http://bugzilla.gdcproject.org/show_bug.cgi?id=141
Bug ID: 141
Summary: Signed integer overflow handled incorrectly
Product: GDC
Version: 4.9.x
Hardware: All
OS: All
Status: NEW
Severity: critical
Priority: Normal
Component: gdc
Assignee: [email protected]
Reporter: [email protected]
This
---
bool foo(int a) {
return a > (a + 1);
}
---
produces
---
_D4test3fooFiZb:
xorl %eax, %eax
ret
---
using the GDC 4.9.0 from the Arch Linux repositories.
However, the spec (http://dlang.org/expression.html) says: "If both operands
are of integral types and an overflow or underflow occurs in the computation,
wrapping will happen." There is no mention that this does not apply to signed
integral types as well.
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