1 ; RUN: opt < %s -indvars -S > %t
2 ; RUN: grep sext %t | count 1
3 ; RUN: grep phi %t | count 1
4 ; RUN: grep {phi i64} %t
6 ; Indvars should insert a 64-bit induction variable to eliminate the
7 ; sext for the addressing, however it shouldn't eliminate the sext
8 ; on the other phi, since that value undergoes signed wrapping.
10 define void @foo(i32* nocapture %d, i32 %n) nounwind {
12 %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
13 br i1 %0, label %bb.nph, label %return
15 bb.nph: ; preds = %entry
18 bb: ; preds = %bb1, %bb.nph
19 %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2]
20 %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2]
21 %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1]
22 %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1]
23 %3 = getelementptr i32* %d, i64 %2 ; <i32*> [#uses=1]
24 store i32 %1, i32* %3, align 4
25 %4 = add i8 %p.01, 1 ; <i8> [#uses=1]
26 %5 = add i32 %i.02, 1 ; <i32> [#uses=2]
30 %6 = icmp slt i32 %5, %n ; <i1> [#uses=1]
31 br i1 %6, label %bb, label %bb1.return_crit_edge
33 bb1.return_crit_edge: ; preds = %bb1
36 return: ; preds = %bb1.return_crit_edge, %entry