[LLVMbugs] [Bug 19069] New: t9 not always used as jalr argument for PIC calls

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19069

            Bug ID: 19069
           Summary: t9 not always used as jalr argument for PIC calls
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: Backend: MIPS
          Assignee: unassignedbugs at nondot.org
          Reporter: csdavec at swan.ac.uk
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Since the introduction of the PIC-call optimiser, the MIPS back end no longer
enforces the requirement that the jalr instruction should use t9 as the
argument.  This breaks pretty much all code compiled at -O0, as the PIC-call
optimiser (which now does the jalr fixup) is not run.

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