http://llvm.org/bugs/show_bug.cgi?id=20100
Bug ID: 20100
Summary: Emitting remark when failing to unroll a loop with the
unroll pragma specified
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 12693
--> http://llvm.org/bugs/attachment.cgi?id=12693&action=edit
example where LLVM fails to unroll a loop with the unroll pragma
If the compiler fails to unroll a loop with the unroll pragma, the compiler can
emit remark instead of silently missing the unrolling.
In the attached example, the programmer specifies the unroll pragma and expects
the loop to be unrolled because it has a constant bound. But for some reason,
LoopUnrollPass fails to unroll it.
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