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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes='simplifycfg<switch-to-lookup>' -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
define i32 @switch_of_powers_two(i32 %arg) {
; CHECK-LABEL: define i32 @switch_of_powers_two(
; CHECK-SAME: i32 [[ARG:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[TMP0:%.*]] = call i32 @llvm.cttz.i32(i32 [[ARG]], i1 true)
; CHECK-NEXT: [[TMP1:%.*]] = zext nneg i32 [[TMP0]] to i64
; CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds [7 x i32], ptr @switch.table.switch_of_powers_two, i64 0, i64 [[TMP1]]
; CHECK-NEXT: [[SWITCH_LOAD:%.*]] = load i32, ptr [[SWITCH_GEP]], align 4
; CHECK-NEXT: ret i32 [[SWITCH_LOAD]]
;
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
]
default_case: unreachable
bb1: br label %return
bb2: br label %return
bb3: br label %return
bb4: br label %return
bb5: br label %return
return:
%phi = phi i32 [ 3, %bb1 ], [ 2, %bb2 ], [ 1, %bb3 ], [ 0, %bb4 ], [ 42, %bb5 ]
ret i32 %phi
}
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