| ; RUN: opt < %s -indirectbr-expand -S | FileCheck %s |
| ; |
| ; REQUIRES: x86-registered-target |
| |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @test1.targets = constant [4 x i8*] [i8* blockaddress(@test1, %bb0), |
| i8* blockaddress(@test1, %bb1), |
| i8* blockaddress(@test1, %bb2), |
| i8* blockaddress(@test1, %bb3)] |
| ; CHECK-LABEL: @test1.targets = constant [4 x i8*] |
| ; CHECK: [i8* inttoptr (i64 1 to i8*), |
| ; CHECK: i8* inttoptr (i64 2 to i8*), |
| ; CHECK: i8* inttoptr (i64 3 to i8*), |
| ; CHECK: i8* blockaddress(@test1, %bb3)] |
| |
| define void @test1(i64* readonly %p, i64* %sink) #0 { |
| ; CHECK-LABEL: define void @test1( |
| entry: |
| %i0 = load i64, i64* %p |
| %target.i0 = getelementptr [4 x i8*], [4 x i8*]* @test1.targets, i64 0, i64 %i0 |
| %target0 = load i8*, i8** %target.i0 |
| ; Only a subset of blocks are viable successors here. |
| indirectbr i8* %target0, [label %bb0, label %bb1] |
| ; CHECK-NOT: indirectbr |
| ; CHECK: %[[ENTRY_V:.*]] = ptrtoint i8* %{{.*}} to i64 |
| ; CHECK-NEXT: br label %[[SWITCH_BB:.*]] |
| |
| bb0: |
| store volatile i64 0, i64* %sink |
| br label %latch |
| |
| bb1: |
| store volatile i64 1, i64* %sink |
| br label %latch |
| |
| bb2: |
| store volatile i64 2, i64* %sink |
| br label %latch |
| |
| bb3: |
| store volatile i64 3, i64* %sink |
| br label %latch |
| |
| latch: |
| %i.next = load i64, i64* %p |
| %target.i.next = getelementptr [4 x i8*], [4 x i8*]* @test1.targets, i64 0, i64 %i.next |
| %target.next = load i8*, i8** %target.i.next |
| ; A different subset of blocks are viable successors here. |
| indirectbr i8* %target.next, [label %bb1, label %bb2] |
| ; CHECK-NOT: indirectbr |
| ; CHECK: %[[LATCH_V:.*]] = ptrtoint i8* %{{.*}} to i64 |
| ; CHECK-NEXT: br label %[[SWITCH_BB]] |
| ; |
| ; CHECK: [[SWITCH_BB]]: |
| ; CHECK-NEXT: %[[V:.*]] = phi i64 [ %[[ENTRY_V]], %entry ], [ %[[LATCH_V]], %latch ] |
| ; CHECK-NEXT: switch i64 %[[V]], label %bb0 [ |
| ; CHECK-NEXT: i64 2, label %bb1 |
| ; CHECK-NEXT: i64 3, label %bb2 |
| ; CHECK-NEXT: ] |
| } |
| |
| attributes #0 = { "target-features"="+retpoline" } |
