http://llvm.org/bugs/show_bug.cgi?id=4916
Summary: Optimize add and unsigned compare to add-with-overflow
Product: libraries
Version: trunk
Platform: PC
URL: http://codepad.org/BqJOSpv6
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Scalar Optimizations
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
This is a forwarded complaint by "bearophile" on LLVM IRC, who unfortunately
never files bugs.
The URL contains the original test case.
llvm-gcc: gcc version 4.2.1 (Based on Apple Inc. build 5636) (LLVM build)
The following should be optimized to an add-with-overflow:
%c = add iN %a, $b
%d = icmp ult iN %c, %a
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