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https://github.com/Gericom/teak-llvm.git
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60d3264d5f
This adds the new pragma and the first variant, contract(on/off/fast). The pragma has the same block scope rules as STDC FP_CONTRACT, i.e. it can be placed at the beginning of a compound statement or at file scope. Similarly to STDC FP_CONTRACT there is no need to use attributes. First an annotate token is inserted with the parsed details of the pragma. Then the annotate token is parsed in the proper contexts and the Sema is updated with the corresponding FPOptions using the shared ActOn function with STDC FP_CONTRACT. After this the FPOptions from the Sema is propagated into the AST expression nodes. There is no change here. I was going to add a 'default' option besides 'on/off/fast' similar to STDC FP_CONTRACT but then decided against it. I think that we'd have to make option uppercase then to avoid using 'default' the keyword. Also because of the scoped activation of pragma I am not sure there is really a need a for this. Differential Revision: https://reviews.llvm.org/D31276 llvm-svn: 299470
86 lines
5.3 KiB
C++
86 lines
5.3 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 %s
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void foo(int i) {
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[[unknown_attribute]] ; // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] { } // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] if (0) { } // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] for (;;); // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] do { // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] continue; // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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} while (0);
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[[unknown_attribute]] while (0); // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] switch (i) { // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] case 0: // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] default: // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] break; // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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}
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[[unknown_attribute]] goto here; // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] here: // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unknown_attribute]] try { // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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} catch (...) {
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}
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[[unknown_attribute]] return; // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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alignas(8) ; // expected-error {{'alignas' attribute cannot be applied to a statement}}
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[[noreturn]] { } // expected-error {{'noreturn' attribute cannot be applied to a statement}}
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[[noreturn]] if (0) { } // expected-error {{'noreturn' attribute cannot be applied to a statement}}
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[[noreturn]] for (;;); // expected-error {{'noreturn' attribute cannot be applied to a statement}}
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[[noreturn]] do { // expected-error {{'noreturn' attribute cannot be applied to a statement}}
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[[unavailable]] continue; // expected-warning {{unknown attribute 'unavailable' ignored}}
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} while (0);
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[[unknown_attributqqq]] while (0); // expected-warning {{unknown attribute 'unknown_attributqqq' ignored}}
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// TODO: remove 'qqq' part and enjoy 'empty loop body' warning here (DiagnoseEmptyLoopBody)
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[[unknown_attribute]] while (0); // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
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[[unused]] switch (i) { // expected-warning {{unknown attribute 'unused' ignored}}
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[[uuid]] case 0: // expected-warning {{unknown attribute 'uuid' ignored}}
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[[visibility]] default: // expected-warning {{unknown attribute 'visibility' ignored}}
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[[carries_dependency]] break; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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}
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[[fastcall]] goto there; // expected-warning {{unknown attribute 'fastcall' ignored}}
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[[noinline]] there: // expected-warning {{unknown attribute 'noinline' ignored}}
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[[lock_returned]] try { // expected-warning {{unknown attribute 'lock_returned' ignored}}
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} catch (...) {
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}
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[[weakref]] return; // expected-warning {{unknown attribute 'weakref' ignored}}
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[[carries_dependency]] ; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] { } // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] if (0) { } // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] for (;;); // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] do { // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] continue; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}} ignored}}
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} while (0);
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[[carries_dependency]] while (0); // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] switch (i) { // expected-error {{'carries_dependency' attribute cannot be applied to a statement}} ignored}}
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[[carries_dependency]] case 0: // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] default: // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] break; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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}
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[[carries_dependency]] goto here; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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[[carries_dependency]] try { // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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} catch (...) {
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}
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[[carries_dependency]] return; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
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{
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[[ ]] // expected-error {{an attribute list cannot appear here}}
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#pragma STDC FP_CONTRACT ON // expected-error {{can only appear at file scope or at the start of a compound statement}}
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#pragma clang fp contract(fast) // expected-error {{can only appear at file scope or at the start of a compound statement}}
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}
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}
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