| ; RUN: opt < %s -indvars -S | FileCheck %s |
| |
| ; Indvars should be able to compute the exit value of this loop |
| ; without any additional arithmetic. The only add needed should |
| ; be the canonical IV increment. |
| |
| 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" |
| |
| define void @foo(double* %p, i32 %n) nounwind { |
| ; CHECK-LABEL: @foo( |
| ; CHECK: add |
| ; CHECK-NOT: add |
| |
| entry: |
| %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] |
| br i1 %0, label %bb.nph, label %return |
| |
| bb.nph: ; preds = %entry |
| br label %bb2 |
| |
| bb2: ; preds = %bb3, %bb.nph |
| %i.01 = phi i32 [ %7, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=3] |
| %1 = sext i32 %i.01 to i64 ; <i64> [#uses=1] |
| %2 = getelementptr double, double* %p, i64 %1 ; <double*> [#uses=1] |
| %3 = load double, double* %2, align 8 ; <double> [#uses=1] |
| %4 = fmul double %3, 1.100000e+00 ; <double> [#uses=1] |
| %5 = sext i32 %i.01 to i64 ; <i64> [#uses=1] |
| %6 = getelementptr double, double* %p, i64 %5 ; <double*> [#uses=1] |
| store double %4, double* %6, align 8 |
| %7 = add i32 %i.01, 1 ; <i32> [#uses=2] |
| br label %bb3 |
| |
| bb3: ; preds = %bb2 |
| %8 = icmp slt i32 %7, %n ; <i1> [#uses=1] |
| br i1 %8, label %bb2, label %bb3.return_crit_edge |
| |
| bb3.return_crit_edge: ; preds = %bb3 |
| br label %return |
| |
| return: ; preds = %bb3.return_crit_edge, %entry |
| ret void |
| } |
