1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 3 ; Indvars should be able to compute the exit value of this loop 4 ; without any additional arithmetic. The only add needed should 5 ; be the canonical IV increment. 6 7 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" 8 9 define void @foo(double* %p, i32 %n) nounwind { 10 ; CHECK-LABEL: @foo( 11 ; CHECK: add 12 ; CHECK-NOT: add 13 14 entry: 15 %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] 16 br i1 %0, label %bb.nph, label %return 17 18 bb.nph: ; preds = %entry 19 br label %bb2 20 21 bb2: ; preds = %bb3, %bb.nph 22 %i.01 = phi i32 [ %7, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=3] 23 %1 = sext i32 %i.01 to i64 ; <i64> [#uses=1] 24 %2 = getelementptr double, double* %p, i64 %1 ; <double*> [#uses=1] 25 %3 = load double, double* %2, align 8 ; <double> [#uses=1] 26 %4 = fmul double %3, 1.100000e+00 ; <double> [#uses=1] 27 %5 = sext i32 %i.01 to i64 ; <i64> [#uses=1] 28 %6 = getelementptr double, double* %p, i64 %5 ; <double*> [#uses=1] 29 store double %4, double* %6, align 8 30 %7 = add i32 %i.01, 1 ; <i32> [#uses=2] 31 br label %bb3 32 33 bb3: ; preds = %bb2 34 %8 = icmp slt i32 %7, %n ; <i1> [#uses=1] 35 br i1 %8, label %bb2, label %bb3.return_crit_edge 36 37 bb3.return_crit_edge: ; preds = %bb3 38 br label %return 39 40 return: ; preds = %bb3.return_crit_edge, %entry 41 ret void 42 } 43
