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// RUN: %clang_cc1 -std=c++11 -verify %s
// Note that this puts the expected lines before the directives to work around
// limitations in the -verify mode.
void test(int *List, int Length) {
int i = 0;
#pragma unroll
while (i + 1 < Length) {
List[i] = i;
}
#pragma nounroll
while (i < Length) {
List[i] = i;
}
#pragma unroll 4
while (i - 1 < Length) {
List[i] = i;
}
#pragma unroll(8)
while (i - 2 < Length) {
List[i] = i;
}
/* expected-error {{expected ')'}} */ #pragma unroll(4
/* expected-error {{missing argument; expected an integer value}} */ #pragma unroll()
/* expected-warning {{extra tokens at end of '#pragma unroll'}} */ #pragma unroll 1 2
while (i-6 < Length) {
List[i] = i;
}
/* expected-warning {{extra tokens at end of '#pragma nounroll'}} */ #pragma nounroll 1
while (i-7 < Length) {
List[i] = i;
}
/* expected-error {{expected ')'}} */ #pragma unroll(()
/* expected-error {{expected expression}} */ #pragma unroll -
/* The values of 0 and 1 block any unrolling of the loop. */ #pragma unroll 0
/* expected-error {{value '3000000000' is too large}} */ #pragma unroll(3000000000)
/* expected-error {{value '3000000000' is too large}} */ #pragma unroll 3000000000
while (i-8 < Length) {
List[i] = i;
}
/* The values of 0 and 1 block any unrolling of the loop. */ #pragma unroll(0)
while (i-8 < Length) {
List[i] = i;
}
#pragma unroll
/* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll'}} */ int j = Length;
#pragma unroll 4
/* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll'}} */ int k = Length;
#pragma nounroll
/* expected-error {{expected a for, while, or do-while loop to follow '#pragma nounroll'}} */ int l = Length;
switch (i) {
case 1:
#pragma unroll
/* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll'}} */ [[fallthrough]];
case 2:
for (int i = 0; i < 10; ++i);
break;
}
#pragma unroll 4
/* expected-error {{incompatible directives 'unroll(disable)' and '#pragma unroll(4)'}} */ #pragma clang loop unroll(disable)
while (i-10 < Length) {
List[i] = i;
}
#pragma unroll(4)
/* expected-error {{incompatible directives 'unroll(full)' and '#pragma unroll(4)'}} */ #pragma clang loop unroll(full)
while (i-11 < Length) {
List[i] = i;
}
#pragma unroll(4)
/* expected-error {{incompatible directives 'unroll(enable)' and '#pragma unroll(4)'}} */ #pragma clang loop unroll(enable)
while (i-11 < Length) {
List[i] = i;
}
#pragma unroll(4)
/* expected-error {{incompatible directives '#pragma unroll' and '#pragma unroll(4)'}} */ #pragma unroll
while (i-11 < Length) {
List[i] = i;
}
#pragma clang loop unroll_count(4)
/* expected-error {{incompatible directives '#pragma nounroll' and 'unroll_count(4)'}} */ #pragma nounroll
while (i-12 < Length) {
List[i] = i;
}
#pragma nounroll
/* expected-error {{duplicate directives '#pragma nounroll' and '#pragma nounroll'}} */ #pragma nounroll
while (i-13 < Length) {
List[i] = i;
}
#pragma unroll
/* expected-error {{duplicate directives '#pragma unroll' and '#pragma unroll'}} */ #pragma unroll
while (i-14 < Length) {
List[i] = i;
}
#pragma unroll
/* expected-error {{duplicate directives '#pragma unroll' and 'unroll(full)'}} */ #pragma clang loop unroll(full)
while (i-15 < Length) {
List[i] = i;
}
#pragma unroll 4
/* expected-error {{duplicate directives '#pragma unroll(4)' and '#pragma unroll(4)'}} */ #pragma unroll(4)
while (i-16 < Length) {
List[i] = i;
}
#pragma unroll
/* expected-error {{expected statement}} */ }
using size_t = unsigned long long;
template <bool Flag>
int FailToBuild(int n) {
constexpr int N = 100;
auto init = [=]() { return Flag ? n : 0UL; };
auto cond = [=](size_t ix) { return Flag ? ix != 0 : ix < 10; };
auto iter = [=](size_t ix) {
return Flag ? ix & ~(1ULL << __builtin_clzll(ix)) : ix + 1;
};
#pragma unroll Flag ? 0 : N // Ok, allow 0.
for (size_t ix = init(); cond(ix); ix = iter(ix)) {
n *= n;
}
#pragma GCC unroll Flag ? 0 : N // Ok, allow 0.
for (size_t ix = init(); cond(ix); ix = iter(ix)) {
n *= n;
}
return n;
}
int foo(int n) {
return FailToBuild<true>(n);
}
int bar(int n) {
return FailToBuild<false>(n);
}
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