; RUN: opt < %s -loop-unroll -S | FileCheck %s
;
-; Verify that the unrolling pass removes existing loop unrolling metadata
+; 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(full) unroll_count(4) vectorize_width(8)
+; #pragma clang loop vectorize(enable) unroll_count(4) vectorize_width(8)
;
-; Unroll metadata should be replaced with unroll(disable). Vectorize
+; Unroll count metadata should be replaced with unroll(disable). Vectorize
; metadata should be untouched.
;
-; CHECK-LABEL: @loop1(
+; CHECK-LABEL: @unroll_count_4(
; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
-define void @loop1(i32* nocapture %a) {
+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
+ %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
+ %0 = load i32, 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
for.end: ; preds = %for.body
ret void
}
-!1 = metadata !{metadata !1, metadata !2, metadata !3, metadata !4, metadata !5}
-!2 = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true}
-!3 = metadata !{metadata !"llvm.loop.unroll.full"}
-!4 = metadata !{metadata !"llvm.loop.unroll.count", i32 4}
-!5 = metadata !{metadata !"llvm.loop.vectorize.width", i32 8}
+!1 = !{!1, !2, !3, !4}
+!2 = !{!"llvm.loop.vectorize.enable", i1 true}
+!3 = !{!"llvm.loop.unroll.count", i32 4}
+!4 = !{!"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, i32* %a, i64 %indvars.iv
+ %0 = load i32, 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 = !{!5, !6}
+!6 = !{!"llvm.loop.unroll.full"}
; #pragma clang loop unroll(disable)
;
; Unroll metadata should not change.
;
-; CHECK-LABEL: @loop2(
-; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
-define void @loop2(i32* nocapture %a) {
+; 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
+ %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
+ %0 = load i32, 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 !6
+ br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !7
for.end: ; preds = %for.body
ret void
}
-!6 = metadata !{metadata !6, metadata !7}
-!7 = metadata !{metadata !"llvm.loop.unroll.disable"}
-
-; 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_DISABLE:.*]]}
+!7 = !{!7, !8}
+!8 = !{!"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, i32* %List, i64 %indvars.iv
+ %0 = load i32, 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, i32* %List, i64 %1
+ %2 = load i32, 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 = !{!9, !10}
+!10 = !{!"llvm.loop.unroll.count", i32 2}
+
+
+; CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], ![[VEC_ENABLE:.*]], ![[WIDTH_8:.*]], ![[UNROLL_DISABLE:.*]]}
+; CHECK: ![[VEC_ENABLE]] = !{!"llvm.loop.vectorize.enable", i1 true}
+; CHECK: ![[WIDTH_8]] = !{!"llvm.loop.vectorize.width", i32 8}
+; CHECK: ![[UNROLL_DISABLE]] = !{!"llvm.loop.unroll.disable"}
+; CHECK: ![[LOOP_2]] = distinct !{![[LOOP_2]], ![[UNROLL_FULL:.*]]}
+; CHECK: ![[UNROLL_FULL]] = !{!"llvm.loop.unroll.full"}
+; CHECK: ![[LOOP_3]] = distinct !{![[LOOP_3]], ![[UNROLL_DISABLE:.*]]}
+; CHECK: ![[LOOP_4]] = distinct !{![[LOOP_4]], ![[UNROLL_DISABLE:.*]]}
+; CHECK: ![[LOOP_5]] = distinct !{![[LOOP_5]], ![[UNROLL_DISABLE:.*]]}
projects / oota-llvm.git / blobdiff