[LLVMbugs] [Bug 3898] New: Incomplete breakdown of soft-float vectors

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=3898

           Summary: Incomplete breakdown of soft-float vectors
           Product: libraries
           Version: trunk
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: compile-fail
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: stoklund at 2pi.dk
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=2768)
 --> (http://llvm.org/bugs/attachment.cgi?id=2768)
Test case for XCore backend

On a target with soft-float and only i32 registers, a <2 x double> vector is
legalized as follows:

v2f64 -> 2 x i64 -> 4 x i32

TargetLowering::getVectorTypeBreakdown() misses the last step, and a
FORMAL_ARGUMENTS node with two illegal i64 parameters is created. This triggers
an assert in XCoreTargetLowering::LowerCCCArguments()

I believe this bug only affects the XCore backend, but it is not a bug /in/ the
XCore backend. I found it while writing a new Blackfin backend.


-- 
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.