asm.c revision 1eb4433ac451dc16f4133a88af2d002ac26c58ef
1// RUN: clang-cc -triple i386-unknown-unknown -emit-llvm %s -o %t && 2void t1(int len) { 3 __asm__ volatile("" : "=&r"(len), "+&r"(len)); 4} 5 6void t2(unsigned long long t) { 7 __asm__ volatile("" : "+m"(t)); 8} 9 10void t3(unsigned char *src, unsigned long long temp) { 11 __asm__ volatile("" : "+m"(temp), "+r"(src)); 12} 13 14void t4() { 15 unsigned long long a; 16 struct reg { unsigned long long a, b; } b; 17 18 __asm__ volatile ("":: "m"(a), "m"(b)); 19} 20 21// PR3417 22void t5(int i) { 23 asm("nop" : "=r"(i) : "0"(t5)); 24} 25 26// PR3641 27void t6(void) { 28 __asm__ volatile("" : : "i" (t6)); 29} 30 31// RUN: grep "T7 NAMED: \$1" %t && 32void t7(int a) { 33 __asm__ volatile("T7 NAMED: %[input]" : "+r"(a): [input] "i" (4)); 34} 35 36// RUN: grep "T8 NAMED MODIFIER: \${0:c}" %t && 37void t8() { 38 __asm__ volatile("T8 NAMED MODIFIER: %c[input]" :: [input] "i" (4)); 39} 40 41// PR3682 42unsigned t9(unsigned int a) { 43 asm("bswap %0 %1" : "+r" (a)); 44 return a; 45} 46 47// PR3908 48// RUN: grep "PR3908 \$1 \$3 \$2 \$0" %t 49void t10(int r) { 50 __asm__("PR3908 %[lf] %[xx] %[li] %[r]" : [r] "+r" (r) : [lf] "mx" (0), [li] "mr" (0), [xx] "x" ((double)(0))); 51} 52 53 54// PR3373 55unsigned t11(signed char input) { 56 unsigned output; 57 __asm__("xyz" 58 : "=a" (output) 59 : "0" (input)); 60 return output; 61} 62 63// PR3373 64unsigned char t12(unsigned input) { 65 unsigned char output; 66 __asm__("xyz" 67 : "=a" (output) 68 : "0" (input)); 69 return output; 70} 71 72unsigned char t13(unsigned input) { 73 unsigned char output; 74 __asm__("xyz %1" 75 : "=a" (output) 76 : "0" (input)); 77 return output; 78} 79 80struct large { 81 int x[1000]; 82}; 83 84unsigned long t15(int x, struct large *P) { 85 __asm__("xyz " 86 : "=r" (x) 87 : "m" (*P), "0" (x)); 88 return x; 89} 90 91 92 93 94// bitfield destination of an asm. 95struct S { 96 int a : 4; 97}; 98 99void t14(struct S *P) { 100 __asm__("abc %0" : "=r"(P->a) ); 101} 102 103 104