| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py |
| ; RUN: opt -analyze -scalar-evolution < %s -enable-new-pm=0 | FileCheck %s |
| ; RUN: opt -passes='print<scalar-evolution>' < %s -disable-output 2>&1 | FileCheck %s |
| |
| @b = dso_local global i32 5, align 4 |
| @__const.f.g = private unnamed_addr constant [1 x [4 x i16]] [[4 x i16] [i16 1, i16 0, i16 0, i16 0]], align 2 |
| @a = common dso_local global i32 0, align 4 |
| @c = common dso_local global i32 0, align 4 |
| @d = common dso_local global i32 0, align 4 |
| @e = common dso_local global i32 0, align 4 |
| |
| ; When inner.loop is taken as an exiting block of outer.loop, we cannot use the |
| ; addrec of %storemerge1921.3, which is {3, +, -1}<inner.loop>, to calculate the |
| ; exit count because it doesn't belong to outer.loop. |
| define dso_local i32 @f() { |
| ; CHECK-LABEL: 'f' |
| ; CHECK-NEXT: Classifying expressions for: @f |
| ; CHECK-NEXT: %storemerge23 = phi i32 [ 3, %entry ], [ %dec16, %for.inc13.3 ] |
| ; CHECK-NEXT: --> {3,+,-1}<nsw><%outer.loop> U: [1,4) S: [1,4) Exits: <<Unknown>> LoopDispositions: { %outer.loop: Computable, %for.cond6: Invariant, %inner.loop: Invariant } |
| ; CHECK-NEXT: %storemerge1921 = phi i32 [ 3, %outer.loop ], [ %dec, %for.end ] |
| ; CHECK-NEXT: --> {3,+,-1}<nuw><nsw><%for.cond6> U: [3,4) S: [3,4) Exits: <<Unknown>> LoopDispositions: { %for.cond6: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %idxprom20 = zext i32 %storemerge1921 to i64 |
| ; CHECK-NEXT: --> {3,+,4294967295}<nuw><nsw><%for.cond6> U: [3,4) S: [3,4) Exits: <<Unknown>> LoopDispositions: { %for.cond6: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %arrayidx7 = getelementptr inbounds [1 x [4 x i16]], [1 x [4 x i16]]* @__const.f.g, i64 0, i64 0, i64 %idxprom20 |
| ; CHECK-NEXT: --> {(6 + @__const.f.g)<nuw>,+,8589934590}<nuw><%for.cond6> U: [6,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %for.cond6: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %i = load i16, i16* %arrayidx7, align 2 |
| ; CHECK-NEXT: --> %i U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond6: Variant, %outer.loop: Variant } |
| ; CHECK-NEXT: %storemerge1822.lcssa.ph = phi i32 [ 0, %for.cond6 ] |
| ; CHECK-NEXT: --> 0 U: [0,1) S: [0,1) |
| ; CHECK-NEXT: %storemerge1822.lcssa.ph32 = phi i32 [ 3, %inner.loop ] |
| ; CHECK-NEXT: --> 3 U: [3,4) S: [3,4) |
| ; CHECK-NEXT: %storemerge1822.lcssa = phi i32 [ %storemerge1822.lcssa.ph, %if.end.loopexit ], [ %storemerge1822.lcssa.ph32, %if.end.loopexit31 ] |
| ; CHECK-NEXT: --> %storemerge1822.lcssa U: [0,4) S: [0,4) |
| ; CHECK-NEXT: %i1 = load i32, i32* @e, align 4 |
| ; CHECK-NEXT: --> %i1 U: full-set S: full-set |
| ; CHECK-NEXT: %i2 = load volatile i32, i32* @b, align 4 |
| ; CHECK-NEXT: --> %i2 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond6: Variant, %outer.loop: Variant } |
| ; CHECK-NEXT: %dec = add nsw i32 %storemerge1921, -1 |
| ; CHECK-NEXT: --> {2,+,-1}<nsw><%for.cond6> U: [2,3) S: [2,3) Exits: <<Unknown>> LoopDispositions: { %for.cond6: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %inc.lcssa.lcssa = phi i32 [ 4, %for.inc13.3 ] |
| ; CHECK-NEXT: --> 4 U: [4,5) S: [4,5) |
| ; CHECK-NEXT: %retval.0 = phi i32 [ %i1, %if.end ], [ 0, %cleanup.loopexit ] |
| ; CHECK-NEXT: --> %retval.0 U: full-set S: full-set |
| ; CHECK-NEXT: %storemerge1921.3 = phi i32 [ 3, %for.end ], [ %dec.3, %for.end.3 ] |
| ; CHECK-NEXT: --> {3,+,-1}<nuw><nsw><%inner.loop> U: [3,4) S: [3,4) Exits: <<Unknown>> LoopDispositions: { %inner.loop: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %idxprom20.3 = zext i32 %storemerge1921.3 to i64 |
| ; CHECK-NEXT: --> {3,+,4294967295}<nuw><nsw><%inner.loop> U: [3,4) S: [3,4) Exits: <<Unknown>> LoopDispositions: { %inner.loop: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %arrayidx7.3 = getelementptr inbounds [1 x [4 x i16]], [1 x [4 x i16]]* @__const.f.g, i64 0, i64 0, i64 %idxprom20.3 |
| ; CHECK-NEXT: --> {(6 + @__const.f.g)<nuw>,+,8589934590}<nuw><%inner.loop> U: [6,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %inner.loop: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %i7 = load i16, i16* %arrayidx7.3, align 2 |
| ; CHECK-NEXT: --> %i7 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %inner.loop: Variant, %outer.loop: Variant } |
| ; CHECK-NEXT: %i8 = load volatile i32, i32* @b, align 4 |
| ; CHECK-NEXT: --> %i8 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %inner.loop: Variant, %outer.loop: Variant } |
| ; CHECK-NEXT: %dec.3 = add nsw i32 %storemerge1921.3, -1 |
| ; CHECK-NEXT: --> {2,+,-1}<nsw><%inner.loop> U: [2,3) S: [2,3) Exits: <<Unknown>> LoopDispositions: { %inner.loop: Computable, %outer.loop: Variant } |
| ; CHECK-NEXT: %storemerge1921.lcssa25.3 = phi i32 [ %storemerge1921.3, %for.end.3 ] |
| ; CHECK-NEXT: --> %storemerge1921.lcssa25.3 U: [3,4) S: [3,4) Exits: <<Unknown>> LoopDispositions: { %outer.loop: Variant, %for.cond6: Invariant, %inner.loop: Invariant } |
| ; CHECK-NEXT: %dec16 = add nsw i32 %storemerge23, -1 |
| ; CHECK-NEXT: --> {2,+,-1}<nsw><%outer.loop> U: [0,3) S: [0,3) Exits: <<Unknown>> LoopDispositions: { %outer.loop: Computable, %for.cond6: Invariant, %inner.loop: Invariant } |
| ; CHECK-NEXT: Determining loop execution counts for: @f |
| ; CHECK-NEXT: Loop %for.cond6: <multiple exits> Unpredictable backedge-taken count. |
| ; CHECK-NEXT: exit count for for.cond6: 0 |
| ; CHECK-NEXT: exit count for for.end: ***COULDNOTCOMPUTE*** |
| ; CHECK-NEXT: Loop %for.cond6: max backedge-taken count is 0 |
| ; CHECK-NEXT: Loop %for.cond6: Unpredictable predicated backedge-taken count. |
| ; CHECK-NEXT: Loop %inner.loop: <multiple exits> Unpredictable backedge-taken count. |
| ; CHECK-NEXT: exit count for inner.loop: 0 |
| ; CHECK-NEXT: exit count for for.end.3: ***COULDNOTCOMPUTE*** |
| ; CHECK-NEXT: Loop %inner.loop: max backedge-taken count is 0 |
| ; CHECK-NEXT: Loop %inner.loop: Unpredictable predicated backedge-taken count. |
| ; CHECK-NEXT: Loop %outer.loop: <multiple exits> Unpredictable backedge-taken count. |
| ; CHECK-NEXT: exit count for for.cond6: ***COULDNOTCOMPUTE*** |
| ; CHECK-NEXT: exit count for inner.loop: ***COULDNOTCOMPUTE*** |
| ; CHECK-NEXT: exit count for for.inc13.3: 2 |
| ; CHECK-NEXT: Loop %outer.loop: max backedge-taken count is 2 |
| ; CHECK-NEXT: Loop %outer.loop: Unpredictable predicated backedge-taken count. |
| ; |
| entry: |
| store i32 3, i32* @a, align 4 |
| br label %outer.loop |
| |
| outer.loop: ; preds = %for.inc13.3, %entry |
| %storemerge23 = phi i32 [ 3, %entry ], [ %dec16, %for.inc13.3 ] |
| br label %for.cond6 |
| |
| for.cond6: ; preds = %for.end, %outer.loop |
| %storemerge1921 = phi i32 [ 3, %outer.loop ], [ %dec, %for.end ] |
| %idxprom20 = zext i32 %storemerge1921 to i64 |
| %arrayidx7 = getelementptr inbounds [1 x [4 x i16]], [1 x [4 x i16]]* @__const.f.g, i64 0, i64 0, i64 %idxprom20 |
| %i = load i16, i16* %arrayidx7, align 2 |
| %tobool8 = icmp eq i16 %i, 0 |
| br i1 %tobool8, label %if.end.loopexit, label %for.end |
| |
| if.end.loopexit: ; preds = %for.cond6 |
| %storemerge1822.lcssa.ph = phi i32 [ 0, %for.cond6 ] |
| br label %if.end |
| |
| if.end.loopexit31: ; preds = %inner.loop |
| %storemerge1822.lcssa.ph32 = phi i32 [ 3, %inner.loop ] |
| br label %if.end |
| |
| if.end: ; preds = %if.end.loopexit31, %if.end.loopexit |
| %storemerge1822.lcssa = phi i32 [ %storemerge1822.lcssa.ph, %if.end.loopexit ], [ %storemerge1822.lcssa.ph32, %if.end.loopexit31 ] |
| store i32 %storemerge1822.lcssa, i32* @c, align 4 |
| store i32 2, i32* @d, align 4 |
| %i1 = load i32, i32* @e, align 4 |
| br label %cleanup |
| |
| for.end: ; preds = %for.cond6 |
| %i2 = load volatile i32, i32* @b, align 4 |
| %tobool9 = icmp eq i32 %i2, 0 |
| %dec = add nsw i32 %storemerge1921, -1 |
| br i1 %tobool9, label %for.cond6, label %inner.loop |
| |
| cleanup.loopexit: ; preds = %for.inc13.3 |
| %inc.lcssa.lcssa = phi i32 [ 4, %for.inc13.3 ] |
| store i32 %inc.lcssa.lcssa, i32* @c, align 4 |
| br label %cleanup |
| |
| cleanup: ; preds = %cleanup.loopexit, %if.end |
| %retval.0 = phi i32 [ %i1, %if.end ], [ 0, %cleanup.loopexit ] |
| ret i32 %retval.0 |
| |
| inner.loop: ; preds = %for.end.3, %for.end |
| %storemerge1921.3 = phi i32 [ 3, %for.end ], [ %dec.3, %for.end.3 ] |
| %idxprom20.3 = zext i32 %storemerge1921.3 to i64 |
| %arrayidx7.3 = getelementptr inbounds [1 x [4 x i16]], [1 x [4 x i16]]* @__const.f.g, i64 0, i64 0, i64 %idxprom20.3 |
| %i7 = load i16, i16* %arrayidx7.3, align 2 |
| %tobool8.3 = icmp eq i16 %i7, 0 |
| br i1 %tobool8.3, label %if.end.loopexit31, label %for.end.3 |
| |
| for.end.3: ; preds = %inner.loop |
| %i8 = load volatile i32, i32* @b, align 4 |
| %tobool9.3 = icmp eq i32 %i8, 0 |
| %dec.3 = add nsw i32 %storemerge1921.3, -1 |
| br i1 %tobool9.3, label %inner.loop, label %for.inc13.3 |
| |
| for.inc13.3: ; preds = %for.end.3 |
| %storemerge1921.lcssa25.3 = phi i32 [ %storemerge1921.3, %for.end.3 ] |
| store i32 %storemerge1921.lcssa25.3, i32* @d, align 4 |
| %dec16 = add nsw i32 %storemerge23, -1 |
| store i32 %dec16, i32* @a, align 4 |
| %tobool = icmp eq i32 %dec16, 0 |
| br i1 %tobool, label %cleanup.loopexit, label %outer.loop |
| } |