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