value.
3. defined but with an empty value.
The windows implementation did not support case 3
(it was not handling errors). The Linux implementation
is already correct.
Differential Revision: https://reviews.llvm.org/D36394
llvm-svn: 311174
Summary:
Support command line options for build path and extra arguments
This emulates the options accepted by clang tools that use CommonOptionsParser.
Add a flag for controlling the maximum size parameter for bottom up matching.
Reviewers: arphaman
Subscribers: klimek
Differential Revision: https://reviews.llvm.org/D36177
llvm-svn: 311173
Fix to the computation of the rightmost descendant.
Prevents root nodes from being mapped if they are already mapped. This
only makes a difference when we compare AST Nodes other than entire
translation units, a feature which still has to be tested.
Reviewers: arphaman
Subscribers: klimek
Differential Revision: https://reviews.llvm.org/D36176
llvm-svn: 311172
Summary:
`getelementptr` is frequently abbreviated as "GEP", often in source files that
do not ever reference the full name of the instruction. Add it to the Lexicon,
in case readers go to look for what it means there.
Test plan:
1. `ninja sphinx`
2. Confirm that the rendered docs HTML contains the new "GEP" entry
llvm-svn: 311168
Summary:
When trying to expand memory accesses, the current version of Polly uses statement Level dependences. The actual implementation is not working in case of multiple dependences per statement. For example in the following source code :
```
void mse(double A[Ni], double B[Nj], double C[Nj], double D[Nj]) {
int i,j;
for (j = 0; j < Ni; j++) {
for (int i = 0; i<Nj; i++)
S: B[i] = i;
for (int i = 0; i<Nj; i++)
T: D[i] = i;
U: A[j] = B[j];
C[j] = D[j];
}
}
```
The statement U has two dependences with S and T. The current version of polly fails during expansion.
This patch aims to fix this bug. For that, we use Reference Level dependences to be able to filter dependences according to statement and memory ref. The principle of expansion remains the same as before.
We also noticed that we need to bail out if load come after store (at the same position) in same statement. So a check was added to isExpandable.
Contributed by: Nicholas Bonfante <nicolas.bonfante@insa-lyon.fr>
Reviewers: Meinersbur, simbuerg, bollu
Reviewed By: Meinersbur, simbuerg
Subscribers: pollydev, llvm-commits
Differential Revision: https://reviews.llvm.org/D36791
llvm-svn: 311165
Chandler Carruth