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 
constraint_r(uint8_t * addr)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 
constraint_r_symbolic(uint8_t * addr)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 
constraint_r_symbolic_macro(uint8_t * addr)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 
read_write_modifier0(int one,int two)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:
read_write_modifier1(int one,int two)51 void read_write_modifier1(int one, int two) {
52   long wide_two = two;
53   asm ("%w0 %1" : "+r" (one), "+r" (wide_two));
54 }
55