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* don't print range check warnings when evaluating inlined explicit typecasts

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git-svn-id: trunk@46904 -
This commit is contained in:
Jonas Maebe 2020-09-20 10:29:51 +00:00
parent e83d214e98
commit 9f42931eeb
3 changed files with 28 additions and 1 deletions
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1
.gitattributes vendored
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@ -13350,6 +13350,7 @@ tests/tbs/tb0673.pp svneol=native#text/pascal
tests/tbs/tb0674.pp svneol=native#text/pascal
tests/tbs/tb0675.pp svneol=native#text/pascal
tests/tbs/tb0676.pp svneol=native#text/pascal
tests/tbs/tb0676a.pp svneol=native#text/plain
tests/tbs/ub0060.pp svneol=native#text/plain
tests/tbs/ub0069.pp svneol=native#text/plain
tests/tbs/ub0119.pp svneol=native#text/plain

8
compiler/ncnv.pas
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@ -3175,7 +3175,13 @@ implementation
if (target_info.endian = endian_big) and (nf_absolute in flags) then
swap_const_value(tordconstnode(left).value,tordconstnode(left).resultdef.size);
if not(nf_generic_para in flags) then
adaptrange(resultdef,tordconstnode(left).value,([nf_internal,nf_absolute]*flags)<>[],nf_explicit in flags,cs_check_range in localswitches);
adaptrange(
resultdef,tordconstnode(left).value,
{ when evaluating an explicit typecast during inlining, don't warn about
lost bits; only warn if someone literally typed e.g. byte($1ff) }
(([nf_internal,nf_absolute]*flags)<>[]) or (forinline and (nf_explicit in flags)),
nf_explicit in flags,
cs_check_range in localswitches);
{ swap value back, but according to new type }
if (target_info.endian = endian_big) and (nf_absolute in flags) then
swap_const_value(tordconstnode(left).value,resultdef.size);

20
tests/tbs/tb0676a.pp Normal file
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@ -0,0 +1,20 @@
{ %opt=-vw -Sew }
{ %norun }
{$mode objfpc}
function SwapEndian(const AValue: Word): Word;inline;
begin
Result := Word((AValue shr 8) or (AValue shl 8));
end;
const
Value = 8008;
var
v: Word;
begin
writeln(sizeof(Value));
Writeln(HexStr(Value, 4));
v := swapendian(Value);
Writeln(HexStr(v, 4));