76 lines
2.8 KiB
LLVM
76 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes='loop(indvars,loop-deletion),verify<scalar-evolution>,print<scalar-evolution>' -S %s 2>&1| FileCheck %s
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; Make sure the SCEV for %invar is invalidated properly when the instruction is
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; moved by LoopDeletion.
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; CHECK: Determining loop execution counts for: @test
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; CHECK-NEXT: Loop %inner: backedge-taken count is (405 + %invar)<nuw><nsw>
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; CHECK-NEXT: Loop %inner: max backedge-taken count is 405
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; CHECK-NEXT: Loop %inner: Predicated backedge-taken count is (405 + %invar)<nuw><nsw>
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define void @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
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; CHECK: outer.header:
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; CHECK-NEXT: br i1 true, label [[INNER_PH:%.*]], label [[OUTER_LATCH:%.*]]
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; CHECK: inner.ph:
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; CHECK-NEXT: [[INVAR:%.*]] = ashr i32 0, 3
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: [[P:%.*]] = phi i32 [ poison, [[INNER_PH]] ], [ [[INVAR]], [[INNER]] ]
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; CHECK-NEXT: [[INNER_IV:%.*]] = phi i32 [ 1, [[INNER_PH]] ], [ [[INNER_IV_NEXT:%.*]], [[INNER]] ]
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; CHECK-NEXT: [[ADD_1:%.*]] = add i32 [[P]], 30586
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; CHECK-NEXT: call void @use(i32 [[ADD_1]])
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; CHECK-NEXT: [[INNER_IV_NEXT]] = add nuw nsw i32 [[INNER_IV]], 1
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; CHECK-NEXT: [[INVAR_ADD:%.*]] = add i32 [[INVAR]], 407
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; CHECK-NEXT: [[INNER_CMP:%.*]] = icmp ult i32 [[INNER_IV_NEXT]], [[INVAR_ADD]]
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; CHECK-NEXT: br i1 [[INNER_CMP]], label [[INNER]], label [[INNER_EXIT:%.*]]
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; CHECK: inner.exit:
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; CHECK-NEXT: [[INVAR_LCSSA:%.*]] = phi i32 [ [[INVAR]], [[INNER]] ]
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; CHECK-NEXT: br label [[OUTER_LATCH]]
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; CHECK: outer.latch:
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; CHECK-NEXT: [[MERGE:%.*]] = phi i32 [ 0, [[OUTER_HEADER]] ], [ [[INVAR_LCSSA]], [[INNER_EXIT]] ]
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; CHECK-NEXT: call void @use(i32 [[MERGE]])
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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bb:
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br label %outer.header
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outer.header: ; preds = %bb19, %bb
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%outer.iv = phi i32 [ 0, %bb ], [ %tmp21, %outer.latch ]
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%outer.cmp = icmp ult i32 %outer.iv, 400
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br i1 %outer.cmp, label %inner.ph, label %outer.latch
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inner.ph:
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br label %inner
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inner:
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%p = phi i32 [ poison, %inner.ph ], [ %invar, %inner ]
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%inner.iv = phi i32 [ 1, %inner.ph ], [ %inner.iv.next , %inner ]
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%add.1 = add i32 %p, 30586
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call void @use(i32 %add.1)
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%invar = ashr i32 0, 3
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%inner.iv.next = add nuw nsw i32 %inner.iv, 1
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%invar.add = add i32 %invar, 407
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%inner.cmp = icmp slt i32 %inner.iv.next, %invar.add
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br i1 %inner.cmp, label %inner, label %inner.exit
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inner.exit:
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br label %outer.latch
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outer.latch:
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%merge = phi i32 [ 0, %outer.header ], [ %invar, %inner.exit ]
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call void @use(i32 %merge)
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%tmp21 = add i32 %outer.iv, 1
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br i1 true, label %exit, label %outer.header
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exit:
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ret void
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}
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declare void @use(i32)
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