b1c2f1282a
D91936 placed the tracking for the assumptions into BasicAA. However, when recursing over phis, we may use fresh AAQI instances. In this case AssumptionBasedResults from an inner AAQI can reesult in a removal of an element from the outer AAQI. To avoid this, move the tracking into AAQI. This generally makes more sense, as the NoAlias assumptions themselves are also stored in AAQI. The test case only produces an assertion failure with D90094 reapplied. I think the issue exists independently of that change as well, but I wasn't able to come up with a reproducer.
87 lines
4.3 KiB
LLVM
87 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -scoped-noalias-aa -memcpyopt < %s | FileCheck %s
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; ModuleID = '<stdin>'
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source_filename = "test.cpp"
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-unknown-linux-android21"
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define dso_local void @_Z1ml(i64 %e) {
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; CHECK-LABEL: @_Z1ml(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[L:%.*]] = alloca i8, align 1
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; CHECK-NEXT: br label [[WHILE_COND:%.*]]
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; CHECK: for.cond.while.cond.loopexit_crit_edge.us-lcssa:
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; CHECK-NEXT: br label [[WHILE_COND_LOOPEXIT:%.*]]
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; CHECK: while.cond.loopexit:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i8* [ [[ADD_PTR_I:%.*]], [[FOR_COND_WHILE_COND_LOOPEXIT_CRIT_EDGE_US_LCSSA:%.*]] ], [ [[TMP1:%.*]], [[WHILE_COND]] ]
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; CHECK-NEXT: [[I_1_LCSSA:%.*]] = phi i8* [ [[I_2:%.*]], [[FOR_COND_WHILE_COND_LOOPEXIT_CRIT_EDGE_US_LCSSA]] ], [ [[I_0:%.*]], [[WHILE_COND]] ]
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; CHECK-NEXT: br label [[WHILE_COND]]
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; CHECK: while.cond:
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; CHECK-NEXT: [[TMP1]] = phi i8* [ [[L]], [[ENTRY:%.*]] ], [ [[TMP0]], [[WHILE_COND_LOOPEXIT]] ]
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; CHECK-NEXT: [[I_0]] = phi i8* [ [[L]], [[ENTRY]] ], [ [[I_1_LCSSA]], [[WHILE_COND_LOOPEXIT]] ]
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; CHECK-NEXT: br i1 undef, label [[FOR_BODY_LR_PH:%.*]], label [[WHILE_COND_LOOPEXIT]]
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; CHECK: for.body.lr.ph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[TMP2:%.*]] = phi i8* [ [[TMP1]], [[FOR_BODY_LR_PH]] ], [ [[ADD_PTR_I]], [[IF_END5:%.*]] ]
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; CHECK-NEXT: [[I_15:%.*]] = phi i8* [ [[I_0]], [[FOR_BODY_LR_PH]] ], [ [[I_2]], [[IF_END5]] ]
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; CHECK-NEXT: [[ADD_PTR_I]] = getelementptr inbounds i8, i8* [[TMP2]], i64 [[E:%.*]]
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; CHECK-NEXT: [[TMP3:%.*]] = load i8, i8* [[TMP2]], align 1, !noalias !0
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; CHECK-NEXT: [[TMP4:%.*]] = load i8, i8* [[I_15]], align 1, !alias.scope !0
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; CHECK-NEXT: store i8 [[TMP4]], i8* [[TMP2]], align 1
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; CHECK-NEXT: br label [[_Z1DPCS_L_EXIT:%.*]]
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; CHECK: _Z1dPcS_l.exit:
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; CHECK-NEXT: br i1 undef, label [[IF_THEN3:%.*]], label [[IF_END5]]
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; CHECK: if.then3:
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; CHECK-NEXT: [[ADD_PTR4:%.*]] = getelementptr inbounds i8, i8* [[I_15]], i64 [[E]]
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; CHECK-NEXT: br label [[IF_END5]]
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; CHECK: if.end5:
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; CHECK-NEXT: [[I_2]] = phi i8* [ [[ADD_PTR4]], [[IF_THEN3]] ], [ [[I_15]], [[_Z1DPCS_L_EXIT]] ]
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; CHECK-NEXT: br i1 false, label [[FOR_BODY]], label [[FOR_COND_WHILE_COND_LOOPEXIT_CRIT_EDGE_US_LCSSA]]
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;
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entry:
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%l = alloca i8, align 1
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br label %while.cond
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for.cond.while.cond.loopexit_crit_edge.us-lcssa: ; preds = %if.end5
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br label %while.cond.loopexit
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while.cond.loopexit: ; preds = %while.cond, %for.cond.while.cond.loopexit_crit_edge.us-lcssa
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%0 = phi i8* [ %add.ptr.i, %for.cond.while.cond.loopexit_crit_edge.us-lcssa ], [ %1, %while.cond ]
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%i.1.lcssa = phi i8* [ %i.2, %for.cond.while.cond.loopexit_crit_edge.us-lcssa ], [ %i.0, %while.cond ]
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br label %while.cond
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while.cond: ; preds = %while.cond.loopexit, %entry
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%1 = phi i8* [ %l, %entry ], [ %0, %while.cond.loopexit ]
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%i.0 = phi i8* [ %l, %entry ], [ %i.1.lcssa, %while.cond.loopexit ]
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br i1 undef, label %for.body.lr.ph, label %while.cond.loopexit
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for.body.lr.ph: ; preds = %while.cond
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br label %for.body
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for.body: ; preds = %if.end5, %for.body.lr.ph
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%2 = phi i8* [ %1, %for.body.lr.ph ], [ %add.ptr.i, %if.end5 ]
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%i.15 = phi i8* [ %i.0, %for.body.lr.ph ], [ %i.2, %if.end5 ]
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%add.ptr.i = getelementptr inbounds i8, i8* %2, i64 %e
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%3 = load i8, i8* %2, align 1, !noalias !0
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%4 = load i8, i8* %i.15, align 1, !alias.scope !0
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store i8 %4, i8* %2, align 1
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br label %_Z1dPcS_l.exit
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_Z1dPcS_l.exit: ; preds = %for.body
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br i1 undef, label %if.then3, label %if.end5
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if.then3: ; preds = %_Z1dPcS_l.exit
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%add.ptr4 = getelementptr inbounds i8, i8* %i.15, i64 %e
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br label %if.end5
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if.end5: ; preds = %if.then3, %_Z1dPcS_l.exit
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%i.2 = phi i8* [ %add.ptr4, %if.then3 ], [ %i.15, %_Z1dPcS_l.exit ]
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br i1 false, label %for.body, label %for.cond.while.cond.loopexit_crit_edge.us-lcssa
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}
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!0 = !{!1}
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!1 = distinct !{!1, !2, !"_Z1dPcS_l: %h"}
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!2 = distinct !{!2, !"_Z1dPcS_l"}
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