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https://github.com/c64scene-ar/llvm-6502.git
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d10aa6f8b2
hint) the loop unroller replaces the llvm.loop.unroll.count metadata with llvm.loop.unroll.disable metadata to prevent any subsequent unrolling passes from unrolling more than the hint indicates. This patch fixes an issue where loop unrolling could be disabled for other loops as well which share the same llvm.loop metadata. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213900 91177308-0d34-0410-b5e6-96231b3b80d8
150 lines
6.3 KiB
LLVM
150 lines
6.3 KiB
LLVM
; RUN: opt < %s -loop-unroll -S | FileCheck %s
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;
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; Verify that the unrolling pass removes existing unroll count metadata
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; and adds a disable unrolling node after unrolling is complete.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; #pragma clang loop vectorize(enable) unroll_count(4) vectorize_width(8)
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;
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; Unroll count metadata should be replaced with unroll(disable). Vectorize
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; metadata should be untouched.
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;
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; CHECK-LABEL: @unroll_count_4(
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
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define void @unroll_count_4(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
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%0 = load i32* %arrayidx, align 4
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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 64
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !1
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for.end: ; preds = %for.body
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ret void
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}
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!1 = metadata !{metadata !1, metadata !2, metadata !3, metadata !4}
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!2 = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true}
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!3 = metadata !{metadata !"llvm.loop.unroll.count", i32 4}
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!4 = metadata !{metadata !"llvm.loop.vectorize.width", i32 8}
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; #pragma clang loop unroll(full)
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;
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; An unroll disable metadata node is only added for the unroll count case.
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; In this case, the loop has a full unroll metadata but can't be fully unrolled
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; because the trip count is dynamic. The full unroll metadata should remain
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; after unrolling.
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;
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; CHECK-LABEL: @unroll_full(
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
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define void @unroll_full(i32* nocapture %a, i32 %b) {
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entry:
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%cmp3 = icmp sgt i32 %b, 0
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br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !5
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
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%0 = load i32* %arrayidx, align 4
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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %b
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !5
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for.end: ; preds = %for.body, %entry
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ret void
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}
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!5 = metadata !{metadata !5, metadata !6}
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!6 = metadata !{metadata !"llvm.loop.unroll.full"}
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; #pragma clang loop unroll(disable)
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;
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; Unroll metadata should not change.
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;
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; CHECK-LABEL: @unroll_disable(
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
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define void @unroll_disable(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
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%0 = load i32* %arrayidx, align 4
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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 64
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !7
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for.end: ; preds = %for.body
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ret void
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}
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!7 = metadata !{metadata !7, metadata !8}
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!8 = metadata !{metadata !"llvm.loop.unroll.disable"}
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; This function contains two loops which share the same llvm.loop metadata node
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; with an llvm.loop.unroll.count 2 hint. Both loops should be unrolled. This
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; verifies that adding disable metadata to a loop after unrolling doesn't affect
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; other loops which previously shared the same llvm.loop metadata.
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;
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; CHECK-LABEL: @shared_metadata(
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; CHECK: store i32
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; CHECK: store i32
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_4:.*]]
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; CHECK: store i32
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; CHECK: store i32
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_5:.*]]
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define void @shared_metadata(i32* nocapture %List) #0 {
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entry:
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br label %for.body3
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for.body3: ; preds = %for.body3, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body3 ]
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%arrayidx = getelementptr inbounds i32* %List, i64 %indvars.iv
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%0 = load i32* %arrayidx, align 4
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%add4 = add nsw i32 %0, 10
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store i32 %add4, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 4
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br i1 %exitcond, label %for.body3.1.preheader, label %for.body3, !llvm.loop !9
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for.body3.1.preheader: ; preds = %for.body3
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br label %for.body3.1
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for.body3.1: ; preds = %for.body3.1.preheader, %for.body3.1
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%indvars.iv.1 = phi i64 [ %1, %for.body3.1 ], [ 0, %for.body3.1.preheader ]
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%1 = add nsw i64 %indvars.iv.1, 1
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%arrayidx.1 = getelementptr inbounds i32* %List, i64 %1
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%2 = load i32* %arrayidx.1, align 4
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%add4.1 = add nsw i32 %2, 10
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store i32 %add4.1, i32* %arrayidx.1, align 4
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%exitcond.1 = icmp eq i64 %1, 4
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br i1 %exitcond.1, label %for.inc5.1, label %for.body3.1, !llvm.loop !9
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for.inc5.1: ; preds = %for.body3.1
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ret void
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}
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!9 = metadata !{metadata !9, metadata !10}
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!10 = metadata !{metadata !"llvm.loop.unroll.count", i32 2}
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; CHECK: ![[LOOP_1]] = metadata !{metadata ![[LOOP_1]], metadata ![[VEC_ENABLE:.*]], metadata ![[WIDTH_8:.*]], metadata ![[UNROLL_DISABLE:.*]]}
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; CHECK: ![[VEC_ENABLE]] = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true}
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; CHECK: ![[WIDTH_8]] = metadata !{metadata !"llvm.loop.vectorize.width", i32 8}
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; CHECK: ![[UNROLL_DISABLE]] = metadata !{metadata !"llvm.loop.unroll.disable"}
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; CHECK: ![[LOOP_2]] = metadata !{metadata ![[LOOP_2]], metadata ![[UNROLL_FULL:.*]]}
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; CHECK: ![[UNROLL_FULL]] = metadata !{metadata !"llvm.loop.unroll.full"}
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; CHECK: ![[LOOP_3]] = metadata !{metadata ![[LOOP_3]], metadata ![[UNROLL_DISABLE:.*]]}
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; CHECK: ![[LOOP_4]] = metadata !{metadata ![[LOOP_4]], metadata ![[UNROLL_DISABLE:.*]]}
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; CHECK: ![[LOOP_5]] = metadata !{metadata ![[LOOP_5]], metadata ![[UNROLL_DISABLE:.*]]}
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