--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --scrub-attributes --check-globals
+; RUN: opt -passes=simplifycfg --switch-to-lookup -S %s | FileCheck %s
+target triple = "x86_64-unknown-linux-gnu"
+
+;.
+; CHECK: @[[SWITCH_TABLE_SWITCH_TO_LOOKUP_I64:[a-zA-Z0-9_$"\\.-]+]] = private unnamed_addr constant [3 x i8] c"\03\01\02", align 1
+; CHECK: @[[SWITCH_TABLE_SWITCH_TO_LOOKUP_I128:[a-zA-Z0-9_$"\\.-]+]] = private unnamed_addr constant [3 x i8] c"\03\01\02", align 1
+;.
+define i8 @switch_to_lookup_i64(i128 %x){
+; CHECK-LABEL: @switch_to_lookup_i64(
+; CHECK-NEXT: start:
+; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i128 [[X:%.*]], 3
+; CHECK-NEXT: br i1 [[TMP0]], label [[SWITCH_LOOKUP:%.*]], label [[COMMON_RET:%.*]]
+; CHECK: common.ret:
+; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i8 [ [[SWITCH_LOAD:%.*]], [[SWITCH_LOOKUP]] ], [ 10, [[START:%.*]] ]
+; CHECK-NEXT: ret i8 [[COMMON_RET_OP]]
+; CHECK: switch.lookup:
+; CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds [3 x i8], [3 x i8]* @switch.table.switch_to_lookup_i64, i32 0, i128 [[X]]
+; CHECK-NEXT: [[SWITCH_LOAD]] = load i8, i8* [[SWITCH_GEP]], align 1
+; CHECK-NEXT: br label [[COMMON_RET]]
+;
+start:
+ switch i128 %x, label %default [
+ i128 0, label %end
+ i128 1, label %bb1
+ i128 2, label %bb2
+ ]
+
+bb1:
+ br label %end
+
+bb2:
+ br label %end
+
+default:
+ ret i8 10
+
+end:
+ %p = phi i8 [ 1, %bb1 ], [ 2, %bb2 ], [ 3, %start ]
+ ret i8 %p
+}
+
+define i8 @switch_to_lookup_i128(i128 %x){
+; CHECK-LABEL: @switch_to_lookup_i128(
+; CHECK-NEXT: start:
+; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i128 [[X:%.*]], 3
+; CHECK-NEXT: br i1 [[TMP0]], label [[SWITCH_LOOKUP:%.*]], label [[COMMON_RET:%.*]]
+; CHECK: common.ret:
+; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i8 [ [[SWITCH_LOAD:%.*]], [[SWITCH_LOOKUP]] ], [ 10, [[START:%.*]] ]
+; CHECK-NEXT: ret i8 [[COMMON_RET_OP]]
+; CHECK: switch.lookup:
+; CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds [3 x i8], [3 x i8]* @switch.table.switch_to_lookup_i128, i32 0, i128 [[X]]
+; CHECK-NEXT: [[SWITCH_LOAD]] = load i8, i8* [[SWITCH_GEP]], align 1
+; CHECK-NEXT: br label [[COMMON_RET]]
+;
+start:
+ switch i128 %x, label %default [
+ i128 0, label %end
+ i128 1, label %bb1
+ i128 2, label %bb2
+ ]
+
+bb1:
+ br label %end
+
+bb2:
+ br label %end
+
+default:
+ ret i8 10
+
+end:
+ %p = phi i8 [ 1, %bb1 ], [ 2, %bb2 ], [ 3, %start ]
+ ret i8 %p
+}