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Allow the operand of sizeof to be an un-parenthesized compound literal.

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This is allowed based on the C standard syntax, but it previously gave a spurious error in ORCA/C, because the parenthesized type name at the beginning of the compound literal was parsed as the complete operand to sizeof.

Here is an example program affected by this:

int main(void) {
        return sizeof (char[]){1,2,3}; // should return 3
}
This commit is contained in:
Stephen Heumann 2024-08-11 20:33:36 -05:00
parent 5f59f152ed
commit 347ad00ff7
2 changed files with 5 additions and 2 deletions
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5
Expression.pas
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@ -2287,7 +2287,9 @@ if token.kind in startExpression then begin
else if opStack^.token.kind = _Alignofsy then else if opStack^.token.kind = _Alignofsy then
doingAlignof := true; doingAlignof := true;
tType := TypeName; tType := TypeName;
if doingSizeof or doingAlignof then begin Match(rparench,12);
if (doingSizeof and (token.kind <> lbracech)) or doingAlignof then
begin
{handle a sizeof operator} {handle a sizeof operator}
op := opStack; op := opStack;
@ -2324,7 +2326,6 @@ if token.kind in startExpression then begin
op^.next := opStack; op^.next := opStack;
opStack := op; opStack := op;
end; {else} end; {else}
Match(rparench,12);
end {if} end {if}
else begin else begin
new(op); {record the '('} new(op); {record the '('}

2
cc.notes
View File

@ -1630,6 +1630,8 @@ If you use #pragma debug 0x0010 to enable stack check debug code, the compiler w
20. When using strict type checks, == or != comparisons between a function pointer and NULL or (void*)0 would cause a spurious error. 20. When using strict type checks, == or != comparisons between a function pointer and NULL or (void*)0 would cause a spurious error.
21. If the operand to sizeof was a compound literal that was not enclosed in parentheses, a spurious error would be reported.
-- Bugs from C 2.1.1 B3 that have been fixed in C 2.2.0 --------------------- -- Bugs from C 2.1.1 B3 that have been fixed in C 2.2.0 ---------------------
1. There were various bugs that could cause incorrect code to be generated in certain cases. Some of these were specific to certain optimization passes, alone or in combination. 1. There were various bugs that could cause incorrect code to be generated in certain cases. Some of these were specific to certain optimization passes, alone or in combination.