552c6c2328
Old GCC used to aggressively fold VLAs to constant-bound arrays at block scope in GNU mode. That's non-conforming, and more modern versions of GCC only do this at file scope. Update Clang to do the same. Also promote the warning for this from off-by-default to on-by-default in all cases; more recent versions of GCC likewise warn on this by default. This is still slightly more permissive than GCC, as pointed out in PR44406, as we still fold VLAs to constant arrays in structs, but that seems justifiable given that we don't support VLA-in-struct (and don't intend to ever support it), but GCC does. Differential Revision: https://reviews.llvm.org/D89523
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
// RUN: %clang_cc1 %s -verify -fsyntax-only
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void a() {
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__complex__ int arr;
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__complex__ short brr;
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__complex__ unsigned xx;
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__complex__ signed yy;
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__complex__ int result;
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int ii;
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int aa = 1 + 1.0iF;
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int bb = 0;
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bb += 1i;
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result = arr*ii;
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result = ii*brr;
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result = arr*brr;
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result = xx*yy;
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switch (arr) { // expected-error{{statement requires expression of integer type ('_Complex int' invalid)}}
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case brr: ;
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case xx: ;
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}
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switch (ii) {
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case brr: ; // expected-error{{integer constant expression must have integer type}}
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case xx: ; // expected-error{{integer constant expression must have integer type}}
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}
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}
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void Tester() {
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__complex short a1;
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__complex int a2;
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__complex float a3;
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__complex double a4;
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short a5;
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int a6;
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float a7;
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double a8;
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#define TestPair(m,n) int x##m##n = a##m+a##n;
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#define TestPairs(m) TestPair(m,1) TestPair(m,2) \
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TestPair(m,3) TestPair(m,4) \
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TestPair(m,5) TestPair(m,6) \
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TestPair(m,7) TestPair(m,8)
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TestPairs(1); TestPairs(2);
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TestPairs(3); TestPairs(4);
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TestPairs(5); TestPairs(6);
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TestPairs(7); TestPairs(8);
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}
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// rdar://6097730
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void test3(_Complex int *x) {
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*x = ~*x;
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}
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void test4(_Complex float *x) {
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*x = ~*x;
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}
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void test5(_Complex int *x) {
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(*x)++;
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}
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// None of these array bounds is an ICE due to the use of literals of
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// non-integer type. But we can constant-fold all of them.
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int i1[(2+3i)*(5+7i) == 29i-11 ? 1 : -1]; // expected-warning {{fold}}
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int i2[(29i-11)/(5+7i) == 2+3i ? 1 : -1]; // expected-warning {{fold}}
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int i3[-(2+3i) == +(-3i-2) ? 1 : -1]; // expected-warning {{fold}}
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int i4[~(2+3i) == 2-3i ? 1 : -1]; // expected-warning {{fold}}
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int i5[(3i == -(-3i) ? ((void)3, 1i - 1) : 0) == 1i - 1 ? 1 : -1]; // expected-warning {{fold}}
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int f1[(2.0+3.0i)*(5.0+7.0i) == 29.0i-11.0 ? 1 : -1]; // expected-warning {{fold}}
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int f2[(29.0i-11.0)/(5.0+7.0i) == 2.0+3.0i ? 1 : -1]; // expected-warning {{fold}}
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int f3[-(2.0+3.0i) == +(-3.0i-2.0) ? 1 : -1]; // expected-warning {{fold}}
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int f4[~(2.0+3.0i) == 2.0-3.0i ? 1 : -1]; // expected-warning {{fold}}
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int f5[(3.0i == -(-3.0i) ? ((void)3.0, __extension__ (1.0i - 1.0)) : 0) == 1.0i - 1.0 ? 1 : -1]; // expected-warning {{fold}}
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