2812c15156
Weak functions can be replaced by other functions at link time. Previously it was assumed that no matter what the weak callee function was replaced with it would still share the same TOC as the caller. This is no longer true as a weak callee with a TOC setup can be replaced by another function that was compiled with PC Relative and does not have a TOC at all. This patch makes sure that all calls to functions defined as weak from a caller that has a valid TOC have a nop after the call to allow a place for the linker to restore the TOC. Reviewed By: NeHuang Differential Revision: https://reviews.llvm.org/D91983
303 lines
8.3 KiB
LLVM
303 lines
8.3 KiB
LLVM
; RUN: llc -mtriple powerpc64le-unknown-gnu-linux -relocation-model=pic \
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; RUN: < %s | FileCheck %s
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; RUN: llc -mtriple powerpc64le-unknown-gnu-linux -relocation-model=static \
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; RUN: < %s | FileCheck --check-prefix=STATIC %s
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; RUN: llc -mtriple powerpc64le-unknown-gnu-linux -relocation-model=pic \
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; RUN: < %s | FileCheck %s
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; globals
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@strong_default = global i32 55
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define i32* @get_strong_default() #0 {
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ret i32* @strong_default
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; STATIC-LABEL: @get_strong_default
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; STATIC: addis 3, 2, strong_default@toc@ha
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; STATIC: addi 3, 3, strong_default@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_strong_default
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; CHECK: addis 3, 2, .LC0@toc@ha
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; CHECK: ld 3, .LC0@toc@l(3)
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; CHECK: blr
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}
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@weak_default = weak global i32 55
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define i32* @get_weak_default() #0 {
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ret i32* @weak_default
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; STATIC-LABEL: @get_weak_default
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; STATIC: addis 3, 2, weak_default@toc@ha
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; STATIC: addi 3, 3, weak_default@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_weak_default
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; CHECK: addis 3, 2, .LC1@toc@ha
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; CHECK: ld 3, .LC1@toc@l(3)
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; CHECK: blr
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}
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@external_default_global = external global i32
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define i32* @get_external_default_global() {
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ret i32* @external_default_global
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; STATIC-LABEL: @get_external_default_global
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; STATIC: addis 3, 2, .LC0@toc@ha
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; STATIC: ld 3, .LC0@toc@l(3)
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; STATIC: blr
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; CHECK-LABEL: @get_external_default_global
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; CHECK: addis 3, 2, .LC2@toc@ha
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; CHECK: ld 3, .LC2@toc@l(3)
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; CHECK: blr
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}
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@strong_local_global = dso_local global i32 55
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define i32* @get_strong_local_global() {
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ret i32* @strong_local_global
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; STATIC-LABEL: @get_strong_local_global
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; STATIC: addis 3, 2, strong_local_global@toc@ha
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; STATIC: addi 3, 3, strong_local_global@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_strong_local_global
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; CHECK: addis 3, 2, strong_local_global@toc@ha
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; CHECK: addi 3, 3, strong_local_global@toc@l
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; CHECK: blr
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}
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@weak_local_global = weak dso_local global i32 42
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define i32* @get_weak_local_global() {
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ret i32* @weak_local_global
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; STATIC-LABEL: @get_weak_local_global
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; STATIC: addis 3, 2, weak_local_global@toc@ha
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; STATIC: addi 3, 3, weak_local_global@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_weak_local_global
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; CHECK: addis 3, 2, weak_local_global@toc@ha
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; CHECK: addi 3, 3, weak_local_global@toc@l
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; CHECK: blr
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}
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@external_local_global = external dso_local global i32
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define i32* @get_external_local_global() {
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ret i32* @external_local_global
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; STATIC-LABEL: @get_external_local_global
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; STATIC: addis 3, 2, external_local_global@toc@ha
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; STATIC: addi 3, 3, external_local_global@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_external_local_global
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; CHECK: addis 3, 2, external_local_global@toc@ha
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; CHECK: addi 3, 3, external_local_global@toc@l
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; CHECK: blr
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}
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@strong_preemptable_global = dso_preemptable global i32 42
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define i32* @get_strong_preemptable_global() {
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ret i32* @strong_preemptable_global
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; STATIC-LABEL: @get_strong_preemptable_global
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; STATIC: addis 3, 2, strong_preemptable_global@toc@ha
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; STATIC: addi 3, 3, strong_preemptable_global@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_strong_preemptable_global
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; CHECK: addis 3, 2, .LC3@toc@ha
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; CHECK: ld 3, .LC3@toc@l(3)
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; CHECK: blr
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}
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@weak_preemptable_global = weak dso_preemptable global i32 42
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define i32* @get_weak_preemptable_global() {
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ret i32* @weak_preemptable_global
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; STATIC-LABEL: @get_weak_preemptable_global
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; STATIC: addis 3, 2, weak_preemptable_global@toc@ha
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; STATIC: addi 3, 3, weak_preemptable_global@toc@l
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; STATIC: blr
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; CHECK-LABEL: @get_weak_preemptable_global
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; CHECK: addis 3, 2, .LC4@toc@ha
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; CHECK: ld 3, .LC4@toc@l(3)
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; CHECK: blr
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}
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@external_preemptable_global = external dso_preemptable global i32
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define i32* @get_external_preemptable_global() {
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ret i32* @external_preemptable_global
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; STATIC-LABEL: @get_external_preemptable_global
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; STATIC: addis 3, 2, .LC1@toc@ha
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; STATIC: ld 3, .LC1@toc@l(3)
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; STATIC: blr
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; CHECK-LABEL: @get_external_preemptable_global
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; CHECK: addis 3, 2, .LC5@toc@ha
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; CHECK: ld 3, .LC5@toc@l(3)
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; CHECK: blr
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}
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; functions
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define signext i32 @strong_default_function(i32 %i) {
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ret i32 %i
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}
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define signext i32 @strong_default_function_caller(i32 %i) {
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%call = notail call signext i32 @strong_default_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @strong_default_function_caller
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; STATIC: bl strong_default_function
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; STATIC-NOT: nop
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; STATIC: blr
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; CHECK-LABEL: @strong_default_function_caller
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; CHECK: bl strong_default_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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define weak signext i32 @weak_default_function(i32 %i) {
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ret i32 %i
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}
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define signext i32 @weak_default_function_caller(i32 %i) {
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%call = notail call signext i32 @weak_default_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @weak_default_function_caller
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; STATIC: bl weak_default_function
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; STATIC-NEXT: nop
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; STATIC: blr
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; CHECK-LABEL: @weak_default_function_caller
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; CHECK: bl weak_default_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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declare i32 @external_default_function(i32 %i)
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define i32 @external_default_function_caller(i32 %i) {
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%call = notail call signext i32 @external_default_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @external_default_function_caller
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; STATIC: bl external_default_function
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; STATIC-NEXT: nop
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; STATIC: blr
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; CHECK-LABEL: @external_default_function_caller
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; CHECK: bl external_default_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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define dso_local signext i32 @strong_local_function(i32 %i) {
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ret i32 %i
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}
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define signext i32 @strong_local_function_caller(i32 %i) {
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%call = notail call signext i32 @strong_local_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @strong_local_function_caller
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; STATIC: bl strong_local_function
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; STATIC-NOT: nop
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; STATIC: blr
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; CHECK-LABEL: @strong_local_function_caller
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; CHECK: bl strong_local_function
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; CHECK-NOT: nop
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; CHECK: blr
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}
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define weak dso_local signext i32 @weak_local_function(i32 %i) {
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ret i32 %i
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}
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define signext i32 @weak_local_function_caller(i32 %i) {
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%call = notail call signext i32 @weak_local_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @weak_local_function_caller
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; STATIC: bl weak_local_function
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; STATIC-NEXT: nop
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; STATIC: blr
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; CHECK-LABEL: @weak_local_function_caller
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; CHECK: bl weak_local_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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declare dso_local i32 @external_local_function(i32 %i)
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define i32 @external_local_function_caller(i32 %i) {
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%call = notail call signext i32 @external_local_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @external_local_function_caller
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; STATIC: bl external_local_function
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; STATIC-NEXT: nop
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; STATIC: blr
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; CHECK-LABEL: @external_local_function_caller
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; CHECK: bl external_local_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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define dso_preemptable signext i32 @strong_preemptable_function(i32 %i) {
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ret i32 %i
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}
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define signext i32 @strong_preemptable_function_caller(i32 %i) {
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%call = notail call signext i32 @strong_preemptable_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @strong_preemptable_function_caller
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; STATIC: bl strong_preemptable_function
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; STATIC-NOT: nop
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; STATIC: blr
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; CHECK-LABEL: @strong_preemptable_function_caller
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; CHECK: bl strong_preemptable_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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define weak dso_preemptable signext i32 @weak_preemptable_function(i32 %i) {
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ret i32 %i
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}
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define signext i32 @weak_preemptable_function_caller(i32 %i) {
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%call = notail call signext i32 @weak_preemptable_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @weak_preemptable_function_caller
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; STATIC: bl weak_preemptable_function
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; STATIC-NEXT: nop
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; STATIC: blr
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; CHECK-LABEL: @weak_preemptable_function_caller
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; CHECK: bl weak_preemptable_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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declare dso_preemptable i32 @external_preemptable_function(i32 %i)
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define i32 @external_preemptable_function_caller(i32 %i) {
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%call = notail call signext i32 @external_preemptable_function(i32 signext %i)
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ret i32 %call
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; STATIC-LABEL: @external_preemptable_function_caller
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; STATIC: bl external_preemptable_function
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; STATIC-NEXT: nop
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; STATIC: blr
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; CHECK-LABEL: @external_preemptable_function_caller
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; CHECK: bl external_preemptable_function
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; CHECK-NEXT: nop
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; CHECK: blr
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}
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