1; RUN: opt < %s -indirectbr-expand -S | FileCheck %s 2; 3; REQUIRES: x86-registered-target 4 5target 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 17define void @test1(i64* readonly %p, i64* %sink) #0 { 18; CHECK-LABEL: define void @test1( 19entry: 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 29bb0: 30 store volatile i64 0, i64* %sink 31 br label %latch 32 33bb1: 34 store volatile i64 1, i64* %sink 35 br label %latch 36 37bb2: 38 store volatile i64 2, i64* %sink 39 br label %latch 40 41bb3: 42 store volatile i64 3, i64* %sink 43 br label %latch 44 45latch: 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 63attributes #0 = { "target-features"="+retpoline" } 64