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1021236c74
unsigned overflow (e.g. "gep P, -1"), and while they can have signed wrap in theoretical situations, modelling an AddRec as not having signed wrap is going enough for any case we can think of today. In the future if this isn't enough, we can revisit this. Modeling them as having NUW isn't causing any known problems either FWIW. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125410 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
2.9 KiB
LLVM
79 lines
2.9 KiB
LLVM
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
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; The addrecs in this loop are analyzable only by using nsw information.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64"
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; CHECK: Classifying expressions for: @test1
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define void @test1(double* %p) nounwind {
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entry:
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%tmp = load double* %p, align 8 ; <double> [#uses=1]
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%tmp1 = fcmp ogt double %tmp, 2.000000e+00 ; <i1> [#uses=1]
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br i1 %tmp1, label %bb.nph, label %return
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb1, %bb.nph
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%i.01 = phi i32 [ %tmp8, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=3]
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; CHECK: %i.01
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%bb>
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%tmp2 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
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%tmp3 = getelementptr double* %p, i64 %tmp2 ; <double*> [#uses=1]
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%tmp4 = load double* %tmp3, align 8 ; <double> [#uses=1]
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%tmp5 = fmul double %tmp4, 9.200000e+00 ; <double> [#uses=1]
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%tmp6 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
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%tmp7 = getelementptr double* %p, i64 %tmp6 ; <double*> [#uses=1]
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; CHECK: %tmp7
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; CHECK-NEXT: --> {%p,+,8}<%bb>
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store double %tmp5, double* %tmp7, align 8
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%tmp8 = add nsw i32 %i.01, 1 ; <i32> [#uses=2]
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; CHECK: %tmp8
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb>
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br label %bb1
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bb1: ; preds = %bb
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%phitmp = sext i32 %tmp8 to i64 ; <i64> [#uses=1]
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; CHECK: %phitmp
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; CHECK-NEXT: --> {1,+,1}<%bb>
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%tmp9 = getelementptr double* %p, i64 %phitmp ; <double*> [#uses=1]
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; CHECK: %tmp9
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; CHECK-NEXT: --> {(8 + %p),+,8}<%bb>
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%tmp10 = load double* %tmp9, align 8 ; <double> [#uses=1]
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%tmp11 = fcmp ogt double %tmp10, 2.000000e+00 ; <i1> [#uses=1]
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br i1 %tmp11, label %bb, label %bb1.return_crit_edge
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bb1.return_crit_edge: ; preds = %bb1
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br label %return
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return: ; preds = %bb1.return_crit_edge, %entry
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ret void
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}
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; CHECK: Classifying expressions for: @test2
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define void @test2(i32* %begin, i32* %end) ssp {
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entry:
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%cmp1.i.i = icmp eq i32* %begin, %end
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br i1 %cmp1.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.lr.ph.i.i
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for.body.lr.ph.i.i: ; preds = %entry
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br label %for.body.i.i
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for.body.i.i: ; preds = %for.body.i.i, %for.body.lr.ph.i.i
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%__first.addr.02.i.i = phi i32* [ %begin, %for.body.lr.ph.i.i ], [ %ptrincdec.i.i, %for.body.i.i ]
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; CHECK: %__first.addr.02.i.i
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; CHECK-NEXT: --> {%begin,+,4}<nsw><%for.body.i.i>
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store i32 0, i32* %__first.addr.02.i.i, align 4
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%ptrincdec.i.i = getelementptr inbounds i32* %__first.addr.02.i.i, i64 1
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; CHECK: %ptrincdec.i.i
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; CHECK-NEXT: --> {(4 + %begin),+,4}<nsw><%for.body.i.i>
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%cmp.i.i = icmp eq i32* %ptrincdec.i.i, %end
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br i1 %cmp.i.i, label %for.cond.for.end_crit_edge.i.i, label %for.body.i.i
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for.cond.for.end_crit_edge.i.i: ; preds = %for.body.i.i
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br label %_ZSt4fillIPiiEvT_S1_RKT0_.exit
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_ZSt4fillIPiiEvT_S1_RKT0_.exit: ; preds = %entry, %for.cond.for.end_crit_edge.i.i
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ret void
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}
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