xref: /llvm-project/llvm/test/Transforms/JumpTableToSwitch/stride.ll (revision d26b43ff4f7396f79de4b099160262c750d6aba7)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
2; RUN: opt < %s -passes=jump-table-to-switch -verify-dom-info -S | FileCheck %s
3
4@func_array = constant [2 x ptr] [ptr @func0, ptr @func1]
5
6define i32 @func0() {
7  ret i32 1
8}
9
10define i32 @func1() {
11  ret i32 2
12}
13
14define i32 @check_stride(i32 %index) {
15; CHECK-LABEL: define i32 @check_stride(
16; CHECK-SAME: i32 [[INDEX:%.*]]) {
17; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [2 x { ptr, ptr }], ptr @func_array, i32 0, i32 [[INDEX]]
18; CHECK-NEXT:    [[FUNC_PTR:%.*]] = load ptr, ptr [[GEP]], align 8
19; CHECK-NEXT:    switch i32 [[INDEX]], label [[DEFAULT_SWITCH_CASE_UNREACHABLE:%.*]] [
20; CHECK-NEXT:      i32 0, label [[CALL_0:%.*]]
21; CHECK-NEXT:    ]
22; CHECK:       default.switch.case.unreachable:
23; CHECK-NEXT:    unreachable
24; CHECK:       call.0:
25; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @func0()
26; CHECK-NEXT:    br label [[DOTTAIL:%.*]]
27; CHECK:       .tail:
28; CHECK-NEXT:    [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[CALL_0]] ]
29; CHECK-NEXT:    ret i32 [[TMP2]]
30;
31  %gep = getelementptr inbounds [2 x { ptr, ptr }], ptr @func_array, i32 0, i32 %index
32  %func_ptr = load ptr, ptr %gep
33  %result = call i32 %func_ptr()
34  ret i32 %result
35}
36
37