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[Bug middle-end/88301] Optimization regression with undefined unsigned overflow
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 01 Dec 2018 20:11:17 +0000
- Subject: [Bug middle-end/88301] Optimization regression with undefined unsigned overflow
- Auto-submitted: auto-generated
- References: <bug-88301-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88301
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
In the EVRP dump, I see:
_2: unsigned int [0, 1]
_3: _Bool [0, 1]
[...]
_1 = REALPART_EXPR <_6>;
# RANGE [0, 1] NONZERO 1
_2 = IMAGPART_EXPR <_6>;
# RANGE [0, 0] NONZERO 0
_3 = (_BoolD.1896) _2;
Not sure where this [0, 0] range is coming from...