[Issue 5239] optimizer misreports an used before set error

[d-bugmail]

http://d.puremagic.com/issues/show_bug.cgi?id=5239



--- Comment #1 from Brad Roberts bra...@puremagic.com 2011-08-03 00:06:43 PDT 
---
Part of the test case for bug 6293 triggers this bug when built with -O.  See
runnable/xtet46.d, test6293().  The buggy part is hidden behind version(none).

class C6293 {
C6293 token;
}
void f6293(in C6293[] a) pure {
auto x0 = a[0].token;
assert(x0 is a[0].token.token.token);
assert(x0 is (x0).token);
version(none) {
auto p1 = x0 + 1;
assert(x0 is (p1 - 1).token);
}
int c = 0;
assert(x0 is a[c].token);
}
void test6293() {
auto x = new C6293;
x.token = x;
f6293([x]);
}

See also:
  https://github.com/D-Programming-Language/dmd/pull/243

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[Issue 5239] optimizer misreports an used before set error

[d-bugmail]

http://d.puremagic.com/issues/show_bug.cgi?id=5239


Walter Bright bugzi...@digitalmars.com changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 CC||bugzi...@digitalmars.com
 Resolution||FIXED


--- Comment #2 from Walter Bright bugzi...@digitalmars.com 2011-08-03 
17:13:21 PDT ---
https://github.com/D-Programming-Language/dmd/commit/847abf5348b39b6b483cd11280b04d8590f722e5

https://github.com/D-Programming-Language/dmd/commit/12a19326129398af62da52dff86b9cf9f381d7dd

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