xref: /llvm-project/clang/test/Misc/inline-asm-clobber-warning.c (revision 2db090a2ebd76f120bfae4fbe4b7241667aa585e) 
1*2db090a2SDavid Spickett /// This test checks that the warning includes the location in the C source
2*2db090a2SDavid Spickett /// file that contains the inline asm. Instead of saying <inline asm> for both.
3*2db090a2SDavid Spickett /// Although this warning is emitted in llvm it cannot be tested from IR as
4*2db090a2SDavid Spickett /// it does not have that location information at that stage.
5*2db090a2SDavid Spickett 
6*2db090a2SDavid Spickett // RUN: %clang -target arm-arm-none-eabi -march=armv7-m -c %s -o /dev/null \
7*2db090a2SDavid Spickett // RUN:   2>&1 | FileCheck %s
8*2db090a2SDavid Spickett 
9*2db090a2SDavid Spickett // REQUIRES: arm-registered-target
10*2db090a2SDavid Spickett 
bar(void)11*2db090a2SDavid Spickett void bar(void) {
12*2db090a2SDavid Spickett   __asm__ __volatile__("nop"
13*2db090a2SDavid Spickett                        :
14*2db090a2SDavid Spickett                        :
15*2db090a2SDavid Spickett                        : "sp");
16*2db090a2SDavid Spickett }
17*2db090a2SDavid Spickett 
18*2db090a2SDavid Spickett // CHECK:      inline-asm-clobber-warning.c:12:24: warning: inline asm clobber list contains reserved registers: SP [-Winline-asm]
19*2db090a2SDavid Spickett // CHECK-NEXT:     __asm__ __volatile__("nop"
20*2db090a2SDavid Spickett // CHECK-NEXT:                          ^
21*2db090a2SDavid Spickett // 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.
22