105 lines
3.5 KiB
LLVM
105 lines
3.5 KiB
LLVM
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; RUN: opt -S -verify-loop-info -irce < %s | FileCheck %s
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; RUN: opt -S -verify-loop-info -passes='require<branch-prob>,irce' < %s | FileCheck %s
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define void @f_0(i32 *%arr, i32 *%a_len_ptr, i32 %n, i1* %cond_buf) {
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; CHECK-LABEL: @f_0(
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; CHECK: loop.preheader:
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; CHECK: [[len_sub:[^ ]+]] = add nsw i32 %len, -4
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; CHECK: [[exit_main_loop_at_hiclamp_cmp:[^ ]+]] = icmp slt i32 %n, [[len_sub]]
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; CHECK: [[exit_main_loop_at_hiclamp:[^ ]+]] = select i1 [[exit_main_loop_at_hiclamp_cmp]], i32 %n, i32 [[len_sub]]
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; CHECK: [[exit_main_loop_at_loclamp_cmp:[^ ]+]] = icmp sgt i32 [[exit_main_loop_at_hiclamp]], 0
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; CHECK: [[exit_main_loop_at_loclamp:[^ ]+]] = select i1 [[exit_main_loop_at_loclamp_cmp]], i32 [[exit_main_loop_at_hiclamp]], i32 0
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; CHECK: [[enter_main_loop:[^ ]+]] = icmp slt i32 0, [[exit_main_loop_at_loclamp]]
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; CHECK: br i1 [[enter_main_loop]], label %[[loop_preheader2:[^ ,]+]], label %main.pseudo.exit
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; CHECK: [[loop_preheader2]]:
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; CHECK: br label %loop
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entry:
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%len = load i32, i32* %a_len_ptr, !range !0
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%first.itr.check = icmp sgt i32 %n, 0
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br i1 %first.itr.check, label %loop, label %exit
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loop:
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%idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]
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%idx.next = add i32 %idx, 1
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%idx.for.abc = add i32 %idx, 4
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%abc.actual = icmp slt i32 %idx.for.abc, %len
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%cond = load volatile i1, i1* %cond_buf
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%abc = and i1 %cond, %abc.actual
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br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1
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; CHECK: loop:
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; CHECK: %cond = load volatile i1, i1* %cond_buf
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; CHECK: %abc = and i1 %cond, true
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; CHECK: br i1 %abc, label %in.bounds, label %[[loop_exit:[^ ,]+]], !prof !1
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; CHECK: [[loop_exit]]:
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; CHECK: br label %out.of.bounds
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in.bounds:
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%addr = getelementptr i32, i32* %arr, i32 %idx.for.abc
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store i32 0, i32* %addr
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%next = icmp slt i32 %idx.next, %n
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br i1 %next, label %loop, label %exit
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out.of.bounds:
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ret void
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exit:
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ret void
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}
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define void @f_1(
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i32* %arr_a, i32* %a_len_ptr, i32* %arr_b, i32* %b_len_ptr, i32 %n) {
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; CHECK-LABEL: @f_1(
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; CHECK: loop.preheader:
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; CHECK: [[smax_len_cond:[^ ]+]] = icmp slt i32 %len.b, %len.a
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; CHECK: [[smax_len:[^ ]+]] = select i1 [[smax_len_cond]], i32 %len.b, i32 %len.a
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; CHECK: [[upper_limit_cond_loclamp:[^ ]+]] = icmp slt i32 [[smax_len]], %n
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; CHECK: [[upper_limit_loclamp:[^ ]+]] = select i1 [[upper_limit_cond_loclamp]], i32 [[smax_len]], i32 %n
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; CHECK: [[upper_limit_cmp:[^ ]+]] = icmp sgt i32 [[upper_limit_loclamp]], 0
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; CHECK: [[upper_limit:[^ ]+]] = select i1 [[upper_limit_cmp]], i32 [[upper_limit_loclamp]], i32 0
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entry:
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%len.a = load i32, i32* %a_len_ptr, !range !0
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%len.b = load i32, i32* %b_len_ptr, !range !0
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%first.itr.check = icmp sgt i32 %n, 0
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br i1 %first.itr.check, label %loop, label %exit
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loop:
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%idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]
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%idx.next = add i32 %idx, 1
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%abc.a = icmp slt i32 %idx, %len.a
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%abc.b = icmp slt i32 %idx, %len.b
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%abc = and i1 %abc.a, %abc.b
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br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1
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; CHECK: loop:
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; CHECK: %abc = and i1 true, true
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; CHECK: br i1 %abc, label %in.bounds, label %[[oob_loopexit:[^ ,]+]], !prof !1
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; CHECK: [[oob_loopexit]]:
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; CHECK-NEXT: br label %out.of.bounds
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in.bounds:
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%addr.a = getelementptr i32, i32* %arr_a, i32 %idx
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store i32 0, i32* %addr.a
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%addr.b = getelementptr i32, i32* %arr_b, i32 %idx
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store i32 -1, i32* %addr.b
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%next = icmp slt i32 %idx.next, %n
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br i1 %next, label %loop, label %exit
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out.of.bounds:
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ret void
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exit:
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ret void
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}
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!0 = !{i32 0, i32 2147483647}
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!1 = !{!"branch_weights", i32 64, i32 4}
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