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author | yury <yury@3ad0048d-3df7-0310-abae-a5850022a9f2> | 2015-09-16 21:30:20 +0000 |
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committer | yury <yury@3ad0048d-3df7-0310-abae-a5850022a9f2> | 2015-09-16 21:30:20 +0000 |
commit | 5c461671648d2713397111b2be61ad2f1b1b9655 (patch) | |
tree | be9c38c1a4d50093026e65179688a87465e354ac /compiler/arm | |
parent | 17082c33b52e0cf23f5396e3a8bc9c3640d47a79 (diff) | |
download | fpc-5c461671648d2713397111b2be61ad2f1b1b9655.tar.gz |
* ARM: Fixed GOT init when optimization is off.
git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@31728 3ad0048d-3df7-0310-abae-a5850022a9f2
Diffstat (limited to 'compiler/arm')
-rw-r--r-- | compiler/arm/cgcpu.pas | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/compiler/arm/cgcpu.pas b/compiler/arm/cgcpu.pas index 96f59d7afc..a3a60597be 100644 --- a/compiler/arm/cgcpu.pas +++ b/compiler/arm/cgcpu.pas @@ -2355,19 +2355,14 @@ unit cgcpu; current_asmdata.getaddrlabel(l); current_procinfo.aktlocaldata.concat(tai_const.Create_rel_sym_offset(aitconst_32bit,l,current_asmdata.RefAsmSymbol('_GLOBAL_OFFSET_TABLE_'),-8)); cg.a_label(list,l); - if cs_opt_regvar in current_settings.optimizerswitches then - begin - { - When regvars are used, it is needed to perform GOT calculations using the scratch register R12 - and then MOV the result to the GOT register. Otherwise the register allocator will use - register R0 as temp to perform calculations in case if a procedure uses all available registers. - It leads to corruption of R0 which is normally holds a value of the first procedure parameter. - } - list.concat(Taicpu.op_reg_reg_reg(A_ADD,NR_R12,NR_PC,NR_R12)); - list.concat(Taicpu.op_reg_reg(A_MOV,current_procinfo.got,NR_R12)); - end - else - list.concat(Taicpu.op_reg_reg_reg(A_ADD,current_procinfo.got,NR_PC,NR_R12)); + { + It is needed to perform GOT calculations using the scratch register R12 + and then MOV the result to the GOT register. Otherwise the register allocator will use + register R0 as temp to perform calculations in case if a procedure uses all available registers. + It leads to corruption of R0 which is normally holds a value of the first procedure parameter. + } + list.concat(Taicpu.op_reg_reg_reg(A_ADD,NR_R12,NR_PC,NR_R12)); + list.concat(Taicpu.op_reg_reg(A_MOV,current_procinfo.got,NR_R12)); a_reg_dealloc(list,NR_R12); end; end; |