1 ; 2 ; Test: ExternalConstant 3 ; 4 ; Description: 5 ; This regression test helps check whether the instruction combining 6 ; optimization pass correctly handles global variables which are marked 7 ; as external and constant. 8 ; 9 ; If a problem occurs, we should die on an assert(). Otherwise, we 10 ; should pass through the optimizer without failure. 11 ; 12 ; Extra code: 13 ; RUN: opt < %s -instcombine 14 ; END. 15 16 target datalayout = "e-p:32:32" 17 @silly = external constant i32 ; <i32*> [#uses=1] 18 19 declare void @bzero(i8*, i32) 20 21 declare void @bcopy(i8*, i8*, i32) 22 23 declare i32 @bcmp(i8*, i8*, i32) 24 25 declare i32 @fputs(i8*, i8*) 26 27 declare i32 @fputs_unlocked(i8*, i8*) 28 29 define i32 @function(i32 %a.1) { 30 entry: 31 %a.0 = alloca i32 ; <i32*> [#uses=2] 32 %result = alloca i32 ; <i32*> [#uses=2] 33 store i32 %a.1, i32* %a.0 34 %tmp.0 = load i32* %a.0 ; <i32> [#uses=1] 35 %tmp.1 = load i32* @silly ; <i32> [#uses=1] 36 %tmp.2 = add i32 %tmp.0, %tmp.1 ; <i32> [#uses=1] 37 store i32 %tmp.2, i32* %result 38 br label %return 39 40 return: ; preds = %entry 41 %tmp.3 = load i32* %result ; <i32> [#uses=1] 42 ret i32 %tmp.3 43 } 44 45
