derek.holloway
7502bf64a4
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39 lines
1.5 KiB
LLVM
39 lines
1.5 KiB
LLVM
; RUN: opt -passes='print<access-info>' -disable-output < %s 2>&1 | FileCheck %s
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; Test that the loop accesses are proven safe in this case.
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; The analyzer uses to be confused by the "diamond" because getUnderlyingObjects
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; is saying that the two pointers can both points to null. The loop analyzer
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; needs to ignore null in the results returned by getUnderlyingObjects.
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; CHECK: Memory dependences are safe with run-time checks
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; ModuleID = 'bugpoint-reduced-simplified.bc'
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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; Function Attrs: ssp uwtable
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define void @foo(i1 %cond, ptr %ptr1, ptr %ptr2) {
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br i1 %cond, label %.preheader, label %diamond
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diamond: ; preds = %.noexc.i.i
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br label %.preheader
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.preheader: ; preds = %diamond, %0
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%ptr1_or_null = phi ptr [ null, %0 ], [ %ptr1, %diamond ]
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%ptr2_or_null = phi ptr [ null, %0 ], [ %ptr2, %diamond ]
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br label %.lr.ph
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.lr.ph: ; preds = %.lr.ph, %.preheader
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%indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 10, %.preheader ]
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%indvars.iv.next = add nsw i64 %indvars.iv, -1
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%tmp4 = getelementptr inbounds i32, ptr %ptr2_or_null, i64 %indvars.iv.next
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%tmp5 = load i32, ptr %tmp4, align 4
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%tmp6 = getelementptr inbounds i32, ptr %ptr1_or_null, i64 %indvars.iv.next
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store i32 undef, ptr %tmp6, align 4
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br i1 false, label %.lr.ph, label %.end
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.end:
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ret void
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}
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