http://llvm.org/bugs/show_bug.cgi?id=20069
Bug ID: 20069
Summary: Malformed loop pragma crashes clang
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 12675
--> http://llvm.org/bugs/attachment.cgi?id=12675&action=edit
crash report
It appears the recently added loop pragmas don't handle certain malformed
pragmas well. The code below (note the double opening parens in the pragma)
causes clang to crash. Just run as 'clang foo.cc'
void loop()
{
#pragma clang loop vectorize(()
while (1) {}
}
It appears that inside of PragmaLoopHintHandler::HandlePragma(), the variable
Value which contains the token within the parens in the loop pragam is not
initialized if the token is not an identifier or numeric constant. Code:
...
PP.Lex(Tok);
Token Value;
if (Tok.is(tok::identifier) || Tok.is(tok::numeric_constant))
Value = Tok;
... Use Value ...
Crash report attached.
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