derek.holloway
7502bf64a4
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72 lines
2.2 KiB
LLVM
72 lines
2.2 KiB
LLVM
; RUN: opt %loadNPMPolly '-passes=polly-custom<scops>' -polly-print-scops -disable-output < %s 2>&1 | FileCheck %s
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;
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; void f(int *A, char N, char p) {
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; for (char i = 0; i < N; i++) {
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; A[i + 3] = 0;
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; }
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; }
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;
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; The wrap function has no inbounds GEP but the nowrap function has. Therefore,
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; we will add the assumption that i+1 won't overflow only to the former.
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;
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; CHECK: Function: wrap
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; CHECK: Invalid Context:
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; CHECK: [N] -> { : N >= 126 }
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;
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;
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; FIXME: This is a negative test as nowrap should not need an assumed context.
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; However %tmp5 in @nowrap is translated to the SCEV <3,+,1><nw><%bb2>
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; which lacks the <nsw> flags we would need to avoid runtime checks.
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;
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; CHECK: Function: nowrap
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; CHECK: Invalid Context:
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; CHECK-NOT: [N] -> { : }
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;
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define void @wrap(ptr %A, i8 %N, i8 %p) {
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bb:
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br label %bb2
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bb2: ; preds = %bb7, %bb
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%indvars.iv = phi i8 [ %indvars.iv.next, %bb7 ], [ 0, %bb ]
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%tmp3 = icmp slt i8 %indvars.iv, %N
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br i1 %tmp3, label %bb4, label %bb8
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bb4: ; preds = %bb2
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%tmp5 = add i8 %indvars.iv, 3
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%tmp6 = getelementptr i32, ptr %A, i8 %tmp5
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store i32 0, ptr %tmp6, align 4
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br label %bb7
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bb7: ; preds = %bb4
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%indvars.iv.next = add nsw nuw i8 %indvars.iv, 1
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br label %bb2
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bb8: ; preds = %bb2
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ret void
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}
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define void @nowrap(ptr %A, i8 %N, i8 %p) {
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bb:
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br label %bb2
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bb2: ; preds = %bb7, %bb
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%indvars.iv = phi i8 [ %indvars.iv.next, %bb7 ], [ 0, %bb ]
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%tmp3 = icmp slt i8 %indvars.iv, %N
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br i1 %tmp3, label %bb4, label %bb8
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bb4: ; preds = %bb2
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%tmp5 = add nsw nuw i8 %indvars.iv, 3
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%tmp6 = getelementptr inbounds i32, ptr %A, i8 %tmp5
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store i32 0, ptr %tmp6, align 4
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br label %bb7
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bb7: ; preds = %bb4
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%indvars.iv.next = add nsw nuw i8 %indvars.iv, 1
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br label %bb2
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bb8: ; preds = %bb2
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ret void
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}
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