1// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s 2 3typedef unsigned char uint8_t; 4 5uint8_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 16uint8_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 29uint8_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 45void 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: 51void read_write_modifier1(int one, int two) { 52 long wide_two = two; 53 asm ("%w0 %1" : "+r" (one), "+r" (wide_two)); 54} 55