;; Date: May 28, 2003. ;; From: test/Programs/External/SPEC/CINT2000/254.gap.llvm.bc ;; Function: int %OpenOutput(sbyte* %filename.1) ;; ;; Error: A sequence of GEPs is folded incorrectly by llc during selection ;; causing an assertion about a dynamic casting error. ;; This code sequence was produced (correctly) by preselection ;; from a nested pair of ConstantExpr getelementptrs. ;; The code below is the output of preselection. ;; The original ConstantExprs are included in a comment. ;; ;; Cause: FoldGetElemChain() was inserting an extra leading 0 even though ;; the first instruction in the sequence contributes no indices. ;; The next instruction contributes a leading non-zero so another ;; zero should not be added before it! ;; %FileType = type { int, [256 x sbyte], int, int, int, int } %OutputFiles = uninitialized global [16 x %FileType] %Output = internal global %FileType* null implementation; Functions: internal int %OpenOutput(sbyte* %filename.1) { entry: %tmp.0 = load %FileType** %Output %tmp.4 = getelementptr %FileType* %tmp.0, long 1 ;;------ Original instruction in 254.gap.llvm.bc: ;; %tmp.10 = seteq { int, [256 x sbyte], int, int, int, int }* %tmp.4, getelementptr ([16 x { int, [256 x sbyte], int, int, int, int }]* getelementptr ([16 x { int, [256 x sbyte], int, int, int, int }]* %OutputFiles, long 1), long 0, long 0) ;;------ Code sequence produced by preselection phase for above instr: ;; This code sequence is folded incorrectly by llc during selection ;; causing an assertion about a dynamic casting error. %addrOfGlobal = getelementptr [16 x %FileType]* %OutputFiles, long 0 %constantGEP = getelementptr [16 x %FileType]* %addrOfGlobal, long 1 %constantGEP = getelementptr [16 x %FileType]* %constantGEP, long 0, long 0 %tmp.10 = seteq %FileType* %tmp.4, %constantGEP br bool %tmp.10, label %return, label %endif.0 endif.0: ret int 0 return: ret int 1 }