TheRock/compiler/amd-llvm/llvm/test/Transforms/SimplifyCFG/X86/debugloc-switch-powers-of-two.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --tool ./build/bin/opt --version 6
; RUN: opt -passes='simplifycfg<switch-to-lookup>' -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s
;; As we replace the switch statement with a set of instructions that may more
;; efficiently perform the conditional check, the DILocation of the switch
;; should be propagated to all of its replacing instructions.

target triple = "x86_64-unknown-linux-gnu"

define i32 @switch_of_powers_two_default_reachable(i32 %arg) !dbg !5 {
; CHECK-LABEL: define i32 @switch_of_powers_two_default_reachable(
; CHECK-SAME: i32 [[ARG:%.*]]) !dbg [[DBG5:![0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = call i32 @llvm.ctpop.i32(i32 [[ARG]]), !dbg [[DBG8:![0-9]+]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 1, !dbg [[DBG8]]
; CHECK-NEXT:    br i1 [[TMP1]], label %[[ENTRY_SPLIT:.*]], label %[[RETURN:.*]], !dbg [[DBG8]]
; CHECK:       [[ENTRY_SPLIT]]:
; CHECK-NEXT:    [[TMP2:%.*]] = call i32 @llvm.cttz.i32(i32 [[ARG]], i1 true), !dbg [[DBG8]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ult i32 [[TMP2]], 7, !dbg [[DBG8]]
; CHECK-NEXT:    br i1 [[TMP3]], label %[[SWITCH_LOOKUP:.*]], label %[[RETURN]], !dbg [[DBG8]]
; CHECK:       [[SWITCH_LOOKUP]]:
; CHECK-NEXT:    [[TMP4:%.*]] = zext nneg i32 [[TMP2]] to i64, !dbg [[DBG8]]
; CHECK-NEXT:    [[SWITCH_GEP:%.*]] = getelementptr inbounds [7 x i32], ptr @switch.table.switch_of_powers_two_default_reachable, i64 0, i64 [[TMP4]], !dbg [[DBG8]]
; CHECK-NEXT:    [[SWITCH_LOAD:%.*]] = load i32, ptr [[SWITCH_GEP]], align 4, !dbg [[DBG8]]
; CHECK-NEXT:    br label %[[RETURN]], !dbg [[DBG8]]
; CHECK:       [[RETURN]]:
; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ [[SWITCH_LOAD]], %[[SWITCH_LOOKUP]] ], [ 5, %[[ENTRY_SPLIT]] ], [ 5, %[[ENTRY]] ]
; CHECK-NEXT:    ret i32 [[PHI]]
;
entry:
  switch i32 %arg, label %default_case [
  i32 1, label %bb1
  i32 8, label %bb2
  i32 16, label %bb3
  i32 32, label %bb4
  i32 64, label %bb5
  ], !dbg !8

default_case:                                     ; preds = %entry
  br label %return

bb1:                                              ; preds = %entry
  br label %return

bb2:                                              ; preds = %entry
  br label %return

bb3:                                              ; preds = %entry
  br label %return

bb4:                                              ; preds = %entry
  br label %return

bb5:                                              ; preds = %entry
  br label %return

return:                                           ; preds = %bb5, %bb4, %bb3, %bb2, %bb1, %default_case
  %phi = phi i32 [ 3, %bb1 ], [ 2, %bb2 ], [ 1, %bb3 ], [ 0, %bb4 ], [ 42, %bb5 ], [ 5, %default_case ]
  ret i32 %phi
}

!llvm.dbg.cu = !{!0}
!llvm.debugify = !{!2, !3}
!llvm.module.flags = !{!4}

!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
!1 = !DIFile(filename: "debugloc-switch-powers-of-two.ll", directory: "/")
!2 = !{i32 9}
!3 = !{i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = distinct !DISubprogram(name: "switch_of_powers_two_default_reachable", linkageName: "switch_of_powers_two_default_reachable", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !7)
!6 = !DISubroutineType(types: !7)
!7 = !{}
!8 = !DILocation(line: 1, column: 1, scope: !5)
;.
; CHECK: [[META0:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C, file: [[META1:![0-9]+]], producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
; CHECK: [[META1]] = !DIFile(filename: "{{.*}}debugloc-switch-powers-of-two.ll", directory: {{.*}})
; CHECK: [[DBG5]] = distinct !DISubprogram(name: "switch_of_powers_two_default_reachable", linkageName: "switch_of_powers_two_default_reachable", scope: null, file: [[META1]], line: 1, type: [[META6:![0-9]+]], scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: [[META0]], retainedNodes: [[META7:![0-9]+]])
; CHECK: [[META6]] = !DISubroutineType(types: [[META7]])
; CHECK: [[META7]] = !{}
; CHECK: [[DBG8]] = !DILocation(line: 1, column: 1, scope: [[DBG5]])
;.