| Serguei Katkov | 38414b5 | 2017-06-09 06:11:59 +0000 | [diff] [blame] | 1 | ; LFTR should not eliminate the need for the computation of i*i completely |
| 2 | ; due to LFTR is disabled. |
| 3 | ; RUN: opt < %s -indvars -dce -disable-lftr -S | FileCheck %s |
| 4 | |
| 5 | ; Provide legal integer types. |
| 6 | target datalayout = "n8:16:32:64" |
| 7 | |
| 8 | |
| 9 | @A = external global i32 ; <i32*> [#uses=1] |
| 10 | |
| 11 | define i32 @quadratic_setlt() { |
| 12 | ; CHECK-LABEL: @quadratic_setlt( |
| 13 | ; CHECK: mul |
| 14 | entry: |
| 15 | br label %loop |
| 16 | |
| 17 | loop: ; preds = %loop, %entry |
| 18 | %i = phi i32 [ 7, %entry ], [ %i.next, %loop ] ; <i32> [#uses=5] |
| 19 | %i.next = add i32 %i, 1 ; <i32> [#uses=1] |
| 20 | store i32 %i, i32* @A |
| 21 | %i2 = mul i32 %i, %i ; <i32> [#uses=1] |
| 22 | %c = icmp slt i32 %i2, 1000 ; <i1> [#uses=1] |
| 23 | br i1 %c, label %loop, label %loopexit |
| 24 | |
| 25 | loopexit: ; preds = %loop |
| 26 | ret i32 %i |
| 27 | } |
| 28 | |