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; RUN: opt -verify-loop-info -irce -S < %s | FileCheck %s
; RUN: opt -verify-loop-info -passes='require<branch-prob>,irce' -S < %s | FileCheck %s
define void @multiple_access_no_preloop(
i32* %arr_a, i32* %a_len_ptr, i32* %arr_b, i32* %b_len_ptr, i32 %n) {
entry:
%len.a = load i32, i32* %a_len_ptr, !range !0
%len.b = load i32, i32* %b_len_ptr, !range !0
%first.itr.check = icmp sgt i32 %n, 0
br i1 %first.itr.check, label %loop, label %exit
loop:
%idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds.b ]
%idx.next = add i32 %idx, 1
%abc.a = icmp slt i32 %idx, %len.a
br i1 %abc.a, label %in.bounds.a, label %out.of.bounds, !prof !1
in.bounds.a:
%addr.a = getelementptr i32, i32* %arr_a, i32 %idx
store i32 0, i32* %addr.a
%abc.b = icmp slt i32 %idx, %len.b
br i1 %abc.b, label %in.bounds.b, label %out.of.bounds, !prof !1
in.bounds.b:
%addr.b = getelementptr i32, i32* %arr_b, i32 %idx
store i32 -1, i32* %addr.b
%next = icmp slt i32 %idx.next, %n
br i1 %next, label %loop, label %exit
out.of.bounds:
ret void
exit:
ret void
}
; CHECK-LABEL: @multiple_access_no_preloop(
; CHECK: loop.preheader:
; CHECK: [[smax_len:[^ ]+]] = call i32 @llvm.smin.i32(i32 %len.b, i32 %len.a)
; CHECK: [[upper_limit_loclamp:[^ ]+]] = call i32 @llvm.smin.i32(i32 [[smax_len]], i32 %n)
; CHECK: [[upper_limit:[^ ]+]] = call i32 @llvm.smax.i32(i32 [[upper_limit_loclamp]], i32 0)
; CHECK: loop:
; CHECK: br i1 true, label %in.bounds.a, label %out.of.bounds
; CHECK: in.bounds.a:
; CHECK: br i1 true, label %in.bounds.b, label %out.of.bounds
; CHECK: in.bounds.b:
; CHECK: [[main_loop_cond:[^ ]+]] = icmp slt i32 %idx.next, [[upper_limit]]
; CHECK: br i1 [[main_loop_cond]], label %loop, label %main.exit.selector
; CHECK: in.bounds.b.postloop:
; CHECK: %next.postloop = icmp slt i32 %idx.next.postloop, %n
; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit
!0 = !{i32 0, i32 2147483647}
!1 = !{!"branch_weights", i32 128, i32 4}
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