4 ;; From: test/Programs/External/SPEC/CINT2000/254.gap.llvm.bc
5 ;; Function: int %OpenOutput(sbyte* %filename.1)
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.
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!
19 %FileType = type { i32, [256 x i8], i32, i32, i32, i32 }
20 @OutputFiles = external global [16 x %FileType] ; <ptr> [#uses=1]
21 @Output = internal global ptr null ; <ptr> [#uses=1]
23 define internal i32 @OpenOutput(ptr %filename.1) {
25 %tmp.0 = load ptr, ptr @Output ; <ptr> [#uses=1]
26 %tmp.4 = getelementptr %FileType, ptr %tmp.0, i64 1 ; <ptr> [#uses=1]
27 %addrOfGlobal = getelementptr [16 x %FileType], ptr @OutputFiles, i64 0 ; <ptr> [#uses=1]
28 %constantGEP = getelementptr [16 x %FileType], ptr %addrOfGlobal, i64 1 ; <ptr> [#uses=1]
29 %constantGEP.upgrd.1 = getelementptr [16 x %FileType], ptr %constantGEP, i64 0, i64 0 ; <ptr> [#uses=1]
30 %tmp.10 = icmp eq ptr %tmp.4, %constantGEP.upgrd.1 ; <i1> [#uses=1]
31 br i1 %tmp.10, label %return, label %endif.0
33 endif.0: ; preds = %entry
36 return: ; preds = %entry