derek.holloway
7502bf64a4
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134 lines
6.9 KiB
LLVM
134 lines
6.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes='print<scalar-evolution>' -scalar-evolution-classify-expressions=0 -disable-output %s 2>&1 | FileCheck %s
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define i32 @ptr_induction_ult(ptr %a, ptr %b) {
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; CHECK-LABEL: 'ptr_induction_ult'
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; CHECK-NEXT: Determining loop execution counts for: @ptr_induction_ult
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; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (((-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) /u 4)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i2 ((trunc i64 (ptrtoint ptr %b to i64) to i2) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i2))) to i64) == 0
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; CHECK-NEXT: Loop %loop: Predicated constant max backedge-taken count is i64 4611686018427387903
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i2 ((trunc i64 (ptrtoint ptr %b to i64) to i2) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i2))) to i64) == 0
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; CHECK-NEXT: Loop %loop: Predicated symbolic max backedge-taken count is (((-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) /u 4)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i2 ((trunc i64 (ptrtoint ptr %b to i64) to i2) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i2))) to i64) == 0
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;
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entry:
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%cmp.6 = icmp ult ptr %a, %b
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br i1 %cmp.6, label %loop, label %exit
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loop:
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%ptr.iv = phi ptr [ %ptr.iv.next, %loop ], [ %a, %entry ]
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%ptr.iv.next = getelementptr i32, ptr %ptr.iv, i64 1
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%exitcond = icmp eq ptr %ptr.iv, %b
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret i32 0
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}
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define i32 @ptr_induction_ult_3_step_6(ptr %a, ptr %b) {
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; CHECK-LABEL: 'ptr_induction_ult_3_step_6'
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; CHECK-NEXT: Determining loop execution counts for: @ptr_induction_ult_3_step_6
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; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (((3074457345618258603 * (ptrtoint ptr %b to i64)) + (-3074457345618258603 * (ptrtoint ptr %a to i64))) /u 2)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i1 (trunc i64 ((-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) to i1) to i64) == 0
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; CHECK-NEXT: Loop %loop: Predicated constant max backedge-taken count is i64 9223372036854775807
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i1 (trunc i64 ((-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) to i1) to i64) == 0
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; CHECK-NEXT: Loop %loop: Predicated symbolic max backedge-taken count is (((3074457345618258603 * (ptrtoint ptr %b to i64)) + (-3074457345618258603 * (ptrtoint ptr %a to i64))) /u 2)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i1 (trunc i64 ((-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) to i1) to i64) == 0
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;
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entry:
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%cmp.6 = icmp ult ptr %a, %b
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br i1 %cmp.6, label %loop, label %exit
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loop:
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%ptr.iv = phi ptr [ %ptr.iv.next, %loop ], [ %a, %entry ]
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%ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 6
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%exitcond = icmp eq ptr %ptr.iv, %b
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret i32 0
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}
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define i32 @ptr_induction_ult_3_step_7(ptr %a, ptr %b) {
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; CHECK-LABEL: 'ptr_induction_ult_3_step_7'
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; CHECK-NEXT: Determining loop execution counts for: @ptr_induction_ult_3_step_7
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; CHECK-NEXT: Loop %loop: backedge-taken count is ((7905747460161236407 * (ptrtoint ptr %b to i64)) + (-7905747460161236407 * (ptrtoint ptr %a 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 ((7905747460161236407 * (ptrtoint ptr %b to i64)) + (-7905747460161236407 * (ptrtoint ptr %a to i64)))
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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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%cmp.6 = icmp ult ptr %a, %b
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br i1 %cmp.6, label %loop, label %exit
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loop:
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%ptr.iv = phi ptr [ %ptr.iv.next, %loop ], [ %a, %entry ]
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%ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 7
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%exitcond = icmp eq ptr %ptr.iv, %b
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret i32 0
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}
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; %a and %b may not have the same alignment, so the loop may only via the early
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; exit when %ptr.iv > %b. The predicated exit count for the latch can be
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; computed by adding a predicate.
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define void @ptr_induction_early_exit_eq_1(ptr %a, ptr %b, ptr %c) {
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; CHECK-LABEL: 'ptr_induction_early_exit_eq_1'
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; CHECK-NEXT: Determining loop execution counts for: @ptr_induction_early_exit_eq_1
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for loop.inc: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: predicated exit count for loop.inc: ((-8 + (-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) /u 8)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i3 ((trunc i64 (ptrtoint ptr %b to i64) to i3) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i3))) to i64) == 0
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; CHECK-EMPTY:
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; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for loop.inc: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: predicated symbolic max exit count for loop.inc: ((-8 + (-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) /u 8)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i3 ((trunc i64 (ptrtoint ptr %b to i64) to i3) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i3))) to i64) == 0
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; CHECK-EMPTY:
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; CHECK-NEXT: Loop %loop: Predicated constant max backedge-taken count is i64 2305843009213693951
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i3 ((trunc i64 (ptrtoint ptr %b to i64) to i3) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i3))) to i64) == 0
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; CHECK-NEXT: Loop %loop: Predicated symbolic max backedge-taken count is ((-8 + (-1 * (ptrtoint ptr %a to i64)) + (ptrtoint ptr %b to i64)) /u 8)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i3 ((trunc i64 (ptrtoint ptr %b to i64) to i3) + (-1 * (trunc i64 (ptrtoint ptr %a to i64) to i3))) to i64) == 0
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;
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entry:
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%cmp = icmp eq ptr %a, %b
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br i1 %cmp, label %exit, label %loop
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loop:
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%ptr.iv = phi ptr [ %ptr.iv.next, %loop.inc ], [ %a, %entry ]
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%ld1 = load ptr, ptr %ptr.iv, align 8
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%earlyexitcond = icmp eq ptr %ld1, %c
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br i1 %earlyexitcond, label %exit, label %loop.inc
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loop.inc:
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%ptr.iv.next = getelementptr inbounds i8, ptr %ptr.iv, i64 8
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%exitcond = icmp eq ptr %ptr.iv.next, %b
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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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