Unsigned addition and subtraction can reuse the instructions created to
legalize large width operations (i.e. both produce and consume a carry flag).
Signed operations and multiplies get a dedicated op-with-overflow instruction.
Once this is produced the two values are combined into a struct register (which
will almost always be merged with a corresponding G_EXTRACT as part of
legalization).
llvm-svn: 279278
Repeated inserts into AliasSetTracker have quadratic behavior - inserting a
pointer into AST is linear, since it requires walking over all "may" alias
sets and running an alias check vs. every pointer in the set.
We can avoid this by tracking the total number of pointers in "may" sets,
and when that number exceeds a threshold, declare the tracker "saturated".
This lumps all pointers into a single "may" set that aliases every other
pointer.
(This is a stop-gap solution until we migrate to MemorySSA)
This fixes PR28832.
Differential Revision: https://reviews.llvm.org/D23432
llvm-svn: 279274
This doesn't change tests codegen as we already combined to blend+zero which is what we lower VZEXT_MOVL to on SSE41+ targets, but it does put us in a better position when we improve shuffling for optsize.
llvm-svn: 279273
The intended transform is:
// Simplify icmp eq (or (ptrtoint P), (ptrtoint Q)), 0
// -> and (icmp eq P, null), (icmp eq Q, null).
P and Q are both pointer types, but may have different types. We need
two calls to getNullValue() to make the icmps.
llvm-svn: 279271
Summary: We will need these in AMDGPU's new SchedStrategy implmentation.
Reviewers: MatzeB, atrick
Subscribers: llvm-commits, MatzeB
Differential Revision: https://reviews.llvm.org/D23679
llvm-svn: 279270
CGSCC use a WeakVH to track call sites. RAUW a call within a function
can result in that WeakVH getting confused about whether or not the call
site is still around.
llvm-svn: 279268
This is fix for PR28976.
Problem was that in scanRelocs, we computed relocation offset too early
for case when linkerscript was used. Patch fixes the issue
delaying the calculation.
Differential revision: https://reviews.llvm.org/D23655
llvm-svn: 279264
Of course, we really need to refactor and fix all of the cmp predicates,
but this one is interesting because without it, we later perform an
information-losing transform of icmp (shl 1, Y), C, and we can't recover
the better fold.
llvm-svn: 279263
This patch is opposite to D19024, which made this symbols to be hidden by default.
Unfortunately FreeBSD loader wants to see
start_set_modmetadata_set/stop_set_modmetadata_set in the dynamic symbol table.
They were not placed there because had hidden visibility.
Patch makes them to have default visibility again.
Differential revision: https://reviews.llvm.org/D23552
llvm-svn: 279262
Previously DT_PREINIT_ARRAYSZ, DT_INIT_ARRAYSZ and DT_FINI_ARRAYSZ
were set to zero when lincerscript was used becase sections sizes are
calculated later that were taken.
Patch delays values calculation for these entries. Testcase is provided.
Differential revision: https://reviews.llvm.org/D23663
llvm-svn: 279258
You can force input section alignment within an output section by using SUBALIGN. The
value specified overrides any alignment given by input sections, whether larger or smaller.
SUBALIGN is used in many projects in the wild.
Differential revision: https://reviews.llvm.org/D23063
llvm-svn: 279256
Introduce a new CMake option `COMPILER_RT_SANITIZERS_TO_BUILD` which takes
either a special token `all` (default) which will preserve the current behaviour
or a CMake list of sanitizers to build. It will still perform the normal checks
if the sanitizer is requested. It only permits a further means to exclude a
particular sanitizer. This gives finer grained control than
`COMPILER_RT_BUILD_SANITIZERS` which only gives an all or nothing control.
llvm-svn: 279253
In addition, the branch instructions will have proper BB destinations, not offsets, like before.
Patch by Vadzim Dambrouski!
Differential Revision: https://reviews.llvm.org/D20162
llvm-svn: 279242
Improved handling of fma, floating point min/max, additional load/store
instructions for floating point types.
Patch by Jyotsna Verma.
llvm-svn: 279239
Summary:
The Print() members might take optional access_size and bug_type
parameters to still be able to provide the same information
Reviewers: kcc, samsonov
Subscribers: kubabrecka, llvm-commits
Differential Revision: https://reviews.llvm.org/D23658
llvm-svn: 279237
Tim Northover