forked from OSchip/llvm-project
70 lines
2.9 KiB
LLVM
70 lines
2.9 KiB
LLVM
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; RUN: opt < %s -loop-unroll -S | FileCheck %s
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;
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; Verify that the unrolling pass removes existing loop unrolling 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(enable) unroll_count(4) vectorize_width(8)
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;
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; Unroll metadata should be replaces with unroll(disable). Vectorize
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; metadata should be untouched.
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;
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; CHECK-LABEL: @loop1(
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
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define void @loop1(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, metadata !5}
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!2 = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true}
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!3 = metadata !{metadata !"llvm.loop.unroll.enable", i1 true}
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!4 = metadata !{metadata !"llvm.loop.unroll.count", i32 4}
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!5 = metadata !{metadata !"llvm.loop.vectorize.width", i32 8}
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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: @loop2(
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; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
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define void @loop2(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 !6
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for.end: ; preds = %for.body
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ret void
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}
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!6 = metadata !{metadata !6, metadata !7}
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!7 = metadata !{metadata !"llvm.loop.unroll.enable", i1 false}
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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.enable", i1 false}
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; CHECK: ![[LOOP_2]] = metadata !{metadata ![[LOOP_2]], metadata ![[UNROLL_DISABLE:.*]]}
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