clang/test/Sema/inline-asm-validate-aarch64.c

   1 // RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
   2
   3 typedef unsigned char uint8_t;
   4
   5 uint8_t constraint_r(uint8_t *addr) {
   6   uint8_t byte;
   7
   8   __asm__ volatile("ldrb %0, [%1]" : "=r" (byte) : "r" (addr) : "memory");
   9 // CHECK: warning: value size does not match register size specified by the constraint and modifier
  10 // CHECK: note: use constraint modifier "w"
  11 // CHECK: fix-it:{{.*}}:{8:26-8:28}:"%w0"
  12
  13   return byte;
  14 }
  15
  16 uint8_t constraint_r_symbolic(uint8_t *addr) {
  17   uint8_t byte;
  18
  19   __asm__ volatile("ldrb %[s0], [%[s1]]" : [s0] "=r" (byte) : [s1] "r" (addr) : "memory");
  20 // CHECK: warning: value size does not match register size specified by the constraint and modifier
  21 // CHECK: note: use constraint modifier "w"
  22 // CHECK: fix-it:{{.*}}:{19:26-19:31}:"%w[s0]"
  23
  24   return byte;
  25 }
  26
  27 #define PERCENT "%"
  28
  29 uint8_t constraint_r_symbolic_macro(uint8_t *addr) {
  30   uint8_t byte;
  31
  32   __asm__ volatile("ldrb "PERCENT"[s0], [%[s1]]" : [s0] "=r" (byte) : [s1] "r" (addr) : "memory");
  33 // CHECK: warning: value size does not match register size specified by the constraint and modifier
  34 // CHECK: note: use constraint modifier "w"
  35 // CHECK-NOT: fix-it
  36
  37   return byte;
  38 }
  39
  40 // CHECK: warning: value size does not match register size specified by the constraint and modifier
  41 // CHECK: asm ("%w0 %w1 %2" : "+r" (one) : "r" (wide_two));
  42 // CHECK: note: use constraint modifier "w"
  43 // CHECK: fix-it:{{.*}}:{47:17-47:19}:"%w2"
  44
  45 void read_write_modifier0(int one, int two) {
  46   long wide_two = two;
  47   asm ("%w0 %w1 %2" : "+r" (one) : "r" (wide_two));
  48 }
  49
  50 // CHECK-NOT: warning:
  51 void read_write_modifier1(int one, int two) {
  52   long wide_two = two;
  53   asm ("%w0 %1" : "+r" (one), "+r" (wide_two));
  54 }