Since all types <32b on gpr end up being assigned gpr32 regclasses, we can end
up with PHIs here which try to select between a gpr32 and an fpr16. Ideally RBS
shouldn't be selecting heterogenous regbanks for operands if possible, but we
still need to be able to deal with it here.
To fix this, if we have a gpr-bank operand < 32b in size and at least one other
operand is on the fpr bank, then we add cross-bank copies to homogenize the
operand banks. For simplicity the bank that we choose to settle on is whatever
bank the def operand has. For example:
%endbb:
%dst:gpr(s16) = G_PHI %in1:gpr(s16), %bb1, %in2:fpr(s16), %bb2
=>
%bb2:
...
%in2_copy:gpr(s16) = COPY %in2:fpr(s16)
...
%endbb:
%dst:gpr(s16) = G_PHI %in1:gpr(s16), %bb1, %in2_copy:gpr(s16), %bb2
Differential Revision: https://reviews.llvm.org/D75086
Summary:
Current LLVM code base does not use error handler with ErrorPolicy.
This patch removes ErrorPolicy from DWARFContext.
This patch is extracted from the D74308.
Reviewers: jhenderson, dblaikie, grimar, aprantl, JDevlieghere
Reviewed By: grimar
Subscribers: hiraditya, llvm-commits
Tags: #llvm, #debug-info
Differential Revision: https://reviews.llvm.org/D75118
Having this as it's own function helps to reduce indentation and allows use of return instead of wiring a value over the switch. A lambda would have also worked, but with slightly deeper nesting.
Summary:
This patch includes several changes to reduce the overall footprint
of the allocator:
- for realloc'd chunks: only keep the same chunk when lowering the size
if the delta is within a page worth of bytes;
- when draining a cache: drain the beginning, not the end; we add pointers
at the end, so that meant we were draining the most recently added
pointers;
- change the release code to account for an freed up last page: when
scanning the pages, we were looking for pages fully covered by blocks;
in the event of the last page, if it's only partially covered, we
wouldn't mark it as releasable - even what follows the last chunk is
all 0s. So now mark the rest of the page as releasable, and adapt the
test;
- add a missing `setReleaseToOsIntervalMs` to the cacheless secondary;
- adjust the Android classes based on more captures thanks to pcc@'s
tool.
Reviewers: pcc, cferris, hctim, eugenis
Subscribers: #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D75142
This patch fixes a bug that would cause dsymutil to collect
.swiftinterface files for the Swift stdlib and other SDK
modules. There is no advantage in copying these since they should be
loaded from the ones bundled with LLDB's embedded Swift compiler
instead and copying them will cause LLDB to recompile them from source
instead of loading their prebuilt cached counterparts in the SDK.
rdar://problem/57463247
Differential Revisions: https://reviews.llvm.org/D75196
Summary: ParsingInlineAsm was a misleading name. These values are only set for MS-style inline assembly.
Reviewed By: rnk
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D75198
As suggested in D75145 -
I'm not sure why, but several passes have this kind of disable/enable flag
implemented at the pass manager level. But that means we have to duplicate
the flag for both pass managers and add code to check the flag every time
the pass appears in the pipeline.
We want a debug option to see if this pass is misbehaving regardless of the
pass managers, so just add a disablement check at the single point before
any transforms run.
Differential Revision: https://reviews.llvm.org/D75204
This commit handles folding spv.LogicalAnd/spv.LogicalOr when
one of the operands is constant true/false.
Differential Revision: https://reviews.llvm.org/D75195
CVP currently does not simplify cmps with instructions in the same
block, because LVI getPredicateAt() currently does not provide
much useful information for that case (D69686 would change that,
but is stuck.) However, if the instruction is a Phi node, then
LVI can compute the result of the predicate by threading it into
the predecessor blocks, which allows it simplify some conditions
that nothing else can handle. Relevant code:
6d6a4590c5/llvm/lib/Analysis/LazyValueInfo.cpp (L1904-L1927)
Differential Revision: https://reviews.llvm.org/D72169
Fails with the following message in the error case:
```
CMake Error at /path/to/llvm-project/compiler-rt/lib/tsan/CMakeLists.txt:119 (message):
Building the TSan runtime requires at least macOS SDK 10.12
```
Fixes#44682.
https://bugs.llvm.org/show_bug.cgi?id=44682
Reviewed By: dmajor, delcypher
Differential Revision: https://reviews.llvm.org/D74501
This is a small pet peeve from me. This change makes sure the AVR backend uses
the correct private label prefix (.L) so that private labels are hidden in
avr-objdump.
Example code:
define i8 @foo(i1 %cond) {
br i1 %cond, label %then, label %else
then:
ret i8 3
else:
ret i8 5
}
When compiling this:
llc -march=avr -filetype=obj -o test.o test.ll
and then dumping it:
avr-objdump -d test.o
You would previously get an ugly temporary label:
00000000 <foo>:
0: 81 70 andi r24, 0x01 ; 1
2: 80 30 cpi r24, 0x00 ; 0
4: f9 f3 breq .-2 ; 0x4 <foo+0x4>
6: 83 e0 ldi r24, 0x03 ; 3
8: 08 95 ret
0000000a <LBB0_2>:
a: 85 e0 ldi r24, 0x05 ; 5
c: 08 95 ret
This patch fixes that, the output is now:
00000000 <foo>:
0: 81 70 andi r24, 0x01 ; 1
2: 80 30 cpi r24, 0x00 ; 0
4: 01 f0 breq .+0 ; 0x6 <foo+0x6>
6: 83 e0 ldi r24, 0x03 ; 3
8: 08 95 ret
a: 85 e0 ldi r24, 0x05 ; 5
c: 08 95 ret
Note that as you can see the breq operand is different. However it is
still the same after linking:
4: 11 f0 breq .+4
Differential Revision: https://reviews.llvm.org/D75124
Adjusting by 2 breaks DWARF output. With this fix, programs start to
compile and produce valid DWARF output.
Differential Revision: https://reviews.llvm.org/D74213
InstCombine removes pairs of start+end intrinsics that don't
have anything in between them. Currently this is done by starting
at the start intrinsic and scanning forwards. This patch changes
it to start at the end intrinsic and scan backwards.
The motivation here is as follows: When we process the start
intrinsic, we have not yet looked at the following instructions,
which may still get folded/removed. If they do, we will only be
able to remove the start/end pair on the next iteration. When we
process the end intrinsic, all the instructions before it have
already been visited, and we don't run into this problem.
Differential Revision: https://reviews.llvm.org/D75011
MSVC does not define __LONG_MAX__, so we were just getting lucky in this
conditional:
#if __LONG_MAX__ == __INT_MAX__
Undefined identifiers evaluate to zero in preprocessor conditionals, so
this became true, which happens to work for MSVC platforms.
Instead, use this pattern and let the compiler constant fold:
return sizeof(long) == sizeof(int) ? SwapByteOrder_32((uint32_t)C)
: SwapByteOrder_64((uint64_t)C);
- Mark memory access for bool vectors as disallowed in target lowering.
This will prevent combining bitcasts of bool vectors with stores.
- Replace the actual bitcasting code with a faster version.
- Handle casting of v16i1 to i16.
Summary:
This change checks for the case where people want to erase a string to the end, i.e., __n == npos, and inlines the call if so.
This also demonstrates keeping the ABI intact for V1, but inlining the erase() method for unstable.
Reviewers: EricWF, mclow.lists, ldionne
Reviewed By: EricWF, ldionne
Subscribers: smeenai, dexonsmith, christof, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D73743
They are purposefully skipped by input section descriptions (rL295324).
Similarly, --orphan-handling= should not warn/error for them.
This behavior matches GNU ld.
Reviewed By: grimar
Differential Revision: https://reviews.llvm.org/D75151
Summary:
The definition of `__libcpp_timed_backoff_policy` and the declaration of
`__libcpp_thread_poll_with_backoff` must not be guarded by
#if !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
because the definitions of `__libcpp_timed_backoff_policy::operator()`
and `__libcpp_thread_poll_with_backoff` aren't guarded by this macro
(and this is correct because these two functions are implemented in
terms of other libc++ functions and don't interact with the host
threading library).
Reviewers: ldionne, __simt__, EricWF, mclow.lists
Reviewed By: ldionne
Subscribers: dexonsmith, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D75191
DevirtSCCRepeatedPass iteration. Needs ReviewPublic
This aims to fix a missed inlining case.
If there's a virtual call in the callee on an alloca (stack allocated object) in
the caller, and the callee is inlined into the caller, the post-inline cleanup
would devirtualize the virtual call, but if the next iteration of
DevirtSCCRepeatedPass doesn't happen (under the new pass manager), which is
based on a heuristic to determine whether to reiterate, we may miss inlining the
devirtualized call.
This enables inlining in clang/test/CodeGenCXX/member-function-pointer-calls.cpp.
Summary:
For builtin compiler-rt, it is built with visibility hidden by default
to avoid the client exporting symbols from libclang static library. The
compiler option -fvisibility=hidden doesn't work on the aliases in c files
because they are created with inline assembly. On Darwin platform,
thoses aliases are exported by default if they are reference by the client.
Fix the issue by adding ".private_extern" to all the aliases if the
library is built with visibility hidden.
rdar://problem/58960296
Reviewers: dexonsmith, arphaman, delcypher, kledzik
Reviewed By: delcypher
Subscribers: dberris, jkorous, ributzka, #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D73577
This doesn't do anything on its own, but it's the first step towards
allowing plugins to define attributes. It does simplify the
ParsedAttrInfo generation in ClangAttrEmitter a little though.
Differential Revision: https://reviews.llvm.org/D31337
empty-sections.test: add two tests adapted from @jhenderson's https://reviews.llvm.org/D74755#1882221
strip-non-alloc.test: improve. D74755 will change the attribution of an empty section.
They mostly test the behavior of Object.cpp:sectionWithinSegment : how we attribute sections to segments.
`ParentSegment` can affect some subtle layout decisions.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D74879
This makes --orphan-handling= less noisy.
This change also improves our compatibility with GNU ld.
GNU ld special cases .symtab, .strtab and .shstrtab . We need output section
descriptions for .symtab, .strtab and .shstrtab to suppress:
<internal>:(.symtab) is being placed in '.symtab'
<internal>:(.shstrtab) is being placed in '.shstrtab'
<internal>:(.strtab) is being placed in '.strtab'
With --strip-all, .symtab and .strtab can be omitted (note, --strip-all is not compatible with --emit-relocs).
Reviewed By: nickdesaulniers
Differential Revision: https://reviews.llvm.org/D75149
This may inhibit vector narrowing in general, but there's
already an inconsistency in the way that we deal with this
pattern as shown by the test diff.
We may want to add a dedicated function for narrowing fneg.
It's often folded into some other op, so moving it away from
other math ops may cause regressions that we would not see
for normal binops.
See D73978 for more details.
Summary:
This patch introduces a function to house the code needed to do the
DWARF64 detection dance. The function decodes the initial length field
and returns it as a pair containing the actual length, and the DWARF
encoding.
This patch does _not_ attempt to handle the problem of detecting lengths
which extend past the size of the section, or cases when reads of a
single contribution accidentally escape beyond its specified length, but
I think it's useful in its own right.
Reviewers: dblaikie, jhenderson, ikudrin
Subscribers: hiraditya, probinson, aprantl, JDevlieghere, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D74560
Summary:
This change adds the macros _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT and _LIBCPP_BUILTIN_CONSTANT_P to detect compile time constants, and optimze the code accordingly.
A planned usage example:
The implementation of basic_string::assign() can short-cut a compile time known short string assignent into a fast and compact inlined assignment:
```
basic_string::assign(const value_type* __s) {
if (_LIBCPP_BUILTIN_CONSTANT_P(__s[0]) && length(__s) < __min_cap) {
copy(pointer(), _s, length(__s) + 1);
set_size(length(__s));
} else {
// delegate / tail call out of line implementation
}
}
```
Subscribers: christof, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D73732
Craig Topper