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1// When entry values are emitted, expect a subprogram for extern decls so that2// the dwarf generator can describe call site parameters at extern call sites.3//4// Initial implementation relied on the 'retainedTypes:' from the corresponding5// DICompileUnit, so we also ensure that we do not store the extern declaration6// subprogram into the 'retainedTypes:'.7//8// RUN: %clang -g -O2 -target x86_64-none-linux-gnu -S -emit-llvm %s -o - \9// RUN: | FileCheck %s -check-prefix=DECLS-FOR-EXTERN10 11// Similarly, when the debugger tuning is gdb, expect a subprogram for extern12// decls so that the dwarf generator can describe information needed for tail13// call frame reconstrution.14//15// RUN: %clang -gdwarf-4 -O2 -target x86_64-none-linux-gnu -ggdb -S -emit-llvm %s -o - \16// RUN: | FileCheck %s -check-prefix=DECLS-FOR-EXTERN17//18// Do not emit a subprogram for extern decls when entry values are disabled and19// the tuning is not set to gdb.20//21// RUN: %clang -gdwarf-4 -O2 -target x86_64-none-linux-gnu -gsce -S -emit-llvm %s -o - \22// RUN: | FileCheck %s -check-prefix=NO-DECLS-FOR-EXTERN23 24// DECLS-FOR-EXTERN-NOT: !DICompileUnit({{.*}}retainedTypes: !{{[0-9]+}}25// DECLS-FOR-EXTERN: [[INT_TYPE:![0-9]+]] = !DIBasicType(name: "int",26// DECLS-FOR-EXTERN: !DISubprogram(name: "fn1"27// DECLS-FOR-EXTERN-SAME: type: [[FN1_TYPE:![0-9]+]],28// DECLS-FOR-EXTERN: [[FN1_TYPE]] = !DISubroutineType(types: [[FN1_TYPES:![0-9]+]])29// DECLS-FOR-EXTERN: [[FN1_TYPES]] = !{[[X_TYPE:![0-9]+]],30// DECLS-FOR-EXTERN: [[X_TYPE]] = !DIDerivedType(tag: DW_TAG_typedef, name: "x",31// DECLS-FOR-EXTERN-SAME: baseType: [[INT_TYPE]])32// DECLS-FOR-EXTERN: !DISubprogram(name: "memcmp"33// DECLS-FOR-EXTERN: !DISubprogram(name: "__some_reserved_name"34 35// NO-DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "fn1"36// NO-DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "memcmp"37// NO-DECLS-FOR-EXTERN-NOT: !DISubprogram(name: "__some_reserved_name"38 39typedef int x;40extern x fn1(int a, int b);41extern int memcmp(const void *s1, const void *s2, unsigned long n);42extern void __some_reserved_name(void);43 44int fn2 (int *src, int *dst) {45 int x = 4, y = 5;46 int res = fn1(x, y);47 int res2 = memcmp(dst, src, res);48 __some_reserved_name();49 return res + res2;50}51 52