derek.holloway
7502bf64a4
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143 lines
7.1 KiB
LLVM
143 lines
7.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
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; Tests loops with huge trip counts. Trip count of >=2^32 are huge. Huge trip counts have a trip multiple
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; of the greatest power of 2 less than 2^32.
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declare void @foo(...)
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define void @trip_count_4294967295() {
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; CHECK-LABEL: 'trip_count_4294967295'
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; CHECK-NEXT: Classifying expressions for: @trip_count_4294967295
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; CHECK-NEXT: %i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%for.body> U: [0,4294967295) S: [0,4294967295) Exits: 4294967294 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: %add = add nuw nsw i64 %i.02, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%for.body> U: [1,4294967296) S: [1,4294967296) Exits: 4294967295 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @trip_count_4294967295
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; CHECK-NEXT: Loop %for.body: backedge-taken count is i64 4294967294
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 4294967294
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is i64 4294967294
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; CHECK-NEXT: Loop %for.body: Trip multiple is 4294967295
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;
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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tail call void (...) @foo() #2
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%add = add nuw nsw i64 %i.02, 1
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%exitcond.not = icmp eq i64 %add, 4294967295
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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define void @trip_count_4294967296() {
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; CHECK-LABEL: 'trip_count_4294967296'
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; CHECK-NEXT: Classifying expressions for: @trip_count_4294967296
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; CHECK-NEXT: %i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%for.body> U: [0,4294967296) S: [0,4294967296) Exits: 4294967295 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: %add = add nuw nsw i64 %i.02, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%for.body> U: [1,4294967297) S: [1,4294967297) Exits: 4294967296 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @trip_count_4294967296
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; CHECK-NEXT: Loop %for.body: backedge-taken count is i64 4294967295
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 4294967295
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is i64 4294967295
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; CHECK-NEXT: Loop %for.body: Trip multiple is 2147483648
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;
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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tail call void (...) @foo() #2
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%add = add nuw nsw i64 %i.02, 1
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%exitcond.not = icmp eq i64 %add, 4294967296
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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define void @trip_count_8589935692() {
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; CHECK-LABEL: 'trip_count_8589935692'
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; CHECK-NEXT: Classifying expressions for: @trip_count_8589935692
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; CHECK-NEXT: %i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%for.body> U: [0,8589934592) S: [0,8589934592) Exits: 8589934591 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: %add = add nuw nsw i64 %i.02, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%for.body> U: [1,8589934593) S: [1,8589934593) Exits: 8589934592 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @trip_count_8589935692
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; CHECK-NEXT: Loop %for.body: backedge-taken count is i64 8589934591
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 8589934591
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is i64 8589934591
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; CHECK-NEXT: Loop %for.body: Trip multiple is 2147483648
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;
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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tail call void (...) @foo() #2
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%add = add nuw nsw i64 %i.02, 1
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%exitcond.not = icmp eq i64 %add, 8589934592
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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define void @trip_count_9223372036854775808() {
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; CHECK-LABEL: 'trip_count_9223372036854775808'
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; CHECK-NEXT: Classifying expressions for: @trip_count_9223372036854775808
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; CHECK-NEXT: %i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%for.body> U: [0,-9223372036854775808) S: [0,-9223372036854775808) Exits: 9223372036854775807 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: %add = add nuw nsw i64 %i.02, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><%for.body> U: [1,-9223372036854775807) S: [1,-9223372036854775807) Exits: -9223372036854775808 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @trip_count_9223372036854775808
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; CHECK-NEXT: Loop %for.body: backedge-taken count is i64 9223372036854775807
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 9223372036854775807
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is i64 9223372036854775807
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; CHECK-NEXT: Loop %for.body: Trip multiple is 2147483648
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;
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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tail call void (...) @foo() #2
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%add = add nuw nsw i64 %i.02, 1
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%exitcond.not = icmp eq i64 %add, 9223372036854775808
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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define void @trip_count_18446744073709551615() {
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; CHECK-LABEL: 'trip_count_18446744073709551615'
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; CHECK-NEXT: Classifying expressions for: @trip_count_18446744073709551615
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; CHECK-NEXT: %i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%for.body> U: [0,-9223372036854775808) S: [0,-9223372036854775808) Exits: -2 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: %add = add nuw nsw i64 %i.02, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><%for.body> U: [1,0) S: [1,0) Exits: -1 LoopDispositions: { %for.body: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @trip_count_18446744073709551615
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; CHECK-NEXT: Loop %for.body: backedge-taken count is i64 -2
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 -2
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is i64 -2
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; CHECK-NEXT: Loop %for.body: Trip multiple is 1
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;
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i64 [ 0, %entry ], [ %add, %for.body ]
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tail call void (...) @foo() #2
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%add = add nuw nsw i64 %i.02, 1
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%exitcond.not = icmp eq i64 %add, 18446744073709551615
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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