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09f9924acf
Due to statement expressions supported as GCC extension, it is possible
to put 'break' or 'continue' into a loop/switch statement but outside
its body, for example:
for ( ; ({ if (first) { first = 0; continue; } 0; }); )
This code is rejected by GCC if compiled in C mode but is accepted in C++
code. GCC bug 44715 tracks this discrepancy. Clang used code generation
that differs from GCC in both modes: only statement of the third
expression of 'for' behaves as if it was inside loop body.
This change makes code generation more close to GCC, considering 'break'
or 'continue' statement in condition and increment expressions of a
loop as it was inside the loop body. It also adds error for the cases
when 'break'/'continue' appear outside loop due to this syntax. If
code generation differ from GCC, warning is issued.
Differential Revision: http://llvm-reviews.chandlerc.com/D2518
llvm-svn: 199897
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -x c++ -Werror %s
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int pr8880_1() {
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int first = 1;
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for ( ; ({ if (first) { first = 0; continue; } 0; }); )
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return 0;
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return 1;
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}
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void pr8880_2(int first) {
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for ( ; ({ if (first) { first = 0; break; } 0; }); ) {}
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}
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void pr8880_3(int first) {
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for ( ; ; (void)({ if (first) { first = 0; continue; } 0; })) {}
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}
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void pr8880_4(int first) {
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for ( ; ; (void)({ if (first) { first = 0; break; } 0; })) {}
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}
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void pr8880_5 (int first) {
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while(({ if (first) { first = 0; continue; } 0; })) {}
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}
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void pr8880_6 (int first) {
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while(({ if (first) { first = 0; break; } 0; })) {}
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}
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void pr8880_7 (int first) {
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do {} while(({ if (first) { first = 0; continue; } 0; }));
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}
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void pr8880_8 (int first) {
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do {} while(({ if (first) { first = 0; break; } 0; }));
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}
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void pr8880_10(int i) {
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for ( ; i != 10 ; i++ )
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for ( ; ; (void)({ ++i; continue; i;})) {} // expected-warning{{'continue' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_11(int i) {
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for ( ; i != 10 ; i++ )
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for ( ; ; (void)({ ++i; break; i;})) {} // expected-warning{{'break' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_12(int i, int j) {
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for ( ; i != 10 ; i++ )
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for ( ; ({if (i) continue; i;}); j++) {} // expected-warning {{'continue' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_13(int i, int j) {
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for ( ; i != 10 ; i++ )
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for ( ; ({if (i) break; i;}); j++) {} // expected-warning{{'break' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_14(int i) {
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for ( ; i != 10 ; i++ )
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while(({if (i) break; i;})) {} // expected-warning {{'break' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_15(int i) {
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while (--i)
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while(({if (i) continue; i;})) {} // expected-warning {{'continue' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_16(int i) {
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for ( ; i != 10 ; i++ )
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do {} while(({if (i) break; i;})); // expected-warning {{'break' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_17(int i) {
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for ( ; i != 10 ; i++ )
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do {} while(({if (i) continue; i;})); // expected-warning {{'continue' is bound to current loop, GCC binds it to the enclosing loop}}
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}
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void pr8880_18(int x, int y) {
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while(x > 0)
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switch(({if(y) break; y;})) {
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case 2: x = 0;
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}
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}
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void pr8880_19(int x, int y) {
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switch(x) {
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case 1:
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switch(({if(y) break; y;})) {
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case 2: x = 0;
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}
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}
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}
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void pr8880_20(int x, int y) {
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switch(x) {
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case 1:
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while(({if (y) break; y;})) {} //expected-warning {{'break' is bound to loop, GCC binds it to switch}}
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}
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}
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void pr8880_21(int x, int y) {
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switch(x) {
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case 1:
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do {} while(({if (y) break; y;})); //expected-warning {{'break' is bound to loop, GCC binds it to switch}}
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}
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}
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void pr8880_22(int x, int y) {
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switch(x) {
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case 1:
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for ( ; ; (void)({ ++y; break; y;})) {} // expected-warning{{'break' is bound to loop, GCC binds it to switc}}
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}
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}
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void pr8880_23(int x, int y) {
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switch(x) {
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case 1:
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for ( ; ({ ++y; break; y;}); ++y) {} // expected-warning{{'break' is bound to loop, GCC binds it to switch}}
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}
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}
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