4b5ec7fb80
Recommitting https://reviews.llvm.org/rL344544 after fixing undefined behavior from left-shifting a negative value. Original commit message: This support is slightly different then the X86_64 implementation in that calls to __morestack don't need to get rewritten to calls to __moresatck_non_split when a split-stack caller calls a non-split-stack callee. Instead the size of the stack frame requested by the caller is adjusted prior to the call to __morestack. The size the stack-frame will be adjusted by is tune-able through a new --split-stack-adjust-size option. llvm-svn: 344622
54 lines
1.4 KiB
ArmAsm
54 lines
1.4 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-no-split-stack.s -o %t2.o
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# RUN: not ld.lld --defsym __morestack=0x10010000 %t1.o %t2.o -o %t 2>&1 | FileCheck %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-no-split-stack.s -o %t2.o
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# RUN: not ld.lld --defsym __morestack=0x10010000 %t1.o %t2.o -o %t 2>&1 | FileCheck %s
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# CHECK: error: {{.*}}.o:(.text): wrong_regs (with -fsplit-stack) calls nss_callee (without -fsplit-stack), but couldn't adjust its prologue
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.abiversion 2
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.section ".text"
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.p2align 2
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.global wrong_regs
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.type wrong_regs, @function
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wrong_regs:
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.Lwr_gep:
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addis 2, 12, .TOC.-.Lwr_gep@ha
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addi 2, 2, .TOC.-.Lwr_gep@l
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.localentry wrong_regs, .-wrong_regs
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ld 0, -0x7040(13)
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addis 5, 2, -1
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addi 5, 5, -32
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addi 12, 1, -32
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nop
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cmpld 7, 12, 0
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blt- 7, .Lwr_alloc_more
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.Lwr_body:
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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 nss_callee
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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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.Lwr_alloc_more:
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mflr 0
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std 0, 16(1)
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bl __morestack
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ld 0, 16(1)
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mtlr 0
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blr
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b .Lwr_body
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.size wrong_regs, .-wrong_regs
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.section .note.GNU-split-stack,"",@progbits
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