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[OpenCL] Add builtin header test

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Add a test to verify OpenCL builtin declarations using
OpenCLBuiltins.td.

This test consists of parsing a 60k line generated input file.  The
entire test takes about 60s with a debug build on a decent machine.
Admittedly this is not the fastest test, but doesn't seem excessive
compared to other tests in clang/test/Headers (with one of the tests
taking 85s for example).

RFC: https://lists.llvm.org/pipermail/cfe-dev/2021-April/067973.html

Differential Revision: https://reviews.llvm.org/D97869
This commit is contained in:
Sven van Haastregt 2021-06-10 10:05:53 +01:00
parent 31859f896c
commit c5ffc6f8bd
2 changed files with 23 additions and 0 deletions
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4
clang/test/Headers/lit.local.cfg Normal file
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config.substitutions = list(config.substitutions)
# Enable substituting Clang Sema source directory for TableGen input.
config.substitutions.append(('%clang_src_sema_dir', os.path.join(config.clang_src_dir, 'lib', 'Sema')))

19
clang/test/Headers/opencl-builtins.cl Normal file
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// RUN: clang-tblgen -gen-clang-opencl-builtin-tests %clang_src_sema_dir/OpenCLBuiltins.td -o %t.cl
// RUN: %clang_cc1 -include %s %t.cl -triple spir -verify -fsyntax-only -cl-std=CL2.0 -finclude-default-header
// RUN: %clang_cc1 -include %s %t.cl -triple spir -verify -fsyntax-only -cl-std=CL2.0 -fdeclare-opencl-builtins -finclude-default-header
// Generate an OpenCL source file containing a call to each builtin from
// OpenCLBuiltins.td and then run that generated source file through the
// frontend.
//
// Then test that:
// - The generated file can be parsed using opencl-c.h, giving some confidence
// that OpenCLBuiltins.td does not provide more than what opencl-c.h provides
// (but not vice versa).
//
// - The generated file can be parsed using -fdeclare-opencl-builtins, ensuring
// some internal consistency of declarations in OpenCLBuiltins.td. For
// example, addition of builtin declarations that lead to ambiguity during
// overload resolution will cause this test to fail.
// expected-no-diagnostics