[LLVMbugs] [Bug 13947] New: [ppc64] Single-precision floating-point parameter passing does not match PPC64 ELF ABI

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13947

             Bug #: 13947
           Summary: [ppc64] Single-precision floating-point parameter
                    passing does not match PPC64 ELF ABI
           Product: libraries
           Version: trunk
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: PowerPC
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: wschmidt at linux.vnet.ibm.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


For the 64-bit PowerPC SVR4 subtarget, single-precision floating-point
parameters are erroneously mapped to the first word of the corresponding slot
in the parameter save area, rather than the second word.

An example of a failing test from the GCC ABI compatibility test suite:

FAIL: gcc.dg/compat/scalar-by-value-2 c_compat_x_tst.o-c_compat_y_alt.o execute

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