27 lines · c
1// RUN: %clang_cc1 -triple mipsel-unknown-linux -o - -emit-llvm %s \2// RUN: | FileCheck %s3 4// This checks that the frontend will accept inline asm memory constraints.5 6int foo(void)7{8 9 // 'R': An address that can be used in a non-macro load or stor'10 // This test will result in the higher and lower nibbles being11 // switched due to the lwl/lwr instruction pairs.12 // CHECK: %{{[0-9]+}} = call i32 asm sideeffect "lwl $0, 1 + $1\0A\09lwr $0, 2 + $1\0A\09", "=r,*R,~{$1}"(ptr elementtype(i32) %{{[0-9,a-f]+}}) #1,13 14 int c = 0xffbbccdd;15 16 int *p = &c;17 int out = 0;18 19 __asm volatile (20 "lwl %0, 1 + %1\n\t"21 "lwr %0, 2 + %1\n\t"22 : "=r"(out)23 : "R"(*p)24 );25 return 0;26}27