forked from OSchip/llvm-project
85 lines
3.4 KiB
LLVM
85 lines
3.4 KiB
LLVM
; RUN: opt -S -loop-fusion -loop-fusion-peel-max-count=3 < %s | FileCheck %s
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; Tests that we do not fuse these two loops together. These loops do not have
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; the same tripcount, and the first loop is valid candiate for peeling; however
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; the loops are not adjacent, hence they are not valid to be fused (after
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; peeling).
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; The expected output of this test is the function below.
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; CHECK-LABEL: void @function(i32* noalias %arg)
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; CHECK-NEXT: for.first.preheader:
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; CHECK-NEXT: br label %for.first
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; CHECK: for.first:
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; CHECK: br label %for.first.latch
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; CHECK: for.first.latch:
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; CHECK: br i1 %exitcond4, label %for.first, label %for.first.exit
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; CHECK: for.first.exit:
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; CHECK-NEXT: br label %for.next
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; CHECK: for.next:
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; CHECK-NEXT: br label %for.second.preheader
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; CHECK: for.second.preheader:
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; CHECK: br label %for.second
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; CHECK: for.second:
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; CHECK: br label %for.second.latch
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; CHECK: for.second.latch:
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; CHECK: br i1 %exitcond, label %for.second, label %for.end
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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@B = common global [1024 x i32] zeroinitializer, align 16
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define void @function(i32* noalias %arg) {
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for.first.preheader:
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br label %for.first
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for.first: ; preds = %for.first.preheader, %for.first.latch
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%.014 = phi i32 [ 0, %for.first.preheader ], [ %tmp15, %for.first.latch ]
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%indvars.iv23 = phi i64 [ 0, %for.first.preheader ], [ %indvars.iv.next3, %for.first.latch ]
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%tmp = add nsw i32 %.014, -3
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%tmp8 = add nuw nsw i64 %indvars.iv23, 3
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%tmp9 = trunc i64 %tmp8 to i32
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%tmp10 = mul nsw i32 %tmp, %tmp9
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%tmp11 = trunc i64 %indvars.iv23 to i32
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%tmp12 = srem i32 %tmp10, %tmp11
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%tmp13 = getelementptr inbounds i32, i32* %arg, i64 %indvars.iv23
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store i32 %tmp12, i32* %tmp13, align 4
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br label %for.first.latch
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for.first.latch: ; preds = %for.first
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%indvars.iv.next3 = add nuw nsw i64 %indvars.iv23, 1
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%tmp15 = add nuw nsw i32 %.014, 1
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%exitcond4 = icmp ne i64 %indvars.iv.next3, 100
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br i1 %exitcond4, label %for.first, label %for.first.exit
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for.first.exit: ; preds: %for.first.latch
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br label %for.next
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for.next: ; preds = %for.first.exit
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br label %for.second.preheader
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for.second.preheader: ; preds = %for.next
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br label %for.second
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for.second: ; preds = %for.second.preheader, %for.second.latch
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%.02 = phi i32 [ 0, %for.second.preheader ], [ %tmp28, %for.second.latch ]
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%indvars.iv1 = phi i64 [ 3, %for.second.preheader ], [ %indvars.iv.next, %for.second.latch ]
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%tmp20 = add nsw i32 %.02, -3
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%tmp21 = add nuw nsw i64 %indvars.iv1, 3
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%tmp22 = trunc i64 %tmp21 to i32
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%tmp23 = mul nsw i32 %tmp20, %tmp22
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%tmp24 = trunc i64 %indvars.iv1 to i32
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%tmp25 = srem i32 %tmp23, %tmp24
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%tmp26 = getelementptr inbounds [1024 x i32], [1024 x i32]* @B, i64 0, i64 %indvars.iv1
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store i32 %tmp25, i32* %tmp26, align 4
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br label %for.second.latch
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for.second.latch: ; preds = %for.second
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%indvars.iv.next = add nuw nsw i64 %indvars.iv1, 1
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%tmp28 = add nuw nsw i32 %.02, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 100
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br i1 %exitcond, label %for.second, label %for.end
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for.end: ; preds = %for.second.latch
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ret void
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}
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