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