| ; RUN: llvm-as < %s | opt -indvars | llvm-dis > %t |
| ; RUN: grep {%exitcond = icmp eq i64 %indvar.next, %n} %t |
| ; RUN: grep {getelementptr i8\\* %A, i64 %indvar} %t |
| ; RUN: grep getelementptr %t | count 1 |
| ; RUN: grep add %t | count 1 |
| ; RUN: not grep scevgep %t |
| ; RUN: not grep ptrtoint %t |
| |
| ; Indvars should be able to expand the pointer-arithmetic |
| ; IV into an integer IV indexing into a simple getelementptr. |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64" |
| |
| define void @foo(i8* %A, i64 %n) nounwind { |
| entry: |
| %0 = icmp eq i64 %n, 0 ; <i1> [#uses=1] |
| br i1 %0, label %return, label %bb.nph |
| |
| bb.nph: ; preds = %entry |
| %1 = getelementptr i8* %A, i64 %n ; <i8*> [#uses=1] |
| br label %bb |
| |
| bb: ; preds = %bb1, %bb.nph |
| %q.01 = phi i8* [ %2, %bb1 ], [ %A, %bb.nph ] ; <i8*> [#uses=2] |
| store i8 0, i8* %q.01, align 1 |
| %2 = getelementptr i8* %q.01, i64 1 ; <i8*> [#uses=2] |
| br label %bb1 |
| |
| bb1: ; preds = %bb |
| %3 = icmp eq i8* %1, %2 ; <i1> [#uses=1] |
| br i1 %3, label %bb1.return_crit_edge, label %bb |
| |
| bb1.return_crit_edge: ; preds = %bb1 |
| br label %return |
| |
| return: ; preds = %bb1.return_crit_edge, %entry |
| ret void |
| } |
