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Last change
on this file since 5db913f was 81e768d, checked in by Michael Brooks <mlbrooks@…>, 11 months ago |
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Fix #276; add support for c-array parameters using dependent lengths.
Without this fix, declarations like
void f( int m, int n, float[m][n] );
would either
- generate bad C code, with unmangled variable names appearing in the function definition, or
- refuse to resolve a valid-c call of such a function.
tests/array-collections/c-dependent: add direct tests of such cases
tests/tuplearray: activate and expand cases which were blocked on #276
tests/array: activate case fm5y, which was blocked on #276; [noise] adjust source line numbers in .expect
tests/typedefRedef: expand coverage of "error, an array detail is different" cases; [noise] adjust source line numbers in .expect
tests/functions: [noise] adjust .expect to have resolved array sizes (extra casts) in the diffed code dump
The fix is:
- (ResolvExpr/ResolveTypeof, ResolvExpr/Resolver) Resolve the dimension expressions, where they were missed.
- (ResolvExpr/Resolver) Prevent dimension expressions that are bound to other parameters from escaping in the function's type, to where they are out of scope. In the f example above, redact the type shown to callers from
void (*)(int, int, float[m][n]) to void (*)(int, int, float[][*]).
- (ResolvExpr/Unify) Relax the matching rules for such a type, when used at a call site, letting the patameters wildcard type match with the concrete type in scope at the caller's side.
- (Validate/ReplaceTypedef) Apply the former, stricter matching rules to the one place where they are still needed: detecting inconsistent typedefs.
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Property mode
set to
100644
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File size:
861 bytes
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| 1 | void iota1( int n, float * a, float base ) {
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| 2 | for (i; n) {
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| 3 | a[i] = base + 0.1f * (float)(i + 1);
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| 4 | }
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| 5 | }
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| 6 |
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| 7 | void f__bound_ptr_allow( int n, float a[n] ) {
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| 8 | printf( "bound_ptr_allow %d: %.1f %.1f %.1f\n", n, a[0], a[1], a[2] );
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| 9 | }
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| 10 | void bound_ptr_allow() {
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| 11 | float a[42];
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| 12 | iota1( 42, a, 1.0 );
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| 13 | f__bound_ptr_allow( 999, a );
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| 14 | }
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| 15 |
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| 16 | void f__bound_ar_allow( int n, float a[][n + 1] ) {
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| 17 | printf( "bound_ar_allow %d:\n", n );
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| 18 | printf( "%.1f %.1f %.1f\n", a[0][0], a[0][1], a[0][2] );
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| 19 | printf( "%.1f %.1f %.1f\n", a[1][0], a[1][1], a[1][2] );
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| 20 | printf( "%.1f %.1f %.1f\n", a[2][0], a[2][1], a[2][2] );
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| 21 | }
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| 22 | void bound_ar_allow() {
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| 23 | float a[3][42];
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| 24 | iota1( 42, a[0], 1.0 );
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| 25 | iota1( 42, a[1], 2.0 );
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| 26 | iota1( 42, a[2], 3.0 );
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| 27 | f__bound_ar_allow( 41, a );
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| 28 | }
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| 29 |
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| 30 |
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| 31 | int main() {
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| 32 | bound_ptr_allow();
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| 33 | bound_ar_allow();
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| 34 |
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| 35 | return 0;
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| 36 | }
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