66 lines
3.1 KiB
LLVM
66 lines
3.1 KiB
LLVM
; RUN: opt -loop-unroll -unroll-allow-partial -S %s -verify-loop-info -verify-dom-info -verify-loop-lcssa | FileCheck %s
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@table = internal unnamed_addr global [344 x i32] zeroinitializer, align 16
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define i32 @test_partial_unroll_with_breakout_at_iter0() {
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; CHECK-LABEL: define i32 @test_partial_unroll_with_breakout_at_iter0() {
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; CHECK-LABEL: entry:
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; CHECK-NEXT: br label %for.header
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; CHECK-LABEL: for.header: ; preds = %for.latch.3, %entry
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; CHECK-NEXT: %red = phi i32 [ 0, %entry ], [ %red.next.3, %for.latch.3 ]
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; CHECK-NEXT: %iv = phi i64 [ 0, %entry ], [ %iv.next.3, %for.latch.3 ]
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; CHECK-NEXT: %red.next = add nuw nsw i32 10, %red
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; CHECK-NEXT: %iv.next = add nuw nsw i64 %iv, 2
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; CHECK-NEXT: %ptr = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next
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; CHECK-NEXT: store i32 %red.next, i32* %ptr, align 4
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; CHECK-NEXT: br label %for.latch
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; CHECK-LABEL: for.latch: ; preds = %for.header
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; CHECK-NEXT: %red.next.1 = add nuw nsw i32 10, %red.next
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; CHECK-NEXT: %iv.next.1 = add nuw nsw i64 %iv.next, 2
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; CHECK-NEXT: %ptr.1 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.1
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; CHECK-NEXT: store i32 %red.next.1, i32* %ptr.1, align 4
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; CHECK-NEXT: br label %for.latch.1
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; CHECK-LABEL: exit: ; preds = %for.latch.2
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; CHECK-NEXT: ret i32 0
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; CHECK-LABEL: for.latch.1: ; preds = %for.latch
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; CHECK-NEXT: %red.next.2 = add nuw nsw i32 10, %red.next.1
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; CHECK-NEXT: %iv.next.2 = add nuw nsw i64 %iv.next.1, 2
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; CHECK-NEXT: %ptr.2 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.2
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; CHECK-NEXT: store i32 %red.next.2, i32* %ptr.2, align 4
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; CHECK-NEXT: br label %for.latch.2
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; CHECK-LABEL: for.latch.2: ; preds = %for.latch.1
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; CHECK-NEXT: %red.next.3 = add nuw nsw i32 10, %red.next.2
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; CHECK-NEXT: %iv.next.3 = add nuw nsw i64 %iv.next.2, 2
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; CHECK-NEXT: %ptr.3 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.3
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; CHECK-NEXT: store i32 %red.next.3, i32* %ptr.3, align 4
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; CHECK-NEXT: %exitcond.1.i.3 = icmp eq i64 %iv.next.3, 344
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; CHECK-NEXT: br i1 %exitcond.1.i.3, label %exit, label %for.latch.3
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; CHECK-LABEL: for.latch.3: ; preds = %for.latch.2
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; CHECK-NEXT: br label %for.header
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;
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entry:
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br label %for.header
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for.header: ; preds = %for.body28.i.for.body28.i_crit_edge, %for.body.i
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%red = phi i32 [ 0, %entry ], [ %red.next, %for.latch ]
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.latch ]
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%red.next = add i32 10, %red
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%iv.next = add nuw nsw i64 %iv, 2
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%ptr = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next
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store i32 %red.next, i32* %ptr, align 4
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%exitcond.1.i = icmp eq i64 %iv.next, 344
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br i1 %exitcond.1.i, label %exit, label %for.latch
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for.latch: ; preds = %for.header
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br label %for.header
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exit:
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ret i32 0
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}
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