1 ; RUN: llc < %s 2 3 ;; Date: May 28, 2003. 4 ;; From: test/Programs/External/SPEC/CINT2000/254.gap.llvm.bc 5 ;; Function: int %OpenOutput(sbyte* %filename.1) 6 ;; 7 ;; Error: A sequence of GEPs is folded incorrectly by llc during selection 8 ;; causing an assertion about a dynamic casting error. 9 ;; This code sequence was produced (correctly) by preselection 10 ;; from a nested pair of ConstantExpr getelementptrs. 11 ;; The code below is the output of preselection. 12 ;; The original ConstantExprs are included in a comment. 13 ;; 14 ;; Cause: FoldGetElemChain() was inserting an extra leading 0 even though 15 ;; the first instruction in the sequence contributes no indices. 16 ;; The next instruction contributes a leading non-zero so another 17 ;; zero should not be added before it! 18 ;; 19 %FileType = type { i32, [256 x i8], i32, i32, i32, i32 } 20 @OutputFiles = external global [16 x %FileType] ; <[16 x %FileType]*> [#uses=1] 21 @Output = internal global %FileType* null ; <%FileType**> [#uses=1] 22 23 define internal i32 @OpenOutput(i8* %filename.1) { 24 entry: 25 %tmp.0 = load %FileType** @Output ; <%FileType*> [#uses=1] 26 %tmp.4 = getelementptr %FileType* %tmp.0, i64 1 ; <%FileType*> [#uses=1] 27 %addrOfGlobal = getelementptr [16 x %FileType]* @OutputFiles, i64 0 ; <[16 x %FileType]*> [#uses=1] 28 %constantGEP = getelementptr [16 x %FileType]* %addrOfGlobal, i64 1 ; <[16 x %FileType]*> [#uses=1] 29 %constantGEP.upgrd.1 = getelementptr [16 x %FileType]* %constantGEP, i64 0, i64 0 ; <%FileType*> [#uses=1] 30 %tmp.10 = icmp eq %FileType* %tmp.4, %constantGEP.upgrd.1 ; <i1> [#uses=1] 31 br i1 %tmp.10, label %return, label %endif.0 32 33 endif.0: ; preds = %entry 34 ret i32 0 35 36 return: ; preds = %entry 37 ret i32 1 38 } 39 40
