clang/test/CodeGen/bpf-inline-asm.c

   1 // REQUIRES: bpf-registered-target
   2 // RUN: %clang_cc1 -triple bpf -emit-llvm -target-feature +alu32 %s -o - | FileCheck %s
   3 // RUN: %clang_cc1 -triple bpf -emit-llvm -target-cpu v3 %s -o - | FileCheck %s
   4
   5 void test_generic_constraints(int var32, long var64) {
   6   asm("%0 = %1"
   7       : "=r"(var32)
   8       : "0"(var32));
   9   // CHECK: [[R32_ARG:%[a-zA-Z0-9]+]] = load i32, ptr
  10   // CHECK: call i32 asm "$0 = $1", "=r,0"(i32 [[R32_ARG]])
  11
  12   asm("%0 = %1"
  13       : "=r"(var64)
  14       : "0"(var64));
  15   // CHECK: [[R64_ARG:%[a-zA-Z0-9]+]] = load i64, ptr
  16   // CHECK: call i64 asm "$0 = $1", "=r,0"(i64 [[R64_ARG]])
  17
  18   asm("%0 = %1"
  19       : "=r"(var64)
  20       : "r"(var64));
  21   // CHECK: [[R64_ARG:%[a-zA-Z0-9]+]] = load i64, ptr
  22   // CHECK: call i64 asm "$0 = $1", "=r,r"(i64 [[R64_ARG]])
  23 }
  24
  25 void test_constraint_w(int a) {
  26   asm("%0 = %1"
  27       : "=w"(a)
  28       : "w"(a));
  29   // CHECK: [[R32_ARG:%[a-zA-Z0-9]+]] = load i32, ptr
  30   // CHECK: call i32 asm "$0 = $1", "=w,w"(i32 [[R32_ARG]])
  31 }