File: inline-asm-clobber-warning.c

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (21 lines) | stat: -rw-r--r-- 985 bytes parent folder | download | duplicates (29) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
/// This test checks that the warning includes the location in the C source
/// file that contains the inline asm. Instead of saying <inline asm> for both.
/// Although this warning is emitted in llvm it cannot be tested from IR as
/// it does not have that location information at that stage.

// RUN: %clang -target arm-arm-none-eabi -march=armv7-m -c %s -o /dev/null \
// RUN:   2>&1 | FileCheck %s

// REQUIRES: arm-registered-target

void bar(void) {
  __asm__ __volatile__("nop"
                       :
                       :
                       : "sp");
}

// CHECK:      inline-asm-clobber-warning.c:12:24: warning: inline asm clobber list contains reserved registers: SP [-Winline-asm]
// CHECK-NEXT:     __asm__ __volatile__("nop"
// CHECK-NEXT:                          ^
// CHECK-NEXT: inline-asm-clobber-warning.c:12:24: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.