clang/test/CodeGen/arm-asm-variable.c

   1 // REQUIRES: arm-registered-target
   2 // RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -w -o - %s | FileCheck %s
   3
   4 typedef long long int64_t;
   5 typedef unsigned int uint32_t;
   6
   7 int64_t foo(int64_t v, volatile int64_t *p)
   8 {
   9   register uint32_t rl asm("r1");
  10   register uint32_t rh asm("r2");
  11
  12   int64_t r;
  13   uint32_t t;
  14
  15   __asm__ __volatile__(                                                 \
  16                        "ldrexd%[_rl], %[_rh], [%[_p]]"                  \
  17                        : [_rl] "=&r" (rl), [_rh] "=&r" (rh)             \
  18                        : [_p] "p" (p) : "memory");
  19
  20   // CHECK: call { i32, i32 } asm sideeffect "ldrexd$0, $1, [$2]", "=&{r1},=&{r2},r,~{memory}"(ptr
  21
  22   return r;
  23 }
  24
  25 // Make sure we translate register names properly.
  26 void bar (void) {
  27   register unsigned int rn asm("r14");
  28   register unsigned int d asm("r2");
  29
  30   // CHECK: call i32 asm sideeffect "sub $1, $1, #32", "={r2},{lr}"
  31   asm volatile ("sub %1, %1, #32" : "=r"(d) : "r"(rn));
  32 }