| Sanjoy Das | e178f46 | 2015-04-14 03:20:38 +0000 | [diff] [blame^] | 1 | ; RUN: opt -S -unroll-runtime -loop-unroll < %s | FileCheck %s |
| 2 | |
| 3 | 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-n8:16:32:64-S128" |
| 4 | |
| 5 | ;; Check that we don't emit expensive instructions to compute trip |
| 6 | ;; counts when unrolling loops. |
| 7 | |
| 8 | define i32 @test(i64 %v12, i8* %array, i64* %loc) { |
| 9 | ; CHECK-LABEL: @test( |
| 10 | ; CHECK-NOT: udiv |
| 11 | entry: |
| 12 | %step = load i64, i64* %loc, !range !0 |
| 13 | br label %loop |
| 14 | |
| 15 | loop: ; preds = %entry, %loop |
| 16 | %k.015 = phi i64 [ %v15, %loop ], [ %v12, %entry ] |
| 17 | %v14 = getelementptr inbounds i8, i8* %array, i64 %k.015 |
| 18 | store i8 0, i8* %v14 |
| 19 | %v15 = add nuw nsw i64 %k.015, %step |
| 20 | %v16 = icmp slt i64 %v15, 8193 |
| 21 | br i1 %v16, label %loop, label %loopexit |
| 22 | |
| 23 | loopexit: ; preds = %loop |
| 24 | ret i32 0 |
| 25 | } |
| 26 | |
| 27 | !0 = !{i64 1, i64 100} |