Hey, I'm working on an optimization pass that merges the comparisons in
defaulted struct equality operators, the spaceship-* testcases all pass, except
for spaceship-eq12.C:
FAIL: g++.dg/cpp2a/spaceship-eq12.C -std=gnu++20 (test for excess errors)
FAIL: g++.dg/cpp2a/spaceship-eq12.C -std=gnu++26 (test for excess errors)
FAIL: g++.dg/cpp2a/spaceship-eq12.C -std=gnu++23 (test for excess errors)
=== g++ Summary ===
# of expected passes 209
# of unexpected failures 3
/home/tdebock/gcc-vectorize/gcc/objdir/gcc/xg++ version 16.0.0 20250704
(experimental) (GCC)
This confuses me, since when compiling the testcase with, and without the
optimization enabled and running them, they both return the same value.
This is not surprising since they are the exact same binaries:
> sha1sum test_optimization_off
c45352213dd39a6a3b32d3549b40aeb9a17db464 test_optimization_off
> sha1sum test_optimization_on
c45352213dd39a6a3b32d3549b40aeb9a17db464 test_optimization_on
The only thing the optimization does on this testcase is, during the SSA pass,
switch the != operators on component refs out for ==, switching the basic
blocks' edges as well.
Does DejaGnu test some attributes about the intermediate languages as well,
what is going on here?
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