| Mark Heffernan | 053a686 | 2014-07-18 21:04:33 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -loop-unroll -S | FileCheck %s |
| 2 | ; |
| 3 | ; Verify that the unrolling pass removes existing loop unrolling metadata |
| 4 | ; and adds a disable unrolling node after unrolling is complete. |
| 5 | |
| 6 | target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| 7 | target triple = "x86_64-unknown-linux-gnu" |
| 8 | |
| 9 | ; #pragma clang loop vectorize(enable) unroll(enable) unroll_count(4) vectorize_width(8) |
| 10 | ; |
| 11 | ; Unroll metadata should be replaces with unroll(disable). Vectorize |
| 12 | ; metadata should be untouched. |
| 13 | ; |
| 14 | ; CHECK-LABEL: @loop1( |
| 15 | ; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]] |
| 16 | define void @loop1(i32* nocapture %a) { |
| 17 | entry: |
| 18 | br label %for.body |
| 19 | |
| 20 | for.body: ; preds = %for.body, %entry |
| 21 | %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| 22 | %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv |
| 23 | %0 = load i32* %arrayidx, align 4 |
| 24 | %inc = add nsw i32 %0, 1 |
| 25 | store i32 %inc, i32* %arrayidx, align 4 |
| 26 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| 27 | %exitcond = icmp eq i64 %indvars.iv.next, 64 |
| 28 | br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !1 |
| 29 | |
| 30 | for.end: ; preds = %for.body |
| 31 | ret void |
| 32 | } |
| 33 | !1 = metadata !{metadata !1, metadata !2, metadata !3, metadata !4, metadata !5} |
| 34 | !2 = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true} |
| 35 | !3 = metadata !{metadata !"llvm.loop.unroll.enable", i1 true} |
| 36 | !4 = metadata !{metadata !"llvm.loop.unroll.count", i32 4} |
| 37 | !5 = metadata !{metadata !"llvm.loop.vectorize.width", i32 8} |
| 38 | |
| 39 | ; #pragma clang loop unroll(disable) |
| 40 | ; |
| 41 | ; Unroll metadata should not change. |
| 42 | ; |
| 43 | ; CHECK-LABEL: @loop2( |
| 44 | ; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]] |
| 45 | define void @loop2(i32* nocapture %a) { |
| 46 | entry: |
| 47 | br label %for.body |
| 48 | |
| 49 | for.body: ; preds = %for.body, %entry |
| 50 | %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| 51 | %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv |
| 52 | %0 = load i32* %arrayidx, align 4 |
| 53 | %inc = add nsw i32 %0, 1 |
| 54 | store i32 %inc, i32* %arrayidx, align 4 |
| 55 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| 56 | %exitcond = icmp eq i64 %indvars.iv.next, 64 |
| 57 | br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !6 |
| 58 | |
| 59 | for.end: ; preds = %for.body |
| 60 | ret void |
| 61 | } |
| 62 | !6 = metadata !{metadata !6, metadata !7} |
| 63 | !7 = metadata !{metadata !"llvm.loop.unroll.enable", i1 false} |
| 64 | |
| 65 | ; CHECK: ![[LOOP_1]] = metadata !{metadata ![[LOOP_1]], metadata ![[VEC_ENABLE:.*]], metadata ![[WIDTH_8:.*]], metadata ![[UNROLL_DISABLE:.*]]} |
| 66 | ; CHECK: ![[VEC_ENABLE]] = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true} |
| 67 | ; CHECK: ![[WIDTH_8]] = metadata !{metadata !"llvm.loop.vectorize.width", i32 8} |
| 68 | ; CHECK: ![[UNROLL_DISABLE]] = metadata !{metadata !"llvm.loop.unroll.enable", i1 false} |
| 69 | ; CHECK: ![[LOOP_2]] = metadata !{metadata ![[LOOP_2]], metadata ![[UNROLL_DISABLE:.*]]} |