[Clang FE, SystemZ] Recognize -mpacked-stack CL option

Recognize -mpacked-stack from the command line and add a function attribute
"mpacked-stack" when passed. This is needed for building the Linux

[Clang FE, SystemZ] Recognize -mpacked-stack CL option

Recognize -mpacked-stack from the command line and add a function attribute
"mpacked-stack" when passed. This is needed for building the Linux kernel.

If this option is passed for any other target than SystemZ, an error is
generated.

Review: Ulrich Weigand
https://reviews.llvm.org/D71441

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Default to -fuse-init-array

Very few ELF platforms still use .ctors/.dtors now. Linux (glibc: 1999-07),
DragonFlyBSD, FreeBSD (2012-03) and Solaris have supported .init_array
for many years. Some a

Default to -fuse-init-array

Very few ELF platforms still use .ctors/.dtors now. Linux (glibc: 1999-07),
DragonFlyBSD, FreeBSD (2012-03) and Solaris have supported .init_array
for many years. Some architectures like AArch64/RISC-V default to
.init_array . GNU ld and gold can even convert .ctors to .init_array .

It makes more sense to flip the CC1 default, and only uses
-fno-use-init-array on platforms that don't support .init_array .
For example, OpenBSD did not support DT_INIT_ARRAY before Aug 2016
(https://github.com/openbsd/src/commit/86fa57a2792c6374b0849dd7b818a11e676e60ba)

I may miss some ELF platforms that still use .ctors, but their
maintainers can easily diagnose such problems.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D71393

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[OpenMP] Use the OpenMP-IR-Builder

This is a follow up patch to use the OpenMP-IR-Builder, as discussed on
the mailing list ([1] and later) and at the US Dev Meeting'19.

[1] http://lists.flang-comp

[OpenMP] Use the OpenMP-IR-Builder

This is a follow up patch to use the OpenMP-IR-Builder, as discussed on
the mailing list ([1] and later) and at the US Dev Meeting'19.

[1] http://lists.flang-compiler.org/pipermail/flang-dev_lists.flang-compiler.org/2019-May/000197.html

Reviewers: kiranchandramohan, ABataev, RaviNarayanaswamy, gtbercea, grokos, sdmitriev, JonChesterfield, hfinkel, fghanim

Subscribers: ppenzin, penzn, llvm-commits, cfe-commits, jfb, guansong, bollu, hiraditya, mgorny

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69922

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[Frontend] Allow OpenMP offloading to aarch64

Summary:
D30644 added OpenMP offloading to AArch64 targets, then D32035 changed the
frontend to throw an error when offloading is requested for an unsup

[Frontend] Allow OpenMP offloading to aarch64

Summary:
D30644 added OpenMP offloading to AArch64 targets, then D32035 changed the
frontend to throw an error when offloading is requested for an unsupported
target architecture. However the latter did not include AArch64 in the list
of supported architectures, causing the following unit tests to fail:

libomptarget :: api/omp_get_num_devices.c
libomptarget :: mapping/pr38704.c
libomptarget :: offloading/offloading_success.c
libomptarget :: offloading/offloading_success.cpp

Reviewers: pawosm01, gtbercea, jdoerfert, ABataev

Subscribers: kristof.beyls, guansong, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D70804

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Reapply af57dbf12e54 "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior="

Patch was reverted because https://bugs.llvm.org/show_bug.cgi?id=440

Reapply af57dbf12e54 "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior="

Patch was reverted because https://bugs.llvm.org/show_bug.cgi?id=44048
The original patch is modified to set the strictfp IR attribute
explicitly in CodeGen instead of as a side effect of IRBuilder.
In the 2nd attempt to reapply there was a windows lit test fail, the
tests were fixed to use wildcard matching.

Differential Revision: https://reviews.llvm.org/D62731

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Revert " Reapply af57dbf12e54 "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior=""

This reverts commit cdbed2dd856c14687efd741c2d8321686102acb

Revert " Reapply af57dbf12e54 "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior=""

This reverts commit cdbed2dd856c14687efd741c2d8321686102acb8.
Build break on Windows (lit fail)

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Reapply af57dbf12e54 "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior="

Patch was reverted because https://bugs.llvm.org/show_bug.cgi?id=440

Reapply af57dbf12e54 "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior="

Patch was reverted because https://bugs.llvm.org/show_bug.cgi?id=44048
The original patch is modified to set the strictfp IR attribute
explicitly in CodeGen instead of as a side effect of IRBuilder

Differential Revision: https://reviews.llvm.org/D62731

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[ConstExprPreter] Removed the flag forcing the use of the interpreter

Summary:
Removed the ```-fforce-experimental-new-constant-interpreter flag```, leaving
only the ```-fexperimental-new-constant-i

[ConstExprPreter] Removed the flag forcing the use of the interpreter

Summary:
Removed the ```-fforce-experimental-new-constant-interpreter flag```, leaving
only the ```-fexperimental-new-constant-interpreter``` one. The interpreter
now always emits an error on an unsupported feature.

Allowing the interpreter to bail out would require a mapping from APValue to
interpreter memory, which will not be necessary in the final version. It is
more sensible to always emit an error if the interpreter fails.

Reviewers: jfb, Bigcheese, rsmith, dexonsmith

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D70071

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Initial implementation of -fmacro-prefix-map and -ffile-prefix-map

GCC 8 implements -fmacro-prefix-map. Like -fdebug-prefix-map, it replaces a string prefix for the __FILE__ macro.
-ffile-prefix-map

Initial implementation of -fmacro-prefix-map and -ffile-prefix-map

GCC 8 implements -fmacro-prefix-map. Like -fdebug-prefix-map, it replaces a string prefix for the __FILE__ macro.
-ffile-prefix-map is the union of -fdebug-prefix-map and -fmacro-prefix-map

Reviewed By: rnk, Lekensteyn, maskray

Differential Revision: https://reviews.llvm.org/D49466

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Move vtordisp mode from Attr class to LangOptions.h, NFC

This removes one of the two uses of Attr.h in DeclCXX.h, reducing the
need to include Attr.h as widely. LangOptions is already very popular.

clang: Add -fconvergent-functions flag

The CUDA builtin library is apparently compiled in C++ mode, so the
assumption of convergent needs to be made in a typically non-SPMD
language. The functions i

clang: Add -fconvergent-functions flag

The CUDA builtin library is apparently compiled in C++ mode, so the
assumption of convergent needs to be made in a typically non-SPMD
language. The functions in the library should still be assumed
convergent. Currently they are not, which is potentially incorrect and
this happens to work after the library is linked.

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Work on cleaning up denormal mode handling

Cleanup handling of the denormal-fp-math attribute. Consolidate places
checking the allowed names in one place.

This is in preparation for introducing FP

Work on cleaning up denormal mode handling

Cleanup handling of the denormal-fp-math attribute. Consolidate places
checking the allowed names in one place.

This is in preparation for introducing FP type specific variants of
the denormal-fp-mode attribute. AMDGPU will switch to using this in
place of the current hacky use of subtarget features for the denormal
mode.

Introduce a new header for dealing with FP modes. The constrained
intrinsic classes define related enums that should also be moved into
this header for uses in other contexts.

The verifier could use a check to make sure the denorm-fp-mode
attribute is sane, but there currently isn't one.

Currently, DAGCombiner incorrectly asssumes non-IEEE behavior by
default in the one current user. Clang must be taught to start
emitting this attribute by default to avoid regressions when this is
switched to assume ieee behavior if the attribute isn't present.

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Temporarily Revert "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior="
and a follow-up NFC rearrangement as it's causing a crash on valid. Testcase is

Temporarily Revert "Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior="
and a follow-up NFC rearrangement as it's causing a crash on valid. Testcase is on the original review thread.

This reverts commits af57dbf12e54f3a8ff48534bf1078f4de104c1cd and e6584b2b7b2de06f1e59aac41971760cac1e1b79

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Revert "Reland "[clang] Report sanitizer blacklist as a dependency in cc1""

This reverts commit cae4a28864f4e8a55920e2b94e2cd43617902dec.

[clang] Fix -fsanitize-system-blacklist processing in cc1

Reland "[clang] Report sanitizer blacklist as a dependency in cc1"

This reverts commit 3182027282c59c51d5080d83365917fccd695854.

Reland "[clang] Report sanitizer blacklist as a dependency in cc1"

This reverts commit 9b8413ac6e56e7a6e0ba884773d13bcf9414bd43.

Revert "Revert "Revert "[clang] Report sanitizer blacklist as a dependency in cc1"""

This reverts commit 3182027282c59c51d5080d83365917fccd695854.

Revert "Revert "[clang] Report sanitizer blacklist as a dependency in cc1""

This reverts commit 6b45e1bc11e91ea7b57a6ab1c19461a86dba33f8.

Revert "[clang] Report sanitizer blacklist as a dependency in cc1"

This reverts commit 03b84e4f6d0e1c04f22d69cc445f36e1f713beb4.

This breaks dfsan tests with a linking failure, in for example this

Revert "[clang] Report sanitizer blacklist as a dependency in cc1"

This reverts commit 03b84e4f6d0e1c04f22d69cc445f36e1f713beb4.

This breaks dfsan tests with a linking failure, in for example this build:

http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/24312

Reverting this patch locally makes those tests succeed.

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[clang] Report sanitizer blacklist as a dependency in cc1

Previously these were reported from the driver which blocked clang-scan-deps from getting the full set of dependencies from cc1 commands.

A

[clang] Report sanitizer blacklist as a dependency in cc1

Previously these were reported from the driver which blocked clang-scan-deps from getting the full set of dependencies from cc1 commands.

Also the default sanitizer blacklist that is added in driver was never reported as a dependency. I introduced -fsanitize-system-blacklist cc1 option to keep track of which blacklists were user-specified and which were added by driver and clang -MD now also reports system blacklists as dependencies.

Differential Revision: https://reviews.llvm.org/D69290

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Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior=

Add options to control floating point behavior: trapping and
exception behavior, rounding,

Add support for options -frounding-math, ftrapping-math, -ffp-model=, and -ffp-exception-behavior=

Add options to control floating point behavior: trapping and
exception behavior, rounding, and control of optimizations that affect
floating point calculations. More details in UsersManual.rst.

Reviewers: rjmccall

Differential Revision: https://reviews.llvm.org/D62731

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[Clang FE] Recognize -mnop-mcount CL option (SystemZ only).

Recognize -mnop-mcount from the command line and add a function attribute
"mnop-mcount"="true" when passed.

When this option is used, a

[Clang FE] Recognize -mnop-mcount CL option (SystemZ only).

Recognize -mnop-mcount from the command line and add a function attribute
"mnop-mcount"="true" when passed.

When this option is used, a nop is added instead of a call to fentry. This
is used when building the Linux Kernel.

If this option is passed for any other target than SystemZ, an error is
generated.

Review: Ulrich Weigand
https://reviews.llvm.org/D67763

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Recommit "[CodeView] Add option to disable inline line tables."

This reverts commit 004ed2b0d1b86d424643ffc88fce20ad8bab6804.
Original commit hash 6d03890384517919a3ba7fe4c35535425f278f89

Summary:

Recommit "[CodeView] Add option to disable inline line tables."

This reverts commit 004ed2b0d1b86d424643ffc88fce20ad8bab6804.
Original commit hash 6d03890384517919a3ba7fe4c35535425f278f89

Summary:
This adds a clang option to disable inline line tables. When it is used,
the inliner uses the call site as the location of the inlined function instead of
marking it as an inline location with the function location.

https://reviews.llvm.org/D67723

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[cfi] Add flag to always generate .debug_frame

This adds a flag to LLVM and clang to always generate a .debug_frame
section, even if other debug information is not being generated. In
situations whe

[cfi] Add flag to always generate .debug_frame

This adds a flag to LLVM and clang to always generate a .debug_frame
section, even if other debug information is not being generated. In
situations where .eh_frame would normally be emitted, both .debug_frame
and .eh_frame will be used.

Differential Revision: https://reviews.llvm.org/D67216

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