https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99394
--- Comment #2 from Richard Biener ---
This is a loop-carried data dependence which we can't handle (we avoid creating
those from PRE but here it appears in the source itself). I wonder how
LLVM handles this (pre/post vectorization IL).
Specifi
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99394
--- Comment #1 from Jan Hubicka ---
Here we fail with:
tsvc.c:1526:27: note: vect_is_simple_use: operand x_30 = PHI <_2(8),
x_18(3)>, type of def: unknown
tsvc.c:1526:27: missed: Unsupported pattern.
tsvc.c:1527:26: missed: not vectorized:
