1 ; RUN: opt < %s -indirectbr-expand -S | FileCheck %s 2 ; 3 ; REQUIRES: x86-registered-target 4 5 target triple = "x86_64-unknown-linux-gnu" 6 7 @test1.targets = constant [4 x i8*] [i8* blockaddress(@test1, %bb0), 8 i8* blockaddress(@test1, %bb1), 9 i8* blockaddress(@test1, %bb2), 10 i8* blockaddress(@test1, %bb3)] 11 ; CHECK-LABEL: @test1.targets = constant [4 x i8*] 12 ; CHECK: [i8* inttoptr (i64 1 to i8*), 13 ; CHECK: i8* inttoptr (i64 2 to i8*), 14 ; CHECK: i8* inttoptr (i64 3 to i8*), 15 ; CHECK: i8* blockaddress(@test1, %bb3)] 16 17 define void @test1(i64* readonly %p, i64* %sink) #0 { 18 ; CHECK-LABEL: define void @test1( 19 entry: 20 %i0 = load i64, i64* %p 21 %target.i0 = getelementptr [4 x i8*], [4 x i8*]* @test1.targets, i64 0, i64 %i0 22 %target0 = load i8*, i8** %target.i0 23 ; Only a subset of blocks are viable successors here. 24 indirectbr i8* %target0, [label %bb0, label %bb1] 25 ; CHECK-NOT: indirectbr 26 ; CHECK: %[[ENTRY_V:.*]] = ptrtoint i8* %{{.*}} to i64 27 ; CHECK-NEXT: br label %[[SWITCH_BB:.*]] 28 29 bb0: 30 store volatile i64 0, i64* %sink 31 br label %latch 32 33 bb1: 34 store volatile i64 1, i64* %sink 35 br label %latch 36 37 bb2: 38 store volatile i64 2, i64* %sink 39 br label %latch 40 41 bb3: 42 store volatile i64 3, i64* %sink 43 br label %latch 44 45 latch: 46 %i.next = load i64, i64* %p 47 %target.i.next = getelementptr [4 x i8*], [4 x i8*]* @test1.targets, i64 0, i64 %i.next 48 %target.next = load i8*, i8** %target.i.next 49 ; A different subset of blocks are viable successors here. 50 indirectbr i8* %target.next, [label %bb1, label %bb2] 51 ; CHECK-NOT: indirectbr 52 ; CHECK: %[[LATCH_V:.*]] = ptrtoint i8* %{{.*}} to i64 53 ; CHECK-NEXT: br label %[[SWITCH_BB]] 54 ; 55 ; CHECK: [[SWITCH_BB]]: 56 ; CHECK-NEXT: %[[V:.*]] = phi i64 [ %[[ENTRY_V]], %entry ], [ %[[LATCH_V]], %latch ] 57 ; CHECK-NEXT: switch i64 %[[V]], label %bb0 [ 58 ; CHECK-NEXT: i64 2, label %bb1 59 ; CHECK-NEXT: i64 3, label %bb2 60 ; CHECK-NEXT: ] 61 } 62 63 attributes #0 = { "target-features"="+retpoline" } 64
