Summary:
This transform is never a pessimization at the IR level (since it
replaces an `icmp` with another), and has potentiall payoffs:
1. It may make the `icmp` fold away or become loop invariant.
2. It may make the `A & (L - 1)` computation dead.
This shows up in Java, in range checks generated by array accesses of
the form `a[i & (a.length - 1)]`.
Reviewers: reames, majnemer
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12210
llvm-svn: 245635
Summary:
This uses the .clang-format at the root of the LLDB repo and is just a
mechanical change that precedes more work in this file.
Reviewers: clayborg, zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D12217
llvm-svn: 245634
There might be an underlying race condition here that should be
figured out, but this at least prevents the crash for the time
being and doesn't appear to have any adverse effects.
llvm-svn: 245626
Summary:
This is useful when dealing with Windows remote that use only the
qXfer:libraries command which returns absolute base addresses, as
opposed to qXfer:libraries-svr4 which returns relative offsets for
module bases.
Reviewers: clayborg, zturner, ADodds
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D12204
llvm-svn: 245625
and make it always preserve debug locations, since all callers wanted this
behavior anyway.
This is addressing a post-commit review feedback for r245589.
NFC (inside the LLVM tree).
llvm-svn: 245622
Originally, we intersected the iteration space with the AssumedContext before
computing the minimal/maximal memory offset in our run-time alias checks. With
this patch we drop this intersection as the AssumedContext can - for larger or
more complex scops - become very complicated (contain many disjuncts). When
intersecting an object with many disjuncts with other objects, the number of
disjuncts in these other objects also increases quickly. As a result, the
compile time is unnecessarily increased. This patch now drops the intersection
with the assumed context to ensure we do not pay unnecessary compile time
costs.
With this patch we see -3.17% reduction in compile time for 3mm with default
flags and -17.87% when compiling 3mm with -DPOLYBENCH_USE_C99_PROTO flag. We
did not observe any regressions in LNT.
Contributed-by: Pratik Bhatu <cs12b1010@iith.ac.in>
Reviewers: grosser
Differential Revision: http://reviews.llvm.org/D12198
llvm-svn: 245617
Fixes PR23464: one way to use the broadcast intrinsics is:
_mm256_broadcastw_epi16(_mm_cvtsi32_si128(*(int*)src));
We don't currently fold this, but now that we use native IR for
the intrinsics (r245605), we can look through one bitcast to find
the broadcast scalar.
Differential Revision: http://reviews.llvm.org/D10557
llvm-svn: 245613
Summary:
Add an LSR test that exercises isTruncateFree. Without this change, LSR creates
another indvar representing the truncated value.
Reviewers: jholewinski, eliben
Subscribers: jholewinski, llvm-commits
Differential Revision: http://reviews.llvm.org/D12058
llvm-svn: 245611
Summary:
dllexport doesn't work if linking against a static library with its own
copy of snprintf.
Reviewers: zturner
Subscribers: zturner, lldb-commits
Differential Revision: http://reviews.llvm.org/D12206
llvm-svn: 245610
Summary: Size specifier should come after `%` not before.
Reviewers: clayborg, ADodds
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D12203
llvm-svn: 245608
Since r245605, the clang headers don't use these anymore.
r245165 updated some of the tests already; update the others, add
an autoupgrade, remove the intrinsics, and cleanup the definitions.
Differential Revision: http://reviews.llvm.org/D10555
llvm-svn: 245606
This lets us optimize them better. We agreed to remove the intrinsics,
instead of combining them later, as, at -O0, we generate the expected
instructions. Plus, it's a nice cleanup.
Differential Revision: http://reviews.llvm.org/D10556
llvm-svn: 245605
z_Linux_asm.s can use the KMP_OS_* / KMP_MIC macros instead of the predefined
compiler macro checks. The macro logic to determine KMP_MIC is moved from
kmp_os.h to kmp_platform.h.
llvm-svn: 245602
This patch adds support for asan on aarch64-linux with 42-bit VMA
(current default config for 64K pagesize kernels). The support is
enabled by defining the SANITIZER_AARCH64_VMA to 42 at build time
for both clang/llvm and compiler-rt. The default VMA is 39 bits.
For 42-bit VMA aarch64 uses SANITIZIER_CAN_USER_ALLOCATOR64.
llvm-svn: 245596
This patch adds support for asan on aarch64-linux with 42-bit VMA
(current default config for 64K pagesize kernels). The support is
enabled by defining the SANITIZER_AARCH64_VMA to 42 at build time
for both clang/llvm and compiler-rt. The default VMA is 39 bits.
llvm-svn: 245594
To avoid multiple exits and the resulting complicated conditions when
creating a SCoP we now use the single hasFeasibleRuntimeContext()
check to decide if a SCoP should be dismissed right after
construction. If building runtime checks failed the assumed context is
made infeasible, hence the optimized version will never be executed
and the SCoP can be dismissed.
llvm-svn: 245593
Summary:
Refactor, NFC
Extracts computeOverflowForSignedAdd and isKnownNonNegative from NaryReassociate to ValueTracking in case
others need it.
Reviewers: reames
Subscribers: majnemer, llvm-commits
Differential Revision: http://reviews.llvm.org/D11313
llvm-svn: 245591
Instruction::dropUnknownMetadata(KnownSet) is supposed to preserve all
metadata in KnownSet, but the condition for DebugLocs was inverted.
Most users of dropUnknownMetadata() actually worked around this by not
adding LLVMContext::MD_dbg to their list of KnowIDs.
This is now made explicit.
llvm-svn: 245589
Caught by the famous "DebugLoc describes the currect SubProgram" assertion.
When GVN is removing a nonlocal load it updates the debug location of the
SSA value it replaced the load with with the one of the load. In the
testcase this actually overwrites a valid debug location with an empty one.
In reality GVN has to make an arbitrary choice between two equally valid
debug locations. This patch changes to behavior to only update the
location if the value doesn't already have a debug location.
llvm-svn: 245588