65 lines
2.7 KiB
LLVM
65 lines
2.7 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -loop-idiom -S %s | FileCheck %s
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; Make sure we do not delete instructions not inserted during expansion, e.g.
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; because the expande re-used existing instructions.
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define void @test(i64 %init, float* %ptr) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
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; CHECK: outer.header:
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; CHECK-NEXT: [[J_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[OUTER_LATCH:%.*]] ]
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; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[OUTER_LATCH]] ]
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; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds float, float* [[PTR:%.*]], i32 [[I_0]]
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: [[INNER_IV:%.*]] = phi i64 [ [[INNER_IV_NEXT:%.*]], [[INNER]] ], [ [[INIT:%.*]], [[OUTER_HEADER]] ]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, float* [[PTR]], i64 [[INNER_IV]]
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast float* [[ARRAYIDX]] to i32*
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[TMP0]], align 4
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; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[ADD_PTR]], i64 [[INNER_IV]]
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast float* [[ARRAYIDX3]] to i32*
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; CHECK-NEXT: store i32 [[TMP1]], i32* [[TMP2]], align 4
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; CHECK-NEXT: [[INNER_IV_NEXT]] = add nsw i64 [[INNER_IV]], 1
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; CHECK-NEXT: [[EC_1:%.*]] = icmp eq i64 [[INNER_IV_NEXT]], 0
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; CHECK-NEXT: br i1 [[EC_1]], label [[OUTER_LATCH]], label [[INNER]]
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; CHECK: outer.latch:
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[J_0]], 1
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; CHECK-NEXT: [[ADD]] = add nuw nsw i32 [[I_0]], [[INC]]
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; CHECK-NEXT: [[EC_2:%.*]] = icmp eq i32 [[ADD]], 4000
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; CHECK-NEXT: br i1 [[EC_2]], label [[EXIT:%.*]], label [[OUTER_HEADER]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %outer.header
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outer.header:
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%j.0 = phi i32 [ 0, %entry ], [ %inc, %outer.latch ]
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%i.0 = phi i32 [ 0, %entry ], [ %add, %outer.latch ]
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%add.ptr = getelementptr inbounds float, float* %ptr, i32 %i.0
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br label %inner
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inner:
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%inner.iv = phi i64 [ %inner.iv.next, %inner ], [ %init, %outer.header ]
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%arrayidx = getelementptr inbounds float, float* %ptr, i64 %inner.iv
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%0 = bitcast float* %arrayidx to i32*
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%1 = load i32, i32* %0, align 4
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%arrayidx3 = getelementptr inbounds float, float* %add.ptr, i64 %inner.iv
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%2 = bitcast float* %arrayidx3 to i32*
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store i32 %1, i32* %2, align 4
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%inner.iv.next = add nsw i64 %inner.iv, 1
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%ec.1 = icmp eq i64 %inner.iv.next, 0
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br i1 %ec.1, label %outer.latch, label %inner
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outer.latch:
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%inc = add nuw nsw i32 %j.0, 1
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%add = add nuw nsw i32 %i.0, %inc
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%ec.2 = icmp eq i32 %add, 4000
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br i1 %ec.2, label %exit, label %outer.header
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exit:
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ret void
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}
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