diff options
Diffstat (limited to 'llvm/test/Regression/CodeGen/Generic/2003-05-30-BadFoldGEP.ll')
| -rw-r--r-- | llvm/test/Regression/CodeGen/Generic/2003-05-30-BadFoldGEP.ll | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/llvm/test/Regression/CodeGen/Generic/2003-05-30-BadFoldGEP.ll b/llvm/test/Regression/CodeGen/Generic/2003-05-30-BadFoldGEP.ll new file mode 100644 index 00000000000..5b372c51df5 --- /dev/null +++ b/llvm/test/Regression/CodeGen/Generic/2003-05-30-BadFoldGEP.ll @@ -0,0 +1,50 @@ +; RUN: llvm-as -f %s -o - | llc + +;; 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 +} |
