diff options
Diffstat (limited to 'test/Transforms/LoopUnroll/unroll-pragmas-disabled.ll')
| -rw-r--r-- | test/Transforms/LoopUnroll/unroll-pragmas-disabled.ll | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnroll/unroll-pragmas-disabled.ll b/test/Transforms/LoopUnroll/unroll-pragmas-disabled.ll new file mode 100644 index 0000000..db18f25 --- /dev/null +++ b/test/Transforms/LoopUnroll/unroll-pragmas-disabled.ll @@ -0,0 +1,149 @@ +; RUN: opt < %s -loop-unroll -S | FileCheck %s +; +; Verify that the unrolling pass removes existing unroll count metadata +; and adds a disable unrolling node after unrolling is complete. + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +; #pragma clang loop vectorize(enable) unroll_count(4) vectorize_width(8) +; +; Unroll count metadata should be replaced with unroll(disable). Vectorize +; metadata should be untouched. +; +; CHECK-LABEL: @unroll_count_4( +; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]] +define void @unroll_count_4(i32* nocapture %a) { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv + %0 = load i32* %arrayidx, align 4 + %inc = add nsw i32 %0, 1 + store i32 %inc, i32* %arrayidx, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv.next, 64 + br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !1 + +for.end: ; preds = %for.body + ret void +} +!1 = metadata !{metadata !1, metadata !2, metadata !3, metadata !4} +!2 = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true} +!3 = metadata !{metadata !"llvm.loop.unroll.count", i32 4} +!4 = metadata !{metadata !"llvm.loop.vectorize.width", i32 8} + +; #pragma clang loop unroll(full) +; +; An unroll disable metadata node is only added for the unroll count case. +; In this case, the loop has a full unroll metadata but can't be fully unrolled +; because the trip count is dynamic. The full unroll metadata should remain +; after unrolling. +; +; CHECK-LABEL: @unroll_full( +; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]] +define void @unroll_full(i32* nocapture %a, i32 %b) { +entry: + %cmp3 = icmp sgt i32 %b, 0 + br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !5 + +for.body: ; preds = %entry, %for.body + %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] + %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv + %0 = load i32* %arrayidx, align 4 + %inc = add nsw i32 %0, 1 + store i32 %inc, i32* %arrayidx, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, %b + br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !5 + +for.end: ; preds = %for.body, %entry + ret void +} +!5 = metadata !{metadata !5, metadata !6} +!6 = metadata !{metadata !"llvm.loop.unroll.full"} + +; #pragma clang loop unroll(disable) +; +; Unroll metadata should not change. +; +; CHECK-LABEL: @unroll_disable( +; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_3:.*]] +define void @unroll_disable(i32* nocapture %a) { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv + %0 = load i32* %arrayidx, align 4 + %inc = add nsw i32 %0, 1 + store i32 %inc, i32* %arrayidx, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv.next, 64 + br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !7 + +for.end: ; preds = %for.body + ret void +} +!7 = metadata !{metadata !7, metadata !8} +!8 = metadata !{metadata !"llvm.loop.unroll.disable"} + +; This function contains two loops which share the same llvm.loop metadata node +; with an llvm.loop.unroll.count 2 hint. Both loops should be unrolled. This +; verifies that adding disable metadata to a loop after unrolling doesn't affect +; other loops which previously shared the same llvm.loop metadata. +; +; CHECK-LABEL: @shared_metadata( +; CHECK: store i32 +; CHECK: store i32 +; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_4:.*]] +; CHECK: store i32 +; CHECK: store i32 +; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_5:.*]] +define void @shared_metadata(i32* nocapture %List) #0 { +entry: + br label %for.body3 + +for.body3: ; preds = %for.body3, %entry + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body3 ] + %arrayidx = getelementptr inbounds i32* %List, i64 %indvars.iv + %0 = load i32* %arrayidx, align 4 + %add4 = add nsw i32 %0, 10 + store i32 %add4, i32* %arrayidx, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv.next, 4 + br i1 %exitcond, label %for.body3.1.preheader, label %for.body3, !llvm.loop !9 + +for.body3.1.preheader: ; preds = %for.body3 + br label %for.body3.1 + +for.body3.1: ; preds = %for.body3.1.preheader, %for.body3.1 + %indvars.iv.1 = phi i64 [ %1, %for.body3.1 ], [ 0, %for.body3.1.preheader ] + %1 = add nsw i64 %indvars.iv.1, 1 + %arrayidx.1 = getelementptr inbounds i32* %List, i64 %1 + %2 = load i32* %arrayidx.1, align 4 + %add4.1 = add nsw i32 %2, 10 + store i32 %add4.1, i32* %arrayidx.1, align 4 + %exitcond.1 = icmp eq i64 %1, 4 + br i1 %exitcond.1, label %for.inc5.1, label %for.body3.1, !llvm.loop !9 + +for.inc5.1: ; preds = %for.body3.1 + ret void +} +!9 = metadata !{metadata !9, metadata !10} +!10 = metadata !{metadata !"llvm.loop.unroll.count", i32 2} + + +; CHECK: ![[LOOP_1]] = metadata !{metadata ![[LOOP_1]], metadata ![[VEC_ENABLE:.*]], metadata ![[WIDTH_8:.*]], metadata ![[UNROLL_DISABLE:.*]]} +; CHECK: ![[VEC_ENABLE]] = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true} +; CHECK: ![[WIDTH_8]] = metadata !{metadata !"llvm.loop.vectorize.width", i32 8} +; CHECK: ![[UNROLL_DISABLE]] = metadata !{metadata !"llvm.loop.unroll.disable"} +; CHECK: ![[LOOP_2]] = metadata !{metadata ![[LOOP_2]], metadata ![[UNROLL_FULL:.*]]} +; CHECK: ![[UNROLL_FULL]] = metadata !{metadata !"llvm.loop.unroll.full"} +; CHECK: ![[LOOP_3]] = metadata !{metadata ![[LOOP_3]], metadata ![[UNROLL_DISABLE:.*]]} +; CHECK: ![[LOOP_4]] = metadata !{metadata ![[LOOP_4]], metadata ![[UNROLL_DISABLE:.*]]} +; CHECK: ![[LOOP_5]] = metadata !{metadata ![[LOOP_5]], metadata ![[UNROLL_DISABLE:.*]]} |