48 lines
1.9 KiB
LLVM
48 lines
1.9 KiB
LLVM
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; RUN: opt -loop-simplify -S < %s | FileCheck %s
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; This will test whether or not the metadata from the current loop 1 latch
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; is removed, and applied to the new latch after running the loop-simplify
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; pass on this function. The loop simplify pass ensures that each loop has exit
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; blocks which only have predecessors that are inside of the loop. This
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; guarantees that the loop preheader/header will dominate the exit blocks. For
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; this function currently loop 2 does not have a dedicated exit block.
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; CHECK: loop_1_loopHeader.loopexit:
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; CHECK: br label %loop_1_loopHeader, !llvm.loop [[LOOP_1_LATCH_MD:![0-9]+]]
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; CHECK: loop_2_loopHeader
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; CHECK: br i1 %grt_B, label %loop_1_loopHeader.loopexit, label %loop_2_do
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; CHECK-NOT: br i1 %grt_B, label %loop_1_loopHeader, label %loop_2_do, !llvm.loop{{.*}}
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define void @function(i32 %A) {
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entry:
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%B = add i32 %A, 45
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%C = add i32 %A, 22
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br label %loop_1_loopHeader
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loop_1_loopHeader: ; preds = %loop_2_loopHeader, %entry
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%loop_1_idx = phi i32 [ 1, %entry], [ %loop_1_update_idx, %loop_2_loopHeader ]
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%grt_C = icmp slt i32 %loop_1_idx, %C
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br i1 %grt_C, label %exit, label %loop_1_do
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loop_1_do: ; preds = %loop_1_loopHeader
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%loop_1_update_idx = add nuw nsw i32 %loop_1_idx, 1
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br label %loop_2_loopHeader
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loop_2_loopHeader: ; preds = %loop_2_do, %_loop_1_do
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%loop_2_idx = phi i32 [ 1, %loop_1_do ], [ %loop_2_update_idx, %loop_2_do ]
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%grt_B = icmp slt i32 %loop_2_idx, %B
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br i1 %grt_B, label %loop_1_loopHeader, label %loop_2_do, !llvm.loop !0
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loop_2_do: ; preds = %loop_2_loopHeader
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%loop_2_update_idx = add nuw nsw i32 %loop_2_idx, 1
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br label %loop_2_loopHeader, !llvm.loop !2
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exit: ; preds = %loop_1_loopHeader
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ret void
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}
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!0 = distinct !{!0, !1}
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!1 = !{!"llvm.loop.unroll.disable"}
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!2 = distinct !{!2, !1}
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