clang/test/Misc/ppc-inline-asm-clobber-warning.c

   1 /// This test checks that the warning includes the location in the C source
   2 /// file that contains the inline asm. Although this warning is emitted in llvm
   3 /// it cannot be tested from IR as it does not have that location information at
   4 /// that stage.
   5
   6 // REQUIRES: powerpc-registered-target
   7
   8 // RUN: %clang --target=powerpc-unknown-unknown -mcpu=pwr7 \
   9 // RUN:   -c %s -o /dev/null 2>&1 | FileCheck %s
  10 // RUN: %clang --target=powerpc64-unknown-unknown -mcpu=pwr7 \
  11 // RUN:   -c %s -o /dev/null 2>&1 | FileCheck %s
  12
  13 void test_r1_clobber() {
  14   __asm__("nop":::"r1");
  15 }
  16
  17 // CHECK:      ppc-inline-asm-clobber-warning.c:14:11: warning: inline asm clobber list contains reserved registers: R1 [-Winline-asm]
  18 // CHECK-NEXT:   __asm__("nop":::"r1");
  19 // CHECK-NEXT:           ^
  20 // CHECK-NEXT: ppc-inline-asm-clobber-warning.c:14:11: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
  21
  22 void test_1_clobber() {
  23   __asm__("nop":::"1");
  24 }
  25
  26 // CHECK:      ppc-inline-asm-clobber-warning.c:23:11: warning: inline asm clobber list contains reserved registers: R1 [-Winline-asm]
  27 // CHECK-NEXT:   __asm__("nop":::"1");
  28 // CHECK-NEXT:           ^
  29 // CHECK-NEXT: ppc-inline-asm-clobber-warning.c:23:11: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
  30
  31 void test_sp_clobber() {
  32   __asm__("nop":::"sp");
  33 }
  34
  35 // CHECK:      ppc-inline-asm-clobber-warning.c:32:11: warning: inline asm clobber list contains reserved registers: R1 [-Winline-asm]
  36 // CHECK-NEXT:   __asm__("nop":::"sp");
  37 // CHECK-NEXT:           ^
  38 // CHECK-NEXT: ppc-inline-asm-clobber-warning.c:32:11: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.