1 // When entry values are emitted, expect a subprogram for extern decls so that 2 // the dwarf generator can describe call site parameters at extern call sites. 3 // 4 // RUN: %clang -Xclang -femit-debug-entry-values -g -O2 -target x86_64-none-linux-gnu -S -emit-llvm %s -o - \ 5 // RUN: | FileCheck %s -check-prefix=DECLS-FOR-EXTERN 6 7 // Similarly, when the debugger tuning is gdb, expect a subprogram for extern 8 // decls so that the dwarf generator can describe information needed for tail 9 // call frame reconstrution. 10 // 11 // RUN: %clang -g -O2 -target x86_64-none-linux-gnu -ggdb -S -emit-llvm %s -o - \ 12 // RUN: | FileCheck %s -check-prefix=DECLS-FOR-EXTERN 13 // 14 // Do not emit a subprogram for extern decls when entry values are disabled and 15 // the tuning is not set to gdb. 16 // 17 // RUN: %clang -g -O2 -target x86_64-none-linux-gnu -gsce -S -emit-llvm %s -o - \ 18 // RUN: | FileCheck %s -check-prefix=NO-DECLS-FOR-EXTERN 19 20 // DECLS-FOR-EXTERN: !DISubprogram(name: "fn1" 21 // DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "memcmp" 22 // DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "__some_reserved_name" 23 24 // NO-DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "fn1" 25 // NO-DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "memcmp" 26 // NO-DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "__some_reserved_name" 27 28 extern int fn1(int a, int b); 29 extern int memcmp(const void *s1, const void *s2, unsigned long n); 30 extern void __some_reserved_name(void); 31 32 int fn2 (int *src, int *dst) { 33 int x = 4, y = 5; 34 int res = fn1(x, y); 35 int res2 = memcmp(dst, src, res); 36 __some_reserved_name(); 37 return res + res2; 38 } 39 40