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Differential D145510 Diff 505003 llvm/test/Analysis/ScalarEvolution/finite-trip-count.ll

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llvm/test/Analysis/ScalarEvolution/finite-trip-count.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu" target triple = "x86_64-unknown-linux-gnu"
declare void @non_exit_use(i32 %i) #0 declare void @non_exit_use(i32 %i) #0
define void @SLE(i32 %len) willreturn { define void @SLE(i32 %len) willreturn {
; CHECK-LABEL: 'SLE' ; CHECK-LABEL: 'SLE'
; CHECK-NEXT: Determining loop execution counts for: @SLE ; CHECK-NEXT: Determining loop execution counts for: @SLE
; CHECK-NEXT: Loop %for.body: backedge-taken count is (0 smax (1 + %len)<nsw>) ; CHECK-NEXT: Loop %for.body: backedge-taken count is (0 smax (1 + %len))
; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is 2147483647 ; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is 2147483647
; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (0 smax (1 + %len)<nsw>) ; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (0 smax (1 + %len))
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (0 smax (1 + %len)<nsw>) ; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (0 smax (1 + %len))
; CHECK-NEXT: Predicates: ; CHECK-NEXT: Predicates:
; CHECK: Loop %for.body: Trip multiple is 1 ; CHECK: Loop %for.body: Trip multiple is 1
; ;
entry: entry:
br label %for.body br label %for.body
for.body: for.body:
%iv = phi i32 [ %inc, %for.body ], [ 0, %entry ] %iv = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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for.end: for.end:
ret void ret void
} }
define void @ULE(i32 %len) willreturn { define void @ULE(i32 %len) willreturn {
; CHECK-LABEL: 'ULE' ; CHECK-LABEL: 'ULE'
; CHECK-NEXT: Determining loop execution counts for: @ULE ; CHECK-NEXT: Determining loop execution counts for: @ULE
; CHECK-NEXT: Loop %for.body: backedge-taken count is (1 + %len)<nuw> ; CHECK-NEXT: Loop %for.body: backedge-taken count is (1 + %len)
; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is -1 ; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is -1
; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (1 + %len)<nuw> ; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (1 + %len)
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (1 + %len)<nuw> ; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (1 + %len)
; CHECK-NEXT: Predicates: ; CHECK-NEXT: Predicates:
; CHECK: Loop %for.body: Trip multiple is 1 ; CHECK: Loop %for.body: Trip multiple is 1
; ;
entry: entry:
br label %for.body br label %for.body
for.body: for.body:
%iv = phi i32 [ %inc, %for.body ], [ 0, %entry ] %iv = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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for.end: for.end:
ret void ret void
} }
define void @SGE(i32 %end) willreturn { define void @SGE(i32 %end) willreturn {
; CHECK-LABEL: 'SGE' ; CHECK-LABEL: 'SGE'
; CHECK-NEXT: Determining loop execution counts for: @SGE ; CHECK-NEXT: Determining loop execution counts for: @SGE
; CHECK-NEXT: Loop %for.body: backedge-taken count is (100 + (-1 * (100 smin (-1 + %end)<nsw>))) ; CHECK-NEXT: Loop %for.body: backedge-taken count is (100 + (-1 * (100 smin (-1 + %end))))
; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is -2147483548 ; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is -2147483548
; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (100 + (-1 * (100 smin (-1 + %end)<nsw>))) ; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (100 + (-1 * (100 smin (-1 + %end))))
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (100 + (-1 * (100 smin (-1 + %end)<nsw>))) ; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (100 + (-1 * (100 smin (-1 + %end))))
; CHECK-NEXT: Predicates: ; CHECK-NEXT: Predicates:
; CHECK: Loop %for.body: Trip multiple is 1 ; CHECK: Loop %for.body: Trip multiple is 1
; ;
entry: entry:
br label %for.body br label %for.body
for.body: for.body:
%iv = phi i32 [ %inc, %for.body ], [ 100, %entry ] %iv = phi i32 [ %inc, %for.body ], [ 100, %entry ]
▲ Show 20 Lines • Show All 69 Lines • ▼ Show 20 Linesfor.body:
%inc = add i32 %iv, -1 %inc = add i32 %iv, -1
%cmp = icmp uge i32 %iv, %end %cmp = icmp uge i32 %iv, %end
br i1 %cmp, label %for.body, label %for.end br i1 %cmp, label %for.body, label %for.end
for.end: for.end:
ret void ret void
} }
; FIXME: It would be better to compute ((-2 + %n) /u 2) as trip count here.
define void @pr54191(i64 %n) mustprogress { define void @pr54191(i64 %n) mustprogress {
; CHECK-LABEL: 'pr54191' ; CHECK-LABEL: 'pr54191'
; CHECK-NEXT: Determining loop execution counts for: @pr54191 ; CHECK-NEXT: Determining loop execution counts for: @pr54191
; CHECK-NEXT: Loop %loop: backedge-taken count is ((-3 + (4 smax (1 + %n)<nsw>))<nsw> /u 2) ; CHECK-NEXT: Loop %loop: backedge-taken count is ((-2 + %n) /u 2)
; CHECK-NEXT: Loop %loop: constant max backedge-taken count is 4611686018427387901 ; CHECK-NEXT: Loop %loop: constant max backedge-taken count is 4611686018427387902
; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((-3 + (4 smax (1 + %n)<nsw>))<nsw> /u 2) ; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((-2 + %n) /u 2)
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is ((-3 + (4 smax (1 + %n)<nsw>))<nsw> /u 2) ; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is ((-2 + %n) /u 2)
; CHECK-NEXT: Predicates: ; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1 ; CHECK: Loop %loop: Trip multiple is 1
; ;
entry: entry:
%guard = icmp sgt i64 %n, 1 %guard = icmp sgt i64 %n, 1
br i1 %guard, label %loop, label %exit br i1 %guard, label %loop, label %exit
loop: loop:
%iv = phi i64 [ 2, %entry ], [ %iv.next, %loop ] %iv = phi i64 [ 2, %entry ], [ %iv.next, %loop ]
%iv.next = add nuw nsw i64 %iv, 2 %iv.next = add nuw nsw i64 %iv, 2
%cmp = icmp sle i64 %iv.next, %n %cmp = icmp sle i64 %iv.next, %n
br i1 %cmp, label %loop, label %exit br i1 %cmp, label %loop, label %exit
exit: exit:
ret void ret void
} }