[LLVMbugs] [Bug 2977] New: new type legalizer fails to codegen some va_args

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Oct 29 05:18:13 PDT 2008


           Summary: new type legalizer fails to codegen some va_args
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nunoplopes at sapo.pt
                CC: llvmbugs at cs.uiuc.edu

The following code crashes llc:

define i8* @ap_php_conv_p2(){
        %ap.addr = alloca i8*           ; <i8**> [#uses=36]
        br label %sw.bb301
        %0 = va_arg i8** %ap.addr, i64          ; <i64> [#uses=1]
        br label %sw.bb301

with the error:

ExpandIntegerResult #0: 0x906fc34: i64,ch = vaarg 0x906fa08, 0x906fbac,
llc: LegalizeIntegerTypes.cpp:951: void
llvm::DAGTypeLegalizer::ExpandIntegerResult(llvm::SDNode*, unsigned int):
Assertion `0 && "Do not know how to expand the result of this operator!"'

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