http://llvm.org/bugs/show_bug.cgi?id=17662
Bug ID: 17662
Summary: LoopVectorizer: setAlreadyVectorized needs to set
width and unroll to one
Product: tools
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: opt
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
/// Mark the loop L as already vectorized by setting the width to 1.
void setAlreadyVectorized(Loop *L)
We should set width *and* unroll to one. Because this is how we use it:
LoopVectorizeHints Hints(L, DisableUnrolling);
if (Hints.Width == 1 && Hints.Unroll == 1) {
DEBUG(dbgs() << "LV: Not vectorizing.\n");
return false;
}
We need to make sure that we set both otherwise we analyze vectorized loops
again.
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