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ppc64: fix rtoc handling

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Save on procedure entry if it performs a call, rather than (only) before every
indirect call
This commit is contained in:
Jonas Maebe 2022-02-05 17:35:35 +01:00
parent 6dd5b63e2d
commit 83c18df69a
1 changed files with 7 additions and 4 deletions
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11
compiler/powerpc64/cgcpu.pas
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@ -337,10 +337,6 @@ begin
reference_reset_base(tmpref, reg, 0, ctempposinvalid, sizeof(pint), []); reference_reset_base(tmpref, reg, 0, ctempposinvalid, sizeof(pint), []);
a_load_ref_reg(list, OS_ADDR, OS_ADDR, tmpref, tempreg); a_load_ref_reg(list, OS_ADDR, OS_ADDR, tmpref, tempreg);
{ save TOC pointer in stackframe }
reference_reset_base(tmpref, NR_STACK_POINTER_REG, get_rtoc_offset, ctempposinvalid, 8, []);
a_load_reg_ref(list, OS_ADDR, OS_ADDR, NR_RTOC, tmpref);
{ move actual function pointer to CTR register } { move actual function pointer to CTR register }
list.concat(taicpu.op_reg(A_MTCTR, tempreg)); list.concat(taicpu.op_reg(A_MTCTR, tempreg));
@ -1273,6 +1269,13 @@ begin
end; end;
end; end;
{ save current RTOC for restoration after calls if necessary }
if pi_do_call in current_procinfo.flags then
begin
reference_reset_base(href,NR_STACK_POINTER_REG,get_rtoc_offset,ctempposinvalid,target_info.stackalign,[]);
a_load_reg_ref(list,OS_ADDR,OS_ADDR,NR_RTOC,href);
end;
{ CR register not used by FPC atm } { CR register not used by FPC atm }
{ keep R1 allocated??? } { keep R1 allocated??? }