a084c0388e
clang/lib/CodeGen/CodeGenModule sets dso_local on applicable function declarations, we don't need to duplicate the work in TargetMachine:shouldAssumeDSOLocal. (Actually the long-term goal (started by r324535) is to drop TargetMachine::shouldAssumeDSOLocal.) By not implying dso_local, we will respect dso_local/dso_preemptable specifiers set by the frontend. This allows the proposed -fno-direct-access-external-data option to work with -fno-pic and prevent a canonical PLT entry (SHN_UNDEF with non-zero st_value) when taking the address of a function symbol. This patch should be NFC in terms of the Clang emitted assembly because the case we don't set dso_local is a case Clang sets dso_local. However, some tests don't set dso_local on some function declarations and expose some differences. Most tests have been fixed to be more robust in the previous commit.
277 lines
9.4 KiB
LLVM
277 lines
9.4 KiB
LLVM
; RUN: llc -mtriple x86_64-pc-linux -relocation-model=static < %s | \
|
|
; RUN: FileCheck --check-prefixes=COMMON,STATIC %s
|
|
; RUN: llc -mtriple x86_64-pc-linux -relocation-model=pic < %s | \
|
|
; RUN: FileCheck --check-prefixes=COMMON,CHECK %s
|
|
; RUN: llc -mtriple x86_64-pc-linux -relocation-model=dynamic-no-pic < %s | \
|
|
; RUN: FileCheck --check-prefixes=COMMON,CHECK %s
|
|
|
|
; 32 bits
|
|
|
|
; RUN: llc -mtriple i386-pc-linux \
|
|
; RUN: -relocation-model=pic < %s | FileCheck --check-prefix=CHECK32 %s
|
|
|
|
; globals
|
|
|
|
@strong_default_global = global i32 42
|
|
define i32* @get_strong_default_global() {
|
|
ret i32* @strong_default_global
|
|
}
|
|
; CHECK: movq strong_default_global@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $strong_default_global, %eax
|
|
; CHECK32: movl strong_default_global@GOT(%eax), %eax
|
|
|
|
@strong_hidden_global = hidden global i32 42
|
|
define i32* @get_hidden_default_global() {
|
|
ret i32* @strong_hidden_global
|
|
}
|
|
; CHECK: leaq strong_hidden_global(%rip), %rax
|
|
; STATIC: movl $strong_hidden_global, %eax
|
|
; CHECK32: leal strong_hidden_global@GOTOFF(%eax), %eax
|
|
|
|
@weak_default_global = weak global i32 42
|
|
define i32* @get_weak_default_global() {
|
|
ret i32* @weak_default_global
|
|
}
|
|
; CHECK: movq weak_default_global@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $weak_default_global, %eax
|
|
; CHECK32: movl weak_default_global@GOT(%eax), %eax
|
|
|
|
@external_default_global = external global i32
|
|
define i32* @get_external_default_global() {
|
|
ret i32* @external_default_global
|
|
}
|
|
; CHECK: movq external_default_global@GOTPCREL(%rip), %rax
|
|
; STATIC: movq external_default_global@GOTPCREL(%rip), %rax
|
|
; CHECK32: movl external_default_global@GOT(%eax), %eax
|
|
|
|
@strong_local_global = dso_local global i32 42
|
|
define i32* @get_strong_local_global() {
|
|
ret i32* @strong_local_global
|
|
}
|
|
; CHECK: leaq .Lstrong_local_global$local(%rip), %rax
|
|
; STATIC: movl $strong_local_global, %eax
|
|
; CHECK32: leal .Lstrong_local_global$local@GOTOFF(%eax), %eax
|
|
|
|
@weak_local_global = weak dso_local global i32 42
|
|
define i32* @get_weak_local_global() {
|
|
ret i32* @weak_local_global
|
|
}
|
|
; CHECK: leaq weak_local_global(%rip), %rax
|
|
; STATIC: movl $weak_local_global, %eax
|
|
; CHECK32: leal weak_local_global@GOTOFF(%eax), %eax
|
|
|
|
@external_local_global = external dso_local global i32
|
|
define i32* @get_external_local_global() {
|
|
ret i32* @external_local_global
|
|
}
|
|
; CHECK: leaq external_local_global(%rip), %rax
|
|
; STATIC: movl $external_local_global, %eax
|
|
; CHECK32: leal external_local_global@GOTOFF(%eax), %eax
|
|
|
|
|
|
@strong_preemptable_global = dso_preemptable global i32 42
|
|
define i32* @get_strong_preemptable_global() {
|
|
ret i32* @strong_preemptable_global
|
|
}
|
|
; CHECK: movq strong_preemptable_global@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $strong_preemptable_global, %eax
|
|
; CHECK32: movl strong_preemptable_global@GOT(%eax), %eax
|
|
|
|
@weak_preemptable_global = weak dso_preemptable global i32 42
|
|
define i32* @get_weak_preemptable_global() {
|
|
ret i32* @weak_preemptable_global
|
|
}
|
|
; CHECK: movq weak_preemptable_global@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $weak_preemptable_global, %eax
|
|
; CHECK32: movl weak_preemptable_global@GOT(%eax), %eax
|
|
|
|
@external_preemptable_global = external dso_preemptable global i32
|
|
define i32* @get_external_preemptable_global() {
|
|
ret i32* @external_preemptable_global
|
|
}
|
|
; CHECK: movq external_preemptable_global@GOTPCREL(%rip), %rax
|
|
; STATIC: movq external_preemptable_global@GOTPCREL(%rip), %rax
|
|
; CHECK32: movl external_preemptable_global@GOT(%eax), %eax
|
|
|
|
; aliases
|
|
@aliasee = global i32 42
|
|
|
|
@strong_default_alias = alias i32, i32* @aliasee
|
|
define i32* @get_strong_default_alias() {
|
|
ret i32* @strong_default_alias
|
|
}
|
|
; CHECK: movq strong_default_alias@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $strong_default_alias, %eax
|
|
; CHECK32: movl strong_default_alias@GOT(%eax), %eax
|
|
|
|
@strong_hidden_alias = hidden alias i32, i32* @aliasee
|
|
define i32* @get_strong_hidden_alias() {
|
|
ret i32* @strong_hidden_alias
|
|
}
|
|
; CHECK: leaq strong_hidden_alias(%rip), %rax
|
|
; STATIC: movl $strong_hidden_alias, %eax
|
|
; CHECK32: leal strong_hidden_alias@GOTOFF(%eax), %eax
|
|
|
|
@weak_default_alias = weak alias i32, i32* @aliasee
|
|
define i32* @get_weak_default_alias() {
|
|
ret i32* @weak_default_alias
|
|
}
|
|
; CHECK: movq weak_default_alias@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $weak_default_alias, %eax
|
|
; CHECK32: movl weak_default_alias@GOT(%eax), %eax
|
|
|
|
@strong_local_alias = dso_local alias i32, i32* @aliasee
|
|
define i32* @get_strong_local_alias() {
|
|
ret i32* @strong_local_alias
|
|
}
|
|
; CHECK: leaq .Lstrong_local_alias$local(%rip), %rax
|
|
; STATIC: movl $strong_local_alias, %eax
|
|
; CHECK32: leal .Lstrong_local_alias$local@GOTOFF(%eax), %eax
|
|
|
|
@weak_local_alias = weak dso_local alias i32, i32* @aliasee
|
|
define i32* @get_weak_local_alias() {
|
|
ret i32* @weak_local_alias
|
|
}
|
|
; CHECK: leaq weak_local_alias(%rip), %rax
|
|
; STATIC: movl $weak_local_alias, %eax
|
|
; CHECK32: leal weak_local_alias@GOTOFF(%eax), %eax
|
|
|
|
|
|
@strong_preemptable_alias = dso_preemptable alias i32, i32* @aliasee
|
|
define i32* @get_strong_preemptable_alias() {
|
|
ret i32* @strong_preemptable_alias
|
|
}
|
|
; CHECK: movq strong_preemptable_alias@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $strong_preemptable_alias, %eax
|
|
; CHECK32: movl strong_preemptable_alias@GOT(%eax), %eax
|
|
|
|
@weak_preemptable_alias = weak dso_preemptable alias i32, i32* @aliasee
|
|
define i32* @get_weak_preemptable_alias() {
|
|
ret i32* @weak_preemptable_alias
|
|
}
|
|
; CHECK: movq weak_preemptable_alias@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $weak_preemptable_alias, %eax
|
|
; CHECK32: movl weak_preemptable_alias@GOT(%eax), %eax
|
|
|
|
; functions
|
|
|
|
define void @strong_default_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_strong_default_function() {
|
|
ret void()* @strong_default_function
|
|
}
|
|
; CHECK: movq strong_default_function@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $strong_default_function, %eax
|
|
; CHECK32: movl strong_default_function@GOT(%eax), %eax
|
|
|
|
define hidden void @strong_hidden_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_strong_hidden_function() {
|
|
ret void()* @strong_hidden_function
|
|
}
|
|
; CHECK: leaq strong_hidden_function(%rip), %rax
|
|
; STATIC: movl $strong_hidden_function, %eax
|
|
; CHECK32: leal strong_hidden_function@GOTOFF(%eax), %eax
|
|
|
|
define weak void @weak_default_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_weak_default_function() {
|
|
ret void()* @weak_default_function
|
|
}
|
|
; CHECK: movq weak_default_function@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $weak_default_function, %eax
|
|
; CHECK32: movl weak_default_function@GOT(%eax), %eax
|
|
|
|
declare void @external_default_function()
|
|
define void()* @get_external_default_function() {
|
|
ret void()* @external_default_function
|
|
}
|
|
; CHECK: movq external_default_function@GOTPCREL(%rip), %rax
|
|
; STATIC: movq external_default_function@GOTPCREL(%rip), %rax
|
|
; CHECK32: movl external_default_function@GOT(%eax), %eax
|
|
|
|
define dso_local void @strong_local_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_strong_local_function() {
|
|
ret void()* @strong_local_function
|
|
}
|
|
; COMMON: {{^}}strong_local_function:
|
|
; CHECK-NEXT: .Lstrong_local_function$local:
|
|
; CHECK: leaq .Lstrong_local_function$local(%rip), %rax
|
|
; STATIC: movl $strong_local_function, %eax
|
|
; CHECK32: leal .Lstrong_local_function$local@GOTOFF(%eax), %eax
|
|
|
|
define weak dso_local void @weak_local_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_weak_local_function() {
|
|
ret void()* @weak_local_function
|
|
}
|
|
; CHECK: leaq weak_local_function(%rip), %rax
|
|
; STATIC: movl $weak_local_function, %eax
|
|
; CHECK32: leal weak_local_function@GOTOFF(%eax), %eax
|
|
|
|
declare dso_local void @external_local_function()
|
|
define void()* @get_external_local_function() {
|
|
ret void()* @external_local_function
|
|
}
|
|
; CHECK: leaq external_local_function(%rip), %rax
|
|
; STATIC: movl $external_local_function, %eax
|
|
; CHECK32: leal external_local_function@GOTOFF(%eax), %eax
|
|
|
|
|
|
define dso_preemptable void @strong_preemptable_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_strong_preemptable_function() {
|
|
ret void()* @strong_preemptable_function
|
|
}
|
|
; CHECK: movq strong_preemptable_function@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $strong_preemptable_function, %eax
|
|
; CHECK32: movl strong_preemptable_function@GOT(%eax), %eax
|
|
|
|
define weak dso_preemptable void @weak_preemptable_function() {
|
|
ret void
|
|
}
|
|
define void()* @get_weak_preemptable_function() {
|
|
ret void()* @weak_preemptable_function
|
|
}
|
|
; CHECK: movq weak_preemptable_function@GOTPCREL(%rip), %rax
|
|
; STATIC: movl $weak_preemptable_function, %eax
|
|
; CHECK32: movl weak_preemptable_function@GOT(%eax), %eax
|
|
|
|
declare dso_preemptable void @external_preemptable_function()
|
|
define void()* @get_external_preemptable_function() {
|
|
ret void()* @external_preemptable_function
|
|
}
|
|
; CHECK: movq external_preemptable_function@GOTPCREL(%rip), %rax
|
|
; STATIC: movq external_preemptable_function@GOTPCREL(%rip), %rax
|
|
; CHECK32: movl external_preemptable_function@GOT(%eax), %eax
|
|
|
|
!llvm.module.flags = !{!0}
|
|
!0 = !{i32 7, !"PIC Level", i32 2}
|
|
|
|
; COMMON: {{^}}strong_local_global:
|
|
; CHECK-NEXT: .Lstrong_local_global$local:
|
|
|
|
; COMMON: .globl strong_default_alias
|
|
; COMMON-NEXT: .set strong_default_alias, aliasee
|
|
; COMMON-NEXT: .globl strong_hidden_alias
|
|
; COMMON-NEXT: .hidden strong_hidden_alias
|
|
; COMMON-NEXT: .set strong_hidden_alias, aliasee
|
|
; COMMON-NEXT: .weak weak_default_alias
|
|
; COMMON-NEXT: .set weak_default_alias, aliasee
|
|
; COMMON-NEXT: .globl strong_local_alias
|
|
; COMMON-NEXT: .set strong_local_alias, aliasee
|
|
; CHECK-NEXT: .set .Lstrong_local_alias$local, aliasee
|
|
; COMMON-NEXT: .weak weak_local_alias
|
|
; COMMON-NEXT: .set weak_local_alias, aliasee
|
|
; COMMON-NEXT: .globl strong_preemptable_alias
|
|
; COMMON-NEXT: .set strong_preemptable_alias, aliasee
|
|
; COMMON-NEXT: .weak weak_preemptable_alias
|
|
; COMMON-NEXT: .set weak_preemptable_alias, aliasee
|