https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93269
Bug ID: 93269
Summary: 32bit-pointer to uint64_t cast sign-extends
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jan.kratochvil at redhat dot com
Target Milestone: ---
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
int main() {
void *p=(void *)0x80000000;
printf( "%p" "\n", p );// 0x80000000
printf("0x%" PRIxPTR "\n", (uintptr_t)p );// 0x80000000
printf("0x%" PRIx64 "\n",reinterpret_cast<uint64_t>(p));// 0xffffffff80000000
printf("0x%" PRIx64 "\n", (uint64_t) p );// 0xffffffff80000000
printf("0x%" PRIx64 "\n", (uint64_t)(uintptr_t)p );// 0x80000000
}
gcc-9.2.1-1.fc30.x86_64
g++ -o addr_t2 addr_t2.cpp -Wall -g -m32
0x80000000
0x80000000
0xffffffff80000000
0xffffffff80000000
0x80000000
clang-8.0.0-3.fc30.x86_64
clang++ -o addr_t2 addr_t2.cpp -Wall -g -m32 ;./addr_t2
0x80000000
0x80000000
0x80000000
0x80000000
0x80000000
It may be in some standard but it looks suspicious to me.
