forked from OSchip/llvm-project
85 lines
3.2 KiB
LLVM
85 lines
3.2 KiB
LLVM
; RUN: opt -S -loop-fusion -loop-fusion-peel-max-count=3 < %s | FileCheck %s
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; Tests if we are able to fuse two guarded loops which have constant but
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; different trip counts. The first two iterations of the first loop should be
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; peeled off, and then the loops should be fused together.
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@B = common global [1024 x i32] zeroinitializer, align 16
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; CHECK-LABEL: void @main(i32* noalias %A)
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; CHECK-NEXT: entry:
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; CHECK: br i1 %cmp4, label %for.first.entry, label %for.end
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; CHECK: for.first.entry
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; CHECK-NEXT: br label %for.first.peel.begin
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; CHECK: for.first.peel.begin:
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; CHECK-NEXT: br label %for.first.peel
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; CHECK: for.first.peel:
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; CHECK: br label %for.first.peel.next
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; CHECK: for.first.peel.next:
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; CHECK-NEXT: br label %for.first.peel2
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; CHECK: for.first.peel2:
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; CHECK: br label %for.first.peel.next1
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; CHECK: for.first.peel.next1:
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; CHECK-NEXT: br label %for.first.peel.next11
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; CHECK: for.first.peel.next11:
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; CHECK-NEXT: br label %for.first.entry.peel.newph
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; CHECK: for.first.entry.peel.newph:
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; CHECK: br label %for.first
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; CHECK: for.first:
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; CHECK: br i1 %cmp3, label %for.first, label %for.second.exit
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; CHECK: for.second.exit:
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; CHECK: br label %for.end
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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define void @main(i32* noalias %A) {
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entry:
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%cmp4 = icmp slt i64 0, 45
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br i1 %cmp4, label %for.first.entry, label %for.second.guard
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for.first.entry: ; preds = %entry
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br label %for.first
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for.first: ; preds = %for.first.entry, %for.first
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%i.05 = phi i64 [ %inc, %for.first ], [ 0, %for.first.entry ]
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%sub = sub nsw i64 %i.05, 3
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%add = add nsw i64 %i.05, 3
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%mul = mul nsw i64 %sub, %add
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%rem = srem i64 %mul, %i.05
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%conv = trunc i64 %rem to i32
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %i.05
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store i32 %conv, i32* %arrayidx, align 4
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%inc = add nsw i64 %i.05, 1
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%cmp = icmp slt i64 %inc, 45
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br i1 %cmp, label %for.first, label %for.first.exit
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for.first.exit: ; preds = %for.first
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br label %for.second.guard
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for.second.guard: ; preds = %for.first.exit, %entry
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%cmp31 = icmp slt i64 2, 45
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br i1 %cmp31, label %for.second.entry, label %for.end
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for.second.entry: ; preds = %for.second.guard
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br label %for.second
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for.second: ; preds = %for.second.entry, %for.second
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%i1.02 = phi i64 [ %inc14, %for.second ], [ 2, %for.second.entry ]
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%sub7 = sub nsw i64 %i1.02, 3
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%add8 = add nsw i64 %i1.02, 3
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%mul9 = mul nsw i64 %sub7, %add8
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%rem10 = srem i64 %mul9, %i1.02
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%conv11 = trunc i64 %rem10 to i32
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%arrayidx12 = getelementptr inbounds [1024 x i32], [1024 x i32]* @B, i64 0, i64 %i1.02
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store i32 %conv11, i32* %arrayidx12, align 4
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%inc14 = add nsw i64 %i1.02, 1
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%cmp3 = icmp slt i64 %inc14, 45
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br i1 %cmp3, label %for.second, label %for.second.exit
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for.second.exit: ; preds = %for.second
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br label %for.end
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for.end: ; preds = %for.second.exit, %for.second.guard
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ret void
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}
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