Make the back-pointer from `MCSymbolData` to `MCSymbol` private,
preparing to remove the back pointer entirely. I've already updated all
the users, although for now it's still used to indicate whether
`MCSymbol::Data` has been initialized.
llvm-svn: 237868
Remove the last use of `MCSymbolData::getSymbol()`. There's some
*really* hairy stuff going on in `MachObjectWriter::WriteNList()` that I
want to come back to. In particular, it updates `Symbol` to point at
its aliasee (if any), but leaves `Data` behind, and it's not clear
whether everything makes sense there.
For now I've left the logic unchanged by adding `OrigSymbol` and moving
the FIXME from r237750 up a bit higher. I've filed PR23598 to track
looking into this.
llvm-svn: 237867
breakpoint only if the process it was for is still alive. We need to always remove this because
it has a pointer to the old loader, and if we ever hit it we will crash. I also put in a sanity
check in the callback function to make sure we don't invoke it if the process is wrong.
<rdar://problem/21006189>
llvm-svn: 237866
MSVC 2015 includes the std::data() template function added to C++17. ADL
causes both cl.exe and clang-cl to prefer std::data over our static
helper here, and we get errors about converting int64_t* to StringRef.
Renaming it to bytes avoids the ambiguity.
llvm-svn: 237863
MSVC 2015 appears to be unable to find the correct operator== here. I
haven't yet filed a bug with Microsoft as I've been unable to create a
reduced test case.
llvm-svn: 237862
Fixes PR23599, another miscompile introduced by r235232: when there is
another dependency on the destination of the created memset (i.e., the
part of the original destination that the memcpy doesn't depend on)
between the memcpy and the original memset, we would insert the created
memset after the memcpy, and thus after the other dependency.
Instead, insert the created memset right after the old one.
llvm-svn: 237858
Add a check for bool-like conversions for the condition expression of
conditional operators. This is similiar to the checking of condition
expressions of if statements, for-loops, while-loops, and do-while loops.
Specificially, this is to fix the problem of assert("message") not triggering
-Wstring-conversion when the assert macro uses a conditional operator.
llvm-svn: 237856
The ByteStreamer here wasn't taking account of whether the asm streamer was text based and verbose. Only with that combination should we emit comments.
This change makes sure that we only actually convert a Twine to a string using Twine::str() if we need the comment. This saves about 10000 small allocations on a test case involving the verify-use_list-order bitcode going through llc with debug info.
Note, this is NFC as the comments would ultimately never be emitted unless required.
Reviewed by Duncan Exon Smith and David Blaikie.
llvm-svn: 237851
This reverts commit 0037b6bcbc874aa1b93d7ce3ad8dba3753ee2d9d (r237827).
David Blaikie suggested some alternatives to this which are better. Reverting to apply a better solution later.
llvm-svn: 237849
Cached CMake variables need to have a prefix so they don't collide with other
projects. This change (a lot of simple changes) simply prefixes cached variables
with LIBOMP_ and sets all of these variables to UPPERCASE which is convention.
e.g., os => LIBOMP_OS, ompt_support => LIBOMP_OMPT_SUPPORT.
Differential Revision: http://reviews.llvm.org/D9829
llvm-svn: 237845
Ideally this is going to be and LLVM IR pass (shared, among others
with AArch64), but for the time being just enable it if consumers
ask us for optimization and not unconditionally.
Discussed with Tim Northover on IRC.
llvm-svn: 237837
It's a lot faster than bash.
Also use FileCheck instead of grep to search through a binary file.
Cygwin's grep isn't working here for unknown reasons that probably
aren't worth investigating.
llvm-svn: 237834
This commit modifies the memory buffer creation in the AsmParser library so
that it requires a terminating null character. The LLLexer in the AsmParser
library checks for EOF only when it sees a null character, thus it would
be best to require it when creating a memory buffer so that the memory
buffer constructor can verify that a terminating null character is indeed
present.
Reviewers: Duncan P. N. Exon Smith, Matthias Braun
Differential Revision: http://reviews.llvm.org/D9883
llvm-svn: 237833
Summary: It should default to working-dir/src-filename if dst is not specified.
Reviewers: clayborg, flackr
Reviewed By: flackr
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D9890
llvm-svn: 237831
DebugLocDwarfExpression::EmitOp was creating temporary strings by concatenating Twine's.
When emitting to object files, these comments are thrown away.
This commit adds a boolean to the constructor of the DwarfExpression to control whether it will actually emit
any comments. This prevents it from even generating the temporary comments which would have been thrown away anyway.
llvm-svn: 237827
This code appends the filename to the directory then looks that up in a StringMap. We should be using the existing Twine::toStringRef method instead of Twine::str() as most times we'll succeed in the lookup.
Its possible that we should also consider allowing StringMap to lookup a key using a Twine in addition to a StringRef but that would complicate the code with little known benefit above and beyond this change.
This saves 170k temporary allocations when running llc on the verify_use_list_order bitcode with debug info for x86.
llvm-svn: 237823
DAG.FoldConstantArithmetic() can fail even though both operands are
Constants if OpaqueConstants are involved. Continue trying other combine
possibilities in tis case.
Differential Revision: http://reviews.llvm.org/D6946
Somewhat related to PR21801 / rdar://19211454
llvm-svn: 237822
Make sure if we're truncating a constant that would then be sign extended
that the sign extension of the truncated constant is the same as the
original constant.
> Canonicalize min/max expressions correctly.
>
> This patch introduces a canonical form for min/max idioms where one operand
> is extended or truncated. This often happens when the other operand is a
> constant. For example:
>
> %1 = icmp slt i32 %a, i32 0
> %2 = sext i32 %a to i64
> %3 = select i1 %1, i64 %2, i64 0
>
> Would now be canonicalized into:
>
> %1 = icmp slt i32 %a, i32 0
> %2 = select i1 %1, i32 %a, i32 0
> %3 = sext i32 %2 to i64
>
> This builds upon a patch posted by David Majenemer
> (https://www.marc.info/?l=llvm-commits&m=143008038714141&w=2). That pass
> passively stopped instcombine from ruining canonical patterns. This
> patch additionally actively makes instcombine canonicalize too.
>
> Canonicalization of expressions involving a change in type from int->fp
> or fp->int are not yet implemented.
llvm-svn: 237821
This reverts part of r237808.
The CMP0057 warnings came from an old development build of CMake that
nobody else has. We don't need the cruft.
llvm-svn: 237819
Duncan P. N. Exon Smith