066dbf3f8e
In order to speed up compile time and to avoid random timeouts we now separately track assumptions and restrictions. In this context assumptions describe parameter valuations we need and restrictions describe parameter valuations we do not allow. During AST generation we create a runtime check for both, whereas the one for the restrictions is negated before a conjunction is build. Except the In-Bounds assumptions we currently only track restrictions. Differential Revision: http://reviews.llvm.org/D17247 llvm-svn: 262328
72 lines
2.2 KiB
LLVM
72 lines
2.2 KiB
LLVM
; RUN: opt %loadPolly -polly-scops -analyze < %s | 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-i8:64-f80:128-n8:16:32:64-S128"
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define void @wrap(i32* %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, i32* %A, i8 %tmp5
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store i32 0, i32* %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(i32* %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, i32* %A, i8 %tmp5
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store i32 0, i32* %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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