Make the -print-libgcc-file-name option print an appropriate compiler
runtime library, that is libgcc.a if gcc runtime is used
and an appropriate compiler-rt library if that runtime is used.

The main use for this is to allow linking executables built with
-nodefaultlibs (e.g. to avoid linking to the standard C++ library) to
the compiler runtime library, e.g. using:

  clang++ ... -nodefaultlibs $(clang++ ... -print-libgcc-file-name)

in which case currently a program built like this linked to the gcc
runtime unconditionally. The patch fixes it to use compiler-rt libraries
instead when compiler-rt is the active runtime.

Differential Revision: https://reviews.llvm.org/D25338

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Summary:
With this commit simple coroutines can be created in plain C using coroutine builtins.

Reviewers: rnk, EricWF, rsmith

Subscribers: modocache, mgorny, mehdi_amini, beanz, cfe-commits

Differential Revision: https://reviews.llvm.org/D24373

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[sanitizer-coverage/libFuzzer] make the guards for trace-pc 32-bit; create one array of guards per function, instead of one guard per BB. reorganize the code so that trace-pc-guard does not create unneeded globals

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Warning, treated as error:
/opt/llvm/build.attributes.src/tools/clang/docs/CommandGuide/clang.rst:413: WARNING: unknown option: -save-stats=cwd


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Reviewers: aaron.ballman

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D24928

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This option behaves in a similar spirit as -save-temps and writes
internal llvm statistics in json format to a file.

Differential Revision: https://reviews.llvm.org/D24820

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Reviewers: klimek

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D24821

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Bot now complaining about -flto=thin reference, used similar workaround
for that failure.

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The fix in r282148 was not enough to fix the following error:
/home/llvmbb/llvm-build-dir/clang-sphinx-docs/llvm/src/tools/clang/docs/CommandGuide/clang.rst:338:
WARNING: unknown option: -flto=full

on the sphinx bot:
  http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/16313

(not reproducible locally).

This time, simply remove the option reference.

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/opt/llvm/build.attributes.src/tools/clang/docs/CommandGuide/clang.rst:338: WARNING: unknown option: -flto=full

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Summary: Add some user facing documentation on ThinLTO and how to use it.

Reviewers: mehdi_amini

Subscribers: mehdi_amini, cfe-commits

Differential Revision: https://reviews.llvm.org/D24806

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Since this is a header it will break links to this section.


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Flesh out the section on interpreting coverage reports, mention the
coverage export feature, and add notes on how to build llvm with
coverage turned on.

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[libFuzzer] use 'if guard' instead of 'if guard >= 0' with trace-pc; change the guard type to intptr_t; use separate array for 8-bit counters

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This patch adds an entry for "-rtlib" in the output of `man clang` and `clang -help`.

Patch by Lei Zhang!

Differential Revision: https://reviews.llvm.org/D24069

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padding around table cells so the borders of adjacent tables don't run into
each other (now that they're perfectly aligned).


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order in the .td file.


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Update DiagnosticsReference and fix emitter to emit -Wpedantic diagnostics and groups in a deterministic order.


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[sanitizer-coverage] add yet another flavour of coverage instrumentation: trace-pc-guard. The intent is to eventually replace all of {bool coverage, 8bit-counters, trace-pc} with just this one. Clang part

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Original commit message:

Add -fdiagnostics-show-hotness

Summary:
I've recently added the ability for optimization remarks to include the
hotness of the corresponding code region.  This uses PGO and allows
filtering of the optimization remarks by relevance.  The idea was first
discussed here:
http://thread.gmane.org/gmane.comp.compilers.llvm.devel/98334

The general goal is to produce a YAML file with the remarks.  Then, an
external tool could dynamically filter these by hotness and perhaps by
other things.

That said it makes sense to also expose this at the more basic level
where we just include the hotness info with each optimization remark.
For example, in D22694, the clang flag was pretty useful to measure the
overhead of the additional analyses required to include hotness.
(Without the flag we don't even run the analyses.)

For the record, Hal has already expressed support for the idea of this
patch on IRC.

Differential Revision: https://reviews.llvm.org/D23284

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This reverts commit r281276.

Many bots are failing.

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Summary:
I've recently added the ability for optimization remarks to include the
hotness of the corresponding code region.  This uses PGO and allows
filtering of the optimization remarks by relevance.  The idea was first
discussed here:
http://thread.gmane.org/gmane.comp.compilers.llvm.devel/98334

The general goal is to produce a YAML file with the remarks.  Then, an
external tool could dynamically filter these by hotness and perhaps by
other things.

That said it makes sense to also expose this at the more basic level
where we just include the hotness info with each optimization remark.
For example, in D22694, the clang flag was pretty useful to measure the
overhead of the additional analyses required to include hotness.
(Without the flag we don't even run the analyses.)

For the record, Hal has already expressed support for the idea of this
patch on IRC.

Differential Revision: https://reviews.llvm.org/D23284

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Fixed incorrect docs that referred to:
  objc_arc_weak_unavailable
when it should be:
  objc_arc_weak_reference_unavailable

Patch by: Sean McBride!


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remark flags. For now I'm checking in a copy of the built documentation, but we
can replace this with a placeholder (as we do for the attributes reference
documentation) once we enable building this server-side.


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This adds support for modules that require (non-)freestanding
environment, such as the compiler builtin mm_malloc submodule.

Differential Revision: https://reviews.llvm.org/D23871



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This adds support for modules that require (no-)gnu-inline-asm
environment, such as the compiler builtin cpuid submodule.

This is the gnu-inline-asm variant of https://reviews.llvm.org/D23871

Differential Revision: https://reviews.llvm.org/D23905

rdar://problem/26931199

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to CC1, which are translated to function attributes and can e.g. be mapped on
build attributes FP_exceptions and FP_denormal. Setting these build attributes
allows better selection of floating point libraries.

Differential Revision: https://reviews.llvm.org/D23840


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