forked from OSchip/llvm-project
81 lines
2.5 KiB
LLVM
81 lines
2.5 KiB
LLVM
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
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;
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; void f(long *A, long N, long p) {
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; for (long i = 0; i < N; i++)
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; A[i + 1] = 0;
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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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; Note:
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; 1152921504606846975 * sizeof(long) <= 2 ^ 63 - 1
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; and
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; 1152921504606846976 * sizeof(long) > 2 ^ 63 - 1
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; with
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; sizeof(long) == 8
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;
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; CHECK: Function: wrap
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; CHECK: Invalid Context:
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; CHECK-NEXT: [N] -> { : N >= 1152921504606846976 }
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;
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; CHECK: Function: nowrap
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; CHECK: Invalid Context:
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; CHECK-NEXT: [N] -> { : false }
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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(i64* %A, i64 %N, i64 %p) {
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bb:
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%tmp31 = icmp slt i64 0, %N
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br i1 %tmp31, label %bb4.lr.ph, label %bb8
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bb4.lr.ph: ; preds = %bb
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br label %bb4
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bb4: ; preds = %bb4.lr.ph, %bb7
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%indvars.iv2 = phi i64 [ 0, %bb4.lr.ph ], [ %indvars.iv.next, %bb7 ]
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%tmp5 = add nuw nsw i64 %indvars.iv2, 1
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%tmp6 = getelementptr i64, i64* %A, i64 %tmp5
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store i64 0, i64* %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 nuw nsw i64 %indvars.iv2, 1
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%tmp3 = icmp slt i64 %indvars.iv.next, %N
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br i1 %tmp3, label %bb4, label %bb2.bb8_crit_edge
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bb2.bb8_crit_edge: ; preds = %bb7
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br label %bb8
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bb8: ; preds = %bb2.bb8_crit_edge, %bb
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ret void
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}
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define void @nowrap(i64* %A, i64 %N, i64 %p) {
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bb:
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%tmp31 = icmp slt i64 0, %N
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br i1 %tmp31, label %bb4.lr.ph, label %bb8
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bb4.lr.ph: ; preds = %bb
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br label %bb4
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bb4: ; preds = %bb4.lr.ph, %bb7
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%indvars.iv2 = phi i64 [ 0, %bb4.lr.ph ], [ %indvars.iv.next, %bb7 ]
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%tmp5 = add nuw nsw i64 %indvars.iv2, 1
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%tmp6 = getelementptr inbounds i64, i64* %A, i64 %tmp5
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store i64 0, i64* %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 nuw nsw i64 %indvars.iv2, 1
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%tmp3 = icmp slt i64 %indvars.iv.next, %N
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br i1 %tmp3, label %bb4, label %bb2.bb8_crit_edge
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bb2.bb8_crit_edge: ; preds = %bb7
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br label %bb8
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bb8: ; preds = %bb2.bb8_crit_edge, %bb
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ret void
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}
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