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// RUN: %clang %s -emit-llvm %O0opt -c -o %t.bc
// RUN: rm -rf %t.klee-out
// RUN: %klee --output-dir=%t.klee-out %t.bc | FileCheck %s
#include <stdarg.h>
#include <assert.h>
#include <stdio.h>
void ld_after_zero(int first,...)
{
va_list ap;
long double dub;
va_start(ap, first);
while (va_arg(ap, int) != 0)
;
dub = va_arg(ap, long double);
printf("%Lf\n", dub);
}
int main() {
long double dub = 1.123456;
int zero = 0;
int one = 1;
// AMD64-ABI 3.5.7p5: Step 7. Align l->overflow_arg_area upwards to a 16
// byte boundary if alignment needed by type exceeds 8 byte boundary.
//
// the long double dub requires 16 byte alignment.
// we try passing one,zero and one, one, zero
// at least on those will align dub such that it needs the extra alignment
ld_after_zero(one, zero, dub);
// CHECK: 1.123456
ld_after_zero(one, one, zero, dub);
// CHECK-NEXT: 1.123456
return 0;
}
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