7068aa9841
Clang has traditionally allowed C programs to implicitly convert integers to pointers and pointers to integers, despite it not being valid to do so except under special circumstances (like converting the integer 0, which is the null pointer constant, to a pointer). In C89, this would result in undefined behavior per 3.3.4, and in C99 this rule was strengthened to be a constraint violation instead. Constraint violations are most often handled as an error. This patch changes the warning to default to an error in all C modes (it is already an error in C++). This gives us better security posture by calling out potential programmer mistakes in code but still allows users who need this behavior to use -Wno-error=int-conversion to retain the warning behavior, or -Wno-int-conversion to silence the diagnostic entirely. Differential Revision: https://reviews.llvm.org/D129881
38 lines
937 B
C
38 lines
937 B
C
// RUN: %clang_cc1 -no-opaque-pointers -Wno-int-conversion -triple armv7-apple-darwin -target-feature +neon %s -emit-llvm -o - | FileCheck %s
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typedef struct _zend_ini_entry zend_ini_entry;
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struct _zend_ini_entry {
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void *mh_arg1;
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};
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char a;
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const zend_ini_entry ini_entries[] = {
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{ ((char*)&((zend_ini_entry*)0)->mh_arg1 - (char*)(void*)0)},
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};
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// PR7564
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struct GLGENH {
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int : 27;
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int EMHJAA : 1;
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};
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struct GLGENH ABHFBF = {1};
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typedef __attribute__(( ext_vector_type(2) )) unsigned int uint2;
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typedef __attribute__(( __vector_size__(8) )) unsigned int __neon_uint32x2_t;
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// rdar://8183908
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typedef unsigned int uint32_t;
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typedef __attribute__((neon_vector_type(2))) uint32_t uint32x2_t;
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void foo(void) {
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const uint32x2_t signBit = { (uint2) 0x80000000 };
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}
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// CHECK: %struct.fp_struct_foo = type { void ([1 x i32])* }
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struct fp_struct_bar { int a; };
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struct fp_struct_foo {
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void (*FP)(struct fp_struct_bar);
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} G;
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