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; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
; RUN: opt -passes='print<scalar-evolution>' -disable-output %s 2>&1 | FileCheck %s
; Tests for PR47904.
define void @test_trip_multiple_4(i32 %num) {
; CHECK-LABEL: @test_trip_multiple_4
; CHECK: Loop %for.body: backedge-taken count is (-1 + %num)
; CHECK-NEXT: Loop %for.body: max backedge-taken count is -2
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (-1 + %num)
; CHECK: Loop %for.body: Trip multiple is 4
;
entry:
%u = urem i32 %num, 4
%cmp = icmp eq i32 %u, 0
tail call void @llvm.assume(i1 %cmp)
%cmp.1 = icmp uge i32 %num, 4
tail call void @llvm.assume(i1 %cmp.1)
br label %for.body
for.body:
%i.010 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%inc = add nuw nsw i32 %i.010, 1
%cmp2 = icmp ult i32 %inc, %num
br i1 %cmp2, label %for.body, label %exit
exit:
ret void
}
; Same as @test_trip_multiple_4 but with the icmp operands swapped.
define void @test_trip_multiple_4_icmp_ops_swapped(i32 %num) {
; CHECK-LABEL: @test_trip_multiple_4_icmp_ops_swapped
; CHECK: Loop %for.body: backedge-taken count is (-1 + %num)
; CHECK-NEXT: Loop %for.body: max backedge-taken count is -2
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (-1 + %num)
; CHECK: Loop %for.body: Trip multiple is 4
;
entry:
%u = urem i32 %num, 4
%cmp = icmp eq i32 0, %u
tail call void @llvm.assume(i1 %cmp)
%cmp.1 = icmp uge i32 %num, 4
tail call void @llvm.assume(i1 %cmp.1)
br label %for.body
for.body:
%i.010 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%inc = add nuw nsw i32 %i.010, 1
%cmp2 = icmp ult i32 %inc, %num
br i1 %cmp2, label %for.body, label %exit
exit:
ret void
}
define void @test_trip_multiple_5(i32 %num) {
; CHECK-LABEL: @test_trip_multiple_5
; CHECK: Loop %for.body: backedge-taken count is (-1 + %num)
; CHECK-NEXT: Loop %for.body: max backedge-taken count is -2
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (-1 + %num)
; CHECK: Loop %for.body: Trip multiple is 1
;
entry:
%u = urem i32 %num, 5
%cmp = icmp eq i32 %u, 0
tail call void @llvm.assume(i1 %cmp)
%cmp.1 = icmp uge i32 %num, 5
tail call void @llvm.assume(i1 %cmp.1)
br label %for.body
for.body:
%i.010 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%inc = add nuw nsw i32 %i.010, 1
%cmp2 = icmp ult i32 %inc, %num
br i1 %cmp2, label %for.body, label %exit
exit:
ret void
}
define void @test_trunc_operand_larger_than_urem_expr(i64 %N) {
; CHECK-LABEL: @test_trunc_operand_larger_than_urem_expr
; CHECK: Loop %for.body: backedge-taken count is (-1 + %N)
; CHECK-NEXT: Loop %for.body: max backedge-taken count is -1
; CHECK-NEXT: Loop %for.body: Predicated backedge-taken count is (-1 + %N)
;
entry:
%conv = trunc i64 %N to i32
%and = and i32 %conv, 1
%cmp.pre = icmp eq i32 %and, 0
br i1 %cmp.pre, label %for.body, label %exit
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%iv.next = add nuw nsw i64 %iv, 1
%cmp.1 = icmp ne i64 %iv.next, %N
br i1 %cmp.1, label %for.body, label %exit
exit:
ret void
}
declare void @llvm.assume(i1)
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