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In the testcase for PR94784, we have two vectors with the same ABI identity but with different TYPE_MODEs. It would be better to flip the assert around so that it checks that the two vectors have equal TYPE_VECTOR_SUBPARTS and that converting the corresponding element types is a useless_type_conversion_p. 2020-04-27 Felix Yang <felix.yang@huawei.com> gcc/ PR tree-optimization/94784 * tree-ssa-forwprop.c (simplify_vector_constructor): Flip the assert around so that it checks that the two vectors have equal TYPE_VECTOR_SUBPARTS and that converting the corresponding element types is a useless_type_conversion_p. gcc/testsuite/ PR tree-optimization/94784 * gcc.dg/pr94784.c: New test.
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