Initial check in
Bug: 137197907
diff --git a/src/llvm-project/clang/test/Sema/compare.c b/src/llvm-project/clang/test/Sema/compare.c
new file mode 100644
index 0000000..b2b486f
--- /dev/null
+++ b/src/llvm-project/clang/test/Sema/compare.c
@@ -0,0 +1,406 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -pedantic -verify -Wsign-compare -Wtautological-constant-in-range-compare %s -Wno-unreachable-code
+
+int test(char *C) { // nothing here should warn.
+ return C != ((void*)0);
+ return C != (void*)0;
+ return C != 0;
+ return C != 1; // expected-warning {{comparison between pointer and integer ('char *' and 'int')}}
+}
+
+int ints(long a, unsigned long b) {
+ enum EnumA {A};
+ enum EnumB {B};
+ enum EnumC {C = 0x10000};
+ return
+ // (a,b)
+ (a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ (a == (unsigned int) b) +
+ (a == (unsigned short) b) +
+ (a == (unsigned char) b) +
+ ((long) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a == (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a == (unsigned short) b) +
+ ((signed char) a == (unsigned char) b) +
+ (a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) b) +
+ (a < (unsigned short) b) +
+ (a < (unsigned char) b) +
+ ((long) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) b) +
+ ((signed char) a < (unsigned char) b) +
+
+ // (A,b)
+ (A == (unsigned long) b) +
+ (A == (unsigned int) b) +
+ (A == (unsigned short) b) +
+ (A == (unsigned char) b) +
+ ((long) A == b) +
+ ((int) A == b) +
+ ((short) A == b) +
+ ((signed char) A == b) +
+ ((long) A == (unsigned long) b) +
+ ((int) A == (unsigned int) b) +
+ ((short) A == (unsigned short) b) +
+ ((signed char) A == (unsigned char) b) +
+ (A < (unsigned long) b) +
+ (A < (unsigned int) b) +
+ (A < (unsigned short) b) +
+ (A < (unsigned char) b) +
+ ((long) A < b) +
+ ((int) A < b) +
+ ((short) A < b) +
+ ((signed char) A < b) +
+ ((long) A < (unsigned long) b) +
+ ((int) A < (unsigned int) b) +
+ ((short) A < (unsigned short) b) +
+ ((signed char) A < (unsigned char) b) +
+
+ // (a,B)
+ (a == (unsigned long) B) +
+ (a == (unsigned int) B) +
+ (a == (unsigned short) B) +
+ (a == (unsigned char) B) +
+ ((long) a == B) +
+ ((int) a == B) +
+ ((short) a == B) +
+ ((signed char) a == B) +
+ ((long) a == (unsigned long) B) +
+ ((int) a == (unsigned int) B) +
+ ((short) a == (unsigned short) B) +
+ ((signed char) a == (unsigned char) B) +
+ (a < (unsigned long) B) + // expected-warning {{comparison of unsigned expression < 0 is always false}}
+ (a < (unsigned int) B) +
+ (a < (unsigned short) B) +
+ (a < (unsigned char) B) +
+ ((long) a < B) +
+ ((int) a < B) +
+ ((short) a < B) +
+ ((signed char) a < B) +
+ ((long) a < (unsigned long) B) + // expected-warning {{comparison of unsigned expression < 0 is always false}}
+ ((int) a < (unsigned int) B) + // expected-warning {{comparison of unsigned expression < 0 is always false}}
+ ((short) a < (unsigned short) B) +
+ ((signed char) a < (unsigned char) B) +
+
+ // (C,b)
+ (C == (unsigned long) b) +
+ (C == (unsigned int) b) +
+ (C == (unsigned short) b) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'unsigned short' is always false}}
+ (C == (unsigned char) b) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'unsigned char' is always false}}
+ ((long) C == b) +
+ ((int) C == b) +
+ ((short) C == b) +
+ ((signed char) C == b) +
+ ((long) C == (unsigned long) b) +
+ ((int) C == (unsigned int) b) +
+ ((short) C == (unsigned short) b) +
+ ((signed char) C == (unsigned char) b) +
+ (C < (unsigned long) b) +
+ (C < (unsigned int) b) +
+ (C < (unsigned short) b) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'unsigned short' is always false}}
+ (C < (unsigned char) b) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'unsigned char' is always false}}
+ ((long) C < b) +
+ ((int) C < b) +
+ ((short) C < b) +
+ ((signed char) C < b) +
+ ((long) C < (unsigned long) b) +
+ ((int) C < (unsigned int) b) +
+ ((short) C < (unsigned short) b) +
+ ((signed char) C < (unsigned char) b) +
+
+ // (a,C)
+ (a == (unsigned long) C) +
+ (a == (unsigned int) C) +
+ (a == (unsigned short) C) +
+ (a == (unsigned char) C) +
+ ((long) a == C) +
+ ((int) a == C) +
+ ((short) a == C) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'short' is always false}}
+ ((signed char) a == C) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'signed char' is always false}}
+ ((long) a == (unsigned long) C) +
+ ((int) a == (unsigned int) C) +
+ ((short) a == (unsigned short) C) +
+ ((signed char) a == (unsigned char) C) +
+ (a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) C) +
+ (a < (unsigned short) C) +
+ (a < (unsigned char) C) +
+ ((long) a < C) +
+ ((int) a < C) +
+ ((short) a < C) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'short' is always true}}
+ ((signed char) a < C) + // expected-warning {{comparison of constant 'C' (65536) with expression of type 'signed char' is always true}}
+ ((long) a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) C) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) C) +
+ ((signed char) a < (unsigned char) C) +
+
+ // (0x80000,b)
+ (0x80000 == (unsigned long) b) +
+ (0x80000 == (unsigned int) b) +
+ (0x80000 == (unsigned short) b) + // expected-warning {{comparison of constant 524288 with expression of type 'unsigned short' is always false}}
+ (0x80000 == (unsigned char) b) + // expected-warning {{comparison of constant 524288 with expression of type 'unsigned char' is always false}}
+ ((long) 0x80000 == b) +
+ ((int) 0x80000 == b) +
+ ((short) 0x80000 == b) +
+ ((signed char) 0x80000 == b) +
+ ((long) 0x80000 == (unsigned long) b) +
+ ((int) 0x80000 == (unsigned int) b) +
+ ((short) 0x80000 == (unsigned short) b) +
+ ((signed char) 0x80000 == (unsigned char) b) +
+ (0x80000 < (unsigned long) b) +
+ (0x80000 < (unsigned int) b) +
+ (0x80000 < (unsigned short) b) + // expected-warning {{comparison of constant 524288 with expression of type 'unsigned short' is always false}}
+ (0x80000 < (unsigned char) b) + // expected-warning {{comparison of constant 524288 with expression of type 'unsigned char' is always false}}
+ ((long) 0x80000 < b) +
+ ((int) 0x80000 < b) +
+ ((short) 0x80000 < b) +
+ ((signed char) 0x80000 < b) +
+ ((long) 0x80000 < (unsigned long) b) +
+ ((int) 0x80000 < (unsigned int) b) +
+ ((short) 0x80000 < (unsigned short) b) +
+ ((signed char) 0x80000 < (unsigned char) b) +
+
+ // (a,0x80000)
+ (a == (unsigned long) 0x80000) +
+ (a == (unsigned int) 0x80000) +
+ (a == (unsigned short) 0x80000) +
+ (a == (unsigned char) 0x80000) +
+ ((long) a == 0x80000) +
+ ((int) a == 0x80000) +
+ ((short) a == 0x80000) + // expected-warning {{comparison of constant 524288 with expression of type 'short' is always false}}
+ ((signed char) a == 0x80000) + // expected-warning {{comparison of constant 524288 with expression of type 'signed char' is always false}}
+ ((long) a == (unsigned long) 0x80000) +
+ ((int) a == (unsigned int) 0x80000) +
+ ((short) a == (unsigned short) 0x80000) +
+ ((signed char) a == (unsigned char) 0x80000) +
+ (a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) 0x80000) +
+ (a < (unsigned short) 0x80000) +
+ (a < (unsigned char) 0x80000) +
+ ((long) a < 0x80000) +
+ ((int) a < 0x80000) +
+ ((short) a < 0x80000) + // expected-warning {{comparison of constant 524288 with expression of type 'short' is always true}}
+ ((signed char) a < 0x80000) + // expected-warning {{comparison of constant 524288 with expression of type 'signed char' is always true}}
+ ((long) a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) 0x80000) +
+ ((signed char) a < (unsigned char) 0x80000) +
+
+ // We should be able to avoid warning about this.
+ (b != (a < 4 ? 1 : 2)) +
+
+ 10
+ ;
+}
+
+int equal(char *a, const char *b) {
+ return a == b;
+}
+
+int arrays(char (*a)[5], char(*b)[10], char(*c)[5]) {
+ int d = (a == c);
+ return a == b; // expected-warning {{comparison of distinct pointer types}}
+}
+
+int pointers(int *a) {
+ return a > 0; // expected-warning {{ordered comparison between pointer and zero ('int *' and 'int') is an extension}}
+ return a > 42; // expected-warning {{ordered comparison between pointer and integer ('int *' and 'int')}}
+ return a > (void *)0; // expected-warning {{comparison of distinct pointer types}}
+}
+
+int function_pointers(int (*a)(int), int (*b)(int), void (*c)(int)) {
+ return a > b; // expected-warning {{ordered comparison of function pointers}}
+ return function_pointers > function_pointers; // expected-warning {{self-comparison always evaluates to false}} expected-warning{{ordered comparison of function pointers}}
+ return a > c; // expected-warning {{comparison of distinct pointer types}}
+ return a == (void *) 0;
+ return a == (void *) 1; // expected-warning {{equality comparison between function pointer and void pointer}}
+}
+
+int void_pointers(void* foo) {
+ return foo == (void*) 0;
+ return foo == (void*) 1;
+}
+
+
+int test1(int i) {
+ enum en { zero };
+ return i > zero;
+}
+
+// PR5937
+int test2(int i32) {
+ struct foo {
+ unsigned int u8 : 8;
+ unsigned long long u31 : 31;
+ unsigned long long u32 : 32;
+ unsigned long long u63 : 63;
+ unsigned long long u64 : 64;
+ } *x;
+
+ if (x->u8 == i32) { // comparison in int32, exact
+ return 0;
+ } else if (x->u31 == i32) { // comparison in int32, exact
+ return 1;
+ } else if (x->u32 == i32) { // expected-warning {{comparison of integers of different signs}}
+ return 2;
+ } else if (x->u63 == i32) { // comparison in uint64, exact because ==
+ return 3;
+ } else if (x->u64 == i32) { // expected-warning {{comparison of integers of different signs}}
+ return 4;
+ } else {
+ return 5;
+ }
+}
+
+// PR5887
+void test3() {
+ unsigned short x, y;
+ unsigned int z;
+ if ((x > y ? x : y) > z)
+ (void) 0;
+}
+
+// PR5961
+extern char *ptr4;
+void test4() {
+ long value;
+ if (value < (unsigned long) &ptr4) // expected-warning {{comparison of integers of different signs}}
+ return;
+}
+
+// PR4807
+int test5(unsigned int x) {
+ return (x < 0) // expected-warning {{comparison of unsigned expression < 0 is always false}}
+ && (0 > x) // expected-warning {{comparison of 0 > unsigned expression is always false}}
+ && (x >= 0) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
+ && (0 <= x); // expected-warning {{comparison of 0 <= unsigned expression is always true}}
+}
+
+int test6(unsigned i, unsigned power) {
+ unsigned x = (i < (1 << power) ? i : 0);
+ return x != 3 ? 1 << power : i;
+}
+
+// <rdar://problem/8414119> enum >= (enum)0 comparison should not generate any warnings
+enum rdar8414119_Vals { X, Y, Z };
+#define ZERO 0
+#define CHECK(x) (x >= X)
+void rdar8414119_foo(enum rdar8414119_Vals v) {
+ if (CHECK(v)) // no-warning
+ return;
+ if (v >= X) // no-warning
+ return;
+}
+int rdar8414119_bar(unsigned x) {
+ return x >= ZERO; // no-warning
+}
+#undef ZERO
+#undef CHECK
+
+int rdar8511238() {
+ enum A { A_foo, A_bar };
+ enum A a;
+
+ if (a == 0)
+ return 0;
+ if (a != 0)
+ return 0;
+ if (a < 0) // expected-warning {{comparison of unsigned enum expression < 0 is always false}}
+ return 0;
+ if (a <= 0)
+ return 0;
+ if (a > 0)
+ return 0;
+ if (a >= 0) // expected-warning {{comparison of unsigned enum expression >= 0 is always true}}
+ return 0;
+
+ if (0 == a)
+ return 0;
+ if (0 != a)
+ return 0;
+ if (0 < a)
+ return 0;
+ if (0 <= a) // expected-warning {{comparison of 0 <= unsigned enum expression is always true}}
+ return 0;
+ if (0 > a) // expected-warning {{comparison of 0 > unsigned enum expression is always false}}
+ return 0;
+ if (0 >= a)
+ return 0;
+
+ if (a == 0U)
+ return 0;
+ if (a != 0U)
+ return 0;
+ if (a < 0U) // expected-warning {{comparison of unsigned enum expression < 0 is always false}}
+ return 0;
+ if (a <= 0U)
+ return 0;
+ if (a > 0U)
+ return 0;
+ if (a >= 0U) // expected-warning {{comparison of unsigned enum expression >= 0 is always true}}
+ return 0;
+
+ if (0U == a)
+ return 0;
+ if (0U != a)
+ return 0;
+ if (0U < a)
+ return 0;
+ if (0U <= a) // expected-warning {{comparison of 0 <= unsigned enum expression is always true}}
+ return 0;
+ if (0U > a) // expected-warning {{comparison of 0 > unsigned enum expression is always false}}
+ return 0;
+ if (0U >= a)
+ return 0;
+
+ return 20;
+}
+
+// PR10336
+int test9(int sv, unsigned uv, long slv) {
+ return sv == (uv ^= slv); // expected-warning {{comparison of integers of different signs: 'int' and 'unsigned int'}}
+}
+
+void test10(void) {
+ int si;
+ unsigned int ui;
+ long sl;
+
+ _Bool b;
+ b = (si == (ui = sl)); // expected-warning {{comparison of integers of different signs: 'int' and 'unsigned int'}}
+ b = (si == (ui = sl&15));
+}
+
+// PR11572
+struct test11S { unsigned x : 30; };
+int test11(unsigned y, struct test11S *p) {
+ return y > (p->x >> 24); // no-warning
+}
+
+typedef char one_char[1];
+typedef char two_chars[2];
+
+void test12(unsigned a) {
+ if (0 && -1 > a) { }
+}
+
+// PR36008
+
+enum PR36008EnumTest {
+ kPR36008Value = 0,
+};
+
+void pr36008(enum PR36008EnumTest lhs) {
+ __typeof__(lhs) x = lhs;
+ __typeof__(kPR36008Value) y = (kPR36008Value);
+ if (x == y) x = y; // no warning
+ if (y == x) y = x; // no warning
+}
