https://bugs.llvm.org/show_bug.cgi?id=50482
Bug ID: 50482
Summary: optimizer malloc
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
#include <stdlib.h>
int is_any_memory_available(int n){
char *x = malloc(n);
int y = (x != NULL);
free(x);
return y;
}
Works with -O0
With -O3 is optmized to
is_any_memory_available: # @is_any_memory_available
mov eax, 1
ret
https://godbolt.org/z/4fr7Wz7n7
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