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| # REQUIRES: ppc
# RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %s -o %t1.o
# RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/ppc64-bsymbolic-local-def.s -o %t2.o
# RUN: ld.lld -Bsymbolic -shared %t1.o %t2.o -o %t
# RUN: llvm-objdump -d -r %t | FileCheck %s
# RUN: not ld.lld -shared %t1.o %t2.o -o %t 2>&1 | FileCheck --check-prefix=FAIL %s
# RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %s -o %t1.o
# RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %p/Inputs/ppc64-bsymbolic-local-def.s -o %t2.o
# RUN: ld.lld -Bsymbolic -shared %t1.o %t2.o -o %t
# RUN: llvm-objdump -d -r %t | FileCheck %s
# RUN: not ld.lld -shared %t1.o %t2.o -o %t 2>&1 | FileCheck --check-prefix=FAIL %s
# FAIL: call lacks nop, can't restore toc
# Test to document the toc-restore behavior with -Bsymbolic option. Since
# -Bsymbolic causes the call to bind to the internal defintion we know the
# caller and callee share the same TOC base. This means branching to the
# local entry point of the callee, and no need for a nop to follow the call
# (since there is no need to restore the TOC-pointer after the call).
.abiversion 2
.section ".text"
.p2align 2
.global caller
.type caller, @function
caller:
.Lcaller_gep:
addis 2, 12, .TOC.-.Lcaller_gep@ha
addi 2, 2, .TOC.-.Lcaller_gep@l
.Lcaller_lep:
.localentry caller, .-caller
mflr 0
std 0, -16(1)
stdu 1, -32(1)
bl def
mr 31, 3
bl not_defined
nop
add 3, 3, 31
addi 1, 1, 32
ld 0, -16(1)
mtlr 0
blr
# Note that the bl .+44 is a call to def's local entry, jumping past the first 2
# instructions. Branching to the global entry would corrupt the TOC pointer
# since the global entry requires that %r12 hold the address of the function
# being called.
# CHECK-LABEL: caller
# CHECK: bl .+44
# CHECK-NEXT: mr 31, 3
# CHECK-NEXT: bl .+44
# CHECK-NEXT: ld 2, 24(1)
# CHECK-NEXT: add 3, 3, 31
# CHECK-NEXT: addi 1, 1, 32
# CHECK-NEXT: ld 0, -16(1)
# CHECK-NEXT: mtlr 0
# CHECK-NEXT: blr
# CHECK-EMPTY:
# CHECK-NEXT: def:
# CHECK-NEXT: addis 2, 12, 2
# CHECK-NEXT: addi 2, 2, -32456
# CHECK-NEXT: li 3, 55
# CHECK-NEXT: blr
|