https://bugzilla.gdcproject.org/show_bug.cgi?id=285
Bug ID: 285
Summary: Backend optimizer assumes strings are null terminated.
Product: GDC
Version: development
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Normal
Component: gdc
Assignee: [email protected]
Reporter: [email protected]
>From phobos.
---
inout(char)[] fromStringz(inout(char)* cString) @nogc @system pure nothrow {
import core.stdc.string : strlen;
return cString ? cString[0 .. strlen(cString)] : null;
}
///
void main()
{
assert(fromStringz(null) == null);
assert(fromStringz("foo") == "foo");
}
---
Although gdc calls: build_string(3, "foo"), gcc itself still expects us to
factor in the null terminator into the length.
Because of this, when optimizing an inlined 'fromStringz', the result of
strlen("foo") is folded into the value '2', instead of the expected '3'.
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