forked from OSchip/llvm-project
64 lines
2.1 KiB
LLVM
64 lines
2.1 KiB
LLVM
|
; 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" }
|