Extend builtin "attribute" syntax to include a notation for
printf-like functions, both builtin functions and those in the
C library. The function-call checker now queries this attribute do
determine if we have a printf-like function, rather than scanning
through the list of "known functions IDs". However, there are 5
functions they are not yet "builtins", so the function-call checker
handles them specifically still:
- fprintf and vfprintf: the builtins mechanism cannot (yet)
express FILE* arguments, so these can't be encoded.
- NSLog: the builtins mechanism cannot (yet) express NSString*
arguments, so this (and NSLogv) can't be encoded.
- asprintf and vasprintf: these aren't part of the C99 standard
library, so we really shouldn't be defining them as builtins in
the general case (and we don't seem to have the machinery to make
them builtins only on certain targets and depending on whether
extensions are enabled).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64512 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/dead-stores.c b/test/Analysis/dead-stores.c
index 7d7b369..2d07a80 100644
--- a/test/Analysis/dead-stores.c
+++ b/test/Analysis/dead-stores.c
@@ -12,7 +12,8 @@
void f2(void *b) {
char *c = (char*)b; // no-warning
char *d = b+1; // expected-warning {{never read}}
- printf("%s", c);
+ printf("%s", c); // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+ // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
}
void f3() {
diff --git a/test/Analysis/uninit-vals.c b/test/Analysis/uninit-vals.c
index a7f5733..2f2c33d 100644
--- a/test/Analysis/uninit-vals.c
+++ b/test/Analysis/uninit-vals.c
@@ -31,7 +31,9 @@
void f6(int i) {
int x;
for (i = 0 ; i < 10; i++)
- printf("%d",x++); // expected-warning {{use of uninitialized variable}}
+ printf("%d",x++); // expected-warning {{use of uninitialized variable}} \
+ // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+ // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
}
void f7(int i) {
diff --git a/test/Rewriter/finally.m b/test/Rewriter/finally.m
index 903cdec..0d623dc 100644
--- a/test/Rewriter/finally.m
+++ b/test/Rewriter/finally.m
@@ -2,7 +2,8 @@
int main() {
@try {
- printf("executing try");
+ printf("executing try"); // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+ // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
return(0); // expected-warning{{rewriter doesn't support user-specified control flow semantics for @try/@finally (code may not execute properly)}}
} @finally {
printf("executing finally");
diff --git a/test/Sema/block-return.c b/test/Sema/block-return.c
index 64c2993..a370534 100644
--- a/test/Sema/block-return.c
+++ b/test/Sema/block-return.c
@@ -80,5 +80,6 @@
int (^xx)(const char *s) = ^(char *s) { return 1; }; // expected-warning {{incompatible block pointer types initializing 'int (^)(char *)', expected 'int (^)(char const *)'}}
int (*yy)(const char *s) = funk; // expected-warning {{incompatible pointer types initializing 'int (char *)', expected 'int (*)(char const *)'}}
- int (^nested)(char *s) = ^(char *str) { void (^nest)(void) = ^(void) { printf("%s\n", str); }; next(); return 1; };
+ int (^nested)(char *s) = ^(char *str) { void (^nest)(void) = ^(void) { printf("%s\n", str); }; next(); return 1; }; // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+ // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
}