derek.holloway
7502bf64a4
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137 lines
7.9 KiB
LLVM
137 lines
7.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
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define dso_local void @simple(i32 noundef %n) local_unnamed_addr {
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; CHECK-LABEL: 'simple'
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; CHECK-NEXT: Classifying expressions for: @simple
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; CHECK-NEXT: %right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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; CHECK-NEXT: --> {%n,+,-4}<nsw><%while.body> U: full-set S: full-set Exits: ((-4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nsw> + %n) LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %left.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
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; CHECK-NEXT: --> {0,+,4}<nuw><nsw><%while.body> U: [0,2147483641) S: [0,2147483641) Exits: (4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nuw> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %inc = add nuw nsw i32 %left.05, 4
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; CHECK-NEXT: --> {4,+,4}<nuw><nsw><%while.body> U: [4,2147483645) S: [4,2147483645) Exits: (4 + (4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nuw>)<nuw> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %dec = add nsw i32 %right.06, -4
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; CHECK-NEXT: --> {(-4 + %n),+,-4}<nsw><%while.body> U: full-set S: full-set Exits: (-4 + (-4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nsw> + %n) LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @simple
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; CHECK-NEXT: Loop %while.body: backedge-taken count is (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))
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; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 536870910
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; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))
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; CHECK-NEXT: Loop %while.body: Trip multiple is 1
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;
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entry:
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%cmp4 = icmp sgt i32 %n, 0
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br i1 %cmp4, label %while.body, label %while.end
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while.body:
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%right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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%left.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
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%inc = add nuw nsw i32 %left.05, 4
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%dec = add nsw i32 %right.06, -4
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%cmp = icmp slt i32 %inc, %dec
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br i1 %cmp, label %while.body, label %while.end
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while.end:
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ret void
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}
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; Cannot find backedge-count because subtraction of strides is wrapping.
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define dso_local void @stride_overflow(i32 noundef %n) local_unnamed_addr {
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; CHECK-LABEL: 'stride_overflow'
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; CHECK-NEXT: Classifying expressions for: @stride_overflow
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; CHECK-NEXT: %right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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; CHECK-NEXT: --> {%n,+,-1}<nsw><%while.body> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %left.05 = phi i32 [ %inc, %while.body ], [ 2147483647, %entry ]
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; CHECK-NEXT: --> {2147483647,+,2147483647}<nuw><nsw><%while.body> U: [2147483647,-2147483648) S: [2147483647,-2147483648) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %inc = add nuw nsw i32 %left.05, 2147483647
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; CHECK-NEXT: --> {-2,+,2147483647}<nuw><nsw><%while.body> U: [-2,-1) S: [-2,0) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %dec = add nsw i32 %right.06, -1
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; CHECK-NEXT: --> {(-1 + %n),+,-1}<nsw><%while.body> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @stride_overflow
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; CHECK-NEXT: Loop %while.body: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 1
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; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is i32 1
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;
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entry:
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%cmp4 = icmp sgt i32 %n, 0
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br i1 %cmp4, label %while.body, label %while.end
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while.body:
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%right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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%left.05 = phi i32 [ %inc, %while.body ], [ 2147483647, %entry ]
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%inc = add nuw nsw i32 %left.05, 2147483647
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%dec = add nsw i32 %right.06, -1
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%cmp = icmp slt i32 %inc, %dec
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br i1 %cmp, label %while.body, label %while.end
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while.end:
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ret void
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}
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; Cannot find backedge-count because %conv110 is wrapping
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define dso_local void @rhs_wrapping() local_unnamed_addr {
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; CHECK-LABEL: 'rhs_wrapping'
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; CHECK-NEXT: Classifying expressions for: @rhs_wrapping
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; CHECK-NEXT: %a = alloca i8, align 1
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; CHECK-NEXT: --> %a U: full-set S: full-set
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; CHECK-NEXT: %conv110 = phi i32 [ 0, %entry ], [ %sext8, %while.body ]
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; CHECK-NEXT: --> {0,+,-1090519040}<%while.body> U: [0,-16777215) S: [-2147483648,2130706433) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %conv9 = phi i32 [ -2147483648, %entry ], [ %sext, %while.body ]
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; CHECK-NEXT: --> {-2147483648,+,16777216}<nsw><%while.body> U: [0,-16777215) S: [-2147483648,2113929217) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %sext = add nsw i32 %conv9, 16777216
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; CHECK-NEXT: --> {-2130706432,+,16777216}<nsw><%while.body> U: [0,-16777215) S: [-2130706432,2130706433) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %sext8 = add i32 %conv110, -1090519040
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; CHECK-NEXT: --> {-1090519040,+,-1090519040}<%while.body> U: [0,-16777215) S: [-2147483648,2130706433) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @rhs_wrapping
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; CHECK-NEXT: Loop %while.body: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 254
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; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is i32 254
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;
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entry:
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%a = alloca i8, align 1
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br label %while.body
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while.body:
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%conv110 = phi i32 [ 0, %entry ], [ %sext8, %while.body ]
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%conv9 = phi i32 [ -2147483648, %entry ], [ %sext, %while.body ]
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%sext = add nsw i32 %conv9, 16777216
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%sext8 = add i32 %conv110, -1090519040
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%cmp = icmp slt i32 %sext, %sext8
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br i1 %cmp, label %while.body, label %while.end
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while.end:
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ret void
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}
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; abs(left_stride) != abs(right_stride)
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define dso_local void @simple2() local_unnamed_addr {
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; CHECK-LABEL: 'simple2'
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; CHECK-NEXT: Classifying expressions for: @simple2
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; CHECK-NEXT: %right.08 = phi i32 [ 50, %entry ], [ %add2, %while.body ]
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; CHECK-NEXT: --> {50,+,-5}<nsw><%while.body> U: [25,51) S: [25,51) Exits: 25 LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %left.07 = phi i32 [ 0, %entry ], [ %add, %while.body ]
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; CHECK-NEXT: --> {0,+,4}<nuw><nsw><%while.body> U: [0,21) S: [0,21) Exits: 20 LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %add = add nuw nsw i32 %left.07, 4
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; CHECK-NEXT: --> {4,+,4}<nuw><nsw><%while.body> U: [4,25) S: [4,25) Exits: 24 LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: %add2 = add nsw i32 %right.08, -5
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; CHECK-NEXT: --> {45,+,-5}<nsw><%while.body> U: [20,46) S: [20,46) Exits: 20 LoopDispositions: { %while.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @simple2
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; CHECK-NEXT: Loop %while.body: backedge-taken count is i32 5
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; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 5
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; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is i32 5
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; CHECK-NEXT: Loop %while.body: Trip multiple is 6
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;
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entry:
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br label %while.body
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while.body:
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%right.08 = phi i32 [ 50, %entry ], [ %add2, %while.body ]
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%left.07 = phi i32 [ 0, %entry ], [ %add, %while.body ]
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%add = add nuw nsw i32 %left.07, 4
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%add2 = add nsw i32 %right.08, -5
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%cmp = icmp slt i32 %add, %add2
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br i1 %cmp, label %while.body, label %while.end
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while.end:
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ret void
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}
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