43 lines
1.0 KiB
LLVM
43 lines
1.0 KiB
LLVM
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; RUN: opt -verify-loop-info -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
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; CHECK-LABEL: irce: in function test_01: constrained Loop at depth 2 containing:
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define void @test_01(i64 %len) {
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; CHECK-LABEL: @test_01(
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entry:
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br label %loop
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check:
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%entry_check = icmp eq i32 %idx.next, 0
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br i1 %entry_check, label %exit, label %loop
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loop:
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%idx = phi i32 [ 1, %entry ], [ %idx.next, %check ]
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%idx_ext = sext i32 %idx to i64
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br label %inner_loop
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inner_loop:
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%iv = phi i64 [ 0, %loop ], [ %iv.next, %inner_backedge ]
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%iv.next = add nuw nsw i64 %iv, 1
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%inner_check = icmp slt i64 %iv.next, %idx_ext
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br i1 %inner_check, label %inner, label %outer_check
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inner:
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%iv_next_check = icmp slt i64 %iv.next, 100
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br i1 %iv_next_check, label %inner_backedge, label %exit
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inner_backedge:
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%cond = icmp eq i64 %iv.next, 100
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br i1 %cond, label %exit, label %inner_loop
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outer_check:
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%idx.next = add i32 %idx, 1
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%loopdone = icmp slt i32 %idx.next, 2
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br i1 %loopdone, label %check, label %exit
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exit:
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ret void
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}
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