1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 ; RUN: opt < %s -indvars -disable-iv-rewrite -S | FileCheck %s 3 4 ; Indvars should insert a 64-bit induction variable to eliminate the 5 ; sext for the addressing, however it shouldn't eliminate the sext 6 ; on the other phi, since that value undergoes signed wrapping. 7 8 define void @foo(i32* nocapture %d, i32 %n) nounwind { 9 entry: 10 %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] 11 br i1 %0, label %bb.nph, label %return 12 13 bb.nph: ; preds = %entry 14 br label %bb 15 16 ; CHECK: bb: 17 ; CHECK: phi i64 18 ; CHECK: sext i8 19 ; CHECK-NOT: sext 20 bb: ; preds = %bb1, %bb.nph 21 %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2] 22 %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2] 23 %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1] 24 %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1] 25 %3 = getelementptr i32* %d, i64 %2 ; <i32*> [#uses=1] 26 store i32 %1, i32* %3, align 4 27 %4 = add i8 %p.01, 1 ; <i8> [#uses=1] 28 %5 = add i32 %i.02, 1 ; <i32> [#uses=2] 29 br label %bb1 30 31 bb1: ; preds = %bb 32 %6 = icmp slt i32 %5, %n ; <i1> [#uses=1] 33 br i1 %6, label %bb, label %bb1.return_crit_edge 34 35 bb1.return_crit_edge: ; preds = %bb1 36 br label %return 37 38 return: ; preds = %bb1.return_crit_edge, %entry 39 ret void 40 } 41
