derek.holloway
7502bf64a4
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160 lines
7.2 KiB
LLVM
160 lines
7.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes='print<scalar-evolution>' -disable-output %s 2>&1 | FileCheck %s
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define void @loop_guard_improves_exact_backedge_taken_count_1(i32 %conv) {
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; CHECK-LABEL: 'loop_guard_improves_exact_backedge_taken_count_1'
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; CHECK-NEXT: Classifying expressions for: @loop_guard_improves_exact_backedge_taken_count_1
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; CHECK-NEXT: %and = and i32 %conv, 1
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; CHECK-NEXT: --> (zext i1 (trunc i32 %conv to i1) to i32) U: [0,2) S: [0,2)
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; CHECK-NEXT: %conv8 = zext i32 %and to i64
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; CHECK-NEXT: --> (zext i1 (trunc i32 %conv to i1) to i64) U: [0,2) S: [0,2)
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; CHECK-NEXT: %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,1) S: [0,1) Exits: 0 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.next = add i64 %iv, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,2) S: [1,2) Exits: 1 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @loop_guard_improves_exact_backedge_taken_count_1
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; CHECK-NEXT: Loop %loop: backedge-taken count is i64 0
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i64 0
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is i64 0
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; CHECK-NEXT: Loop %loop: Trip multiple is 1
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;
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entry:
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%and = and i32 %conv, 1
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%conv8 = zext i32 %and to i64
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%c = icmp ugt i32 %and, 0
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br i1 %c, label %exit, label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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call void @clobber()
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%iv.next = add i64 %iv, 1
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%exitcond = icmp eq i64 %iv, %conv8
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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define void @loop_guard_improves_exact_backedge_taken_count_2(i32 %conv) {
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; CHECK-LABEL: 'loop_guard_improves_exact_backedge_taken_count_2'
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; CHECK-NEXT: Classifying expressions for: @loop_guard_improves_exact_backedge_taken_count_2
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; CHECK-NEXT: %and = and i32 %conv, 1
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; CHECK-NEXT: --> (zext i1 (trunc i32 %conv to i1) to i32) U: [0,2) S: [0,2)
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; CHECK-NEXT: %conv8 = zext i32 %and to i64
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; CHECK-NEXT: --> (zext i1 (trunc i32 %conv to i1) to i64) U: [0,2) S: [0,2)
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; CHECK-NEXT: %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,2) S: [0,2) Exits: (zext i1 (trunc i32 %conv to i1) to i64) LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.next = add i64 %iv, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,3) S: [1,3) Exits: (1 + (zext i1 (trunc i32 %conv to i1) to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @loop_guard_improves_exact_backedge_taken_count_2
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; CHECK-NEXT: Loop %loop: backedge-taken count is (zext i1 (trunc i32 %conv to i1) to i64)
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i64 1
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is (zext i1 (trunc i32 %conv to i1) to i64)
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; CHECK-NEXT: Loop %loop: Trip multiple is 2
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;
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entry:
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%and = and i32 %conv, 1
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%conv8 = zext i32 %and to i64
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%c = icmp eq i32 %and, 1
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br i1 %c, label %loop, label %exit
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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call void @clobber()
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%iv.next = add i64 %iv, 1
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%exitcond = icmp eq i64 %iv, %conv8
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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declare void @use(i32)
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define void @rewrite_preserve_add_nsw(i32 %a) {
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; CHECK-LABEL: 'rewrite_preserve_add_nsw'
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; CHECK-NEXT: Classifying expressions for: @rewrite_preserve_add_nsw
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; CHECK-NEXT: %add = add nsw i32 %a, 4
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; CHECK-NEXT: --> (4 + %a)<nsw> U: [-2147483644,-2147483648) S: [-2147483644,-2147483648)
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; CHECK-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
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; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (4 + %a)<nsw> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.next = add i32 %iv, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,-2147483647) S: [1,-2147483647) Exits: (5 + %a) LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @rewrite_preserve_add_nsw
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; CHECK-NEXT: Loop %loop: backedge-taken count is (4 + %a)<nsw>
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 2147483647
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is (4 + %a)<nsw>
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; CHECK-NEXT: Loop %loop: Trip multiple is 1
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;
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entry:
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%add = add nsw i32 %a, 4
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call void @use(i32 noundef %add)
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%pre = icmp sgt i32 %a, -4
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br i1 %pre, label %loop, label %exit
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
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call void @clobber()
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%iv.next = add i32 %iv, 1
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%ec = icmp slt i32 %iv, %add
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br i1 %ec, label %loop, label %exit
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exit:
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ret void
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}
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declare void @clobber()
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declare void @clobber.i32(i32)
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define void @test_guards_across_loops(i32 %N) {
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; CHECK-LABEL: 'test_guards_across_loops'
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; CHECK-NEXT: Classifying expressions for: @test_guards_across_loops
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; CHECK-NEXT: %iv.1 = phi i32 [ 0, %entry ], [ %iv.1.next, %loop.1 ]
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; CHECK-NEXT: --> {0,+,1}<%loop.1> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop.1: Computable }
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; CHECK-NEXT: %iv.1.next = add i32 %iv.1, 1
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; CHECK-NEXT: --> {1,+,1}<%loop.1> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop.1: Computable }
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; CHECK-NEXT: %iv.2 = phi i32 [ 0, %loop.1 ], [ %iv.2.next, %loop.2 ]
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; CHECK-NEXT: --> {0,+,1}<nuw><%loop.2> U: full-set S: full-set Exits: (1 + %N) LoopDispositions: { %loop.2: Computable }
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; CHECK-NEXT: %iv.2.next = add i32 %iv.2, 1
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; CHECK-NEXT: --> {1,+,1}<nw><%loop.2> U: full-set S: full-set Exits: (2 + %N) LoopDispositions: { %loop.2: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_guards_across_loops
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; CHECK-NEXT: Loop %loop.2: backedge-taken count is (1 + (zext i32 %N to i64))<nuw><nsw>
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; CHECK-NEXT: Loop %loop.2: constant max backedge-taken count is i64 4294967296
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; CHECK-NEXT: Loop %loop.2: symbolic max backedge-taken count is (1 + (zext i32 %N to i64))<nuw><nsw>
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; CHECK-NEXT: Loop %loop.2: Trip multiple is 1
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; CHECK-NEXT: Loop %loop.1: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %loop.1: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop.1: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %loop.1: Predicated backedge-taken count is (1 + (zext i32 %N to i64))<nuw><nsw>
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {0,+,1}<%loop.1> Added Flags: <nusw>
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; CHECK-NEXT: Loop %loop.1: Predicated constant max backedge-taken count is i64 4294967296
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {0,+,1}<%loop.1> Added Flags: <nusw>
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; CHECK-NEXT: Loop %loop.1: Predicated symbolic max backedge-taken count is (1 + (zext i32 %N to i64))<nuw><nsw>
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {0,+,1}<%loop.1> Added Flags: <nusw>
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;
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entry:
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br label %loop.1
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loop.1:
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%iv.1 = phi i32 [ 0, %entry ], [ %iv.1.next, %loop.1 ]
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call void @clobber.i32(i32 %iv.1)
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%ec.1 = icmp ugt i32 %iv.1, %N
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%iv.1.next = add i32 %iv.1, 1
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br i1 %ec.1, label %loop.2, label %loop.1
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loop.2:
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%iv.2 = phi i32 [ 0, %loop.1 ], [ %iv.2.next, %loop.2 ]
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call void @clobber.i32(i32 %iv.2)
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%ec.2 = icmp ugt i32 %iv.2, %N
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%iv.2.next = add i32 %iv.2, 1
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br i1 %ec.2, label %exit, label %loop.2
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exit:
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ret void
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}
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