2 ; Test: ExternalConstant
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.
9 ; If a problem occurs, we should die on an assert(). Otherwise, we
10 ; should pass through the optimizer without failure.
13 ; RUN: opt < %s -instcombine
16 target datalayout = "e-p:32:32"
17 @silly = external constant i32 ; <i32*> [#uses=1]
19 declare void @bzero(i8*, i32)
21 declare void @bcopy(i8*, i8*, i32)
23 declare i32 @bcmp(i8*, i8*, i32)
25 declare i32 @fputs(i8*, i8*)
27 declare i32 @fputs_unlocked(i8*, i8*)
29 define i32 @function(i32 %a.1) {
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
40 return: ; preds = %entry
41 %tmp.3 = load i32* %result ; <i32> [#uses=1]