http://llvm.org/bugs/show_bug.cgi?id=9285
Summary: The LLVM LangRef is unclear regarding shift where the
shift size is larger than the word size
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: MSP430
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Currently, in the x86 backend, scalar shift-left operations use the intel SHL
opcode which only looks at the LSB of the shift word. Starting LLVM 2.8, the
vector-SHL started using the PSLLD shift, which looks at the entire shift value
and zeros the result if the value is greater than the word size.
The LLVM LangRef does not address the behavior of shift operations where the
shift size is larger than the word size.
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