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; RUN: opt < %s -indvars -S > %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
}
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