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It doesn't really make sense to emit language specific diagnostics in a discarded statement, and suppressing these diagnostics results in a programming pattern that many users will feel is quite useful. Basically, this makes sure we only emit errors from the 'true' side of a 'constexpr if'. It does this by making the ExprEvaluatorBase type have an opt-in option as to whether it should visit discarded cases. Differential Revision: https://reviews.llvm.org/D102251
63 lines
1.5 KiB
Plaintext
63 lines
1.5 KiB
Plaintext
// RUN: %clang_cc1 -fcxx-exceptions -fcuda-is-device -fsyntax-only -std=c++17 -verify %s
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#include "Inputs/cuda.h"
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// Error, instantiated on device.
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inline __host__ __device__ void hasInvalid() {
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throw NULL;
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// expected-error@-1 2{{cannot use 'throw' in __host__ __device__ function}}
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}
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inline __host__ __device__ void hasInvalid2() {
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throw NULL;
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// expected-error@-1 2{{cannot use 'throw' in __host__ __device__ function}}
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}
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inline __host__ __device__ void hasInvalidDiscarded() {
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// This is only used in the discarded statements below, so this should not diagnose.
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throw NULL;
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}
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static __device__ void use0() {
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hasInvalid(); // expected-note {{called by 'use0'}}
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hasInvalid(); // expected-note {{called by 'use0'}}
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if constexpr (true) {
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hasInvalid2(); // expected-note {{called by 'use0'}}
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} else {
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hasInvalidDiscarded();
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}
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if constexpr (false) {
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hasInvalidDiscarded();
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} else {
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hasInvalid2(); // expected-note {{called by 'use0'}}
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}
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if constexpr (false) {
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hasInvalidDiscarded();
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}
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}
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// To avoid excessive diagnostic messages, deferred diagnostics are only
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// emitted the first time a function is called.
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static __device__ void use1() {
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use0(); // expected-note 4{{called by 'use1'}}
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use0();
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}
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static __device__ void use2() {
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use1(); // expected-note 4{{called by 'use2'}}
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use1();
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}
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static __device__ void use3() {
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use2(); // expected-note 4{{called by 'use3'}}
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use2();
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}
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__global__ void use4() {
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use3(); // expected-note 4{{called by 'use4'}}
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use3();
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}
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