https://bugs.llvm.org/show_bug.cgi?id=36050
Bug ID: 36050
Summary: Suspected bug on nested union type-punning
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: chen.pang...@jdh8.org
CC: llvm-bugs@lists.llvm.org
#define reinterpret(T, x) ((union { __typeof__(x) from; T to; }){ x }.to)
float fail(float x)
{
// error: initializer element is not a compile-time constant
return reinterpret(float, reinterpret(int, x) | 0x7FC00000);
}
float pass(float x)
{
unsigned i = reinterpret(int, x);
return reinterpret(int, i | 0x7FC00000);
}
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