[indvars] Rewriter can invalidate iterator and crash #954
Description
| Bugzilla Link | 582 |
| Resolution | FIXED |
| Resolved on | Feb 22, 2010 12:45 |
| Version | 1.3 |
| OS | All |
| Attachments | LLVM intermediate .s file for this test case |
| Reporter | LLVM Bugzilla Contributor |
Extended Description
I've tried reducing this test case as far as possible, but it appears to require
all of the lines below.
LLVM 1.5 release
gccas: /home/brturn/llvm/llvm/include/llvm/ADT/ilist:120: typename
bidirectional_iterator<NodeTy, ptrdiff_t>::reference
llvm::ilist_iterator::operator*() const [with NodeTy =
llvm::Instruction]: Assertion `Traits::getNext(NodePtr) != 0 && "Dereferencing
end()!"' failed.
/*
// --- RANDOMLY GENERATED PROGRAM ---
// Program Generator by Bryan Turner ([email protected])
*/
#include <stdio.h>
unsigned long context = 0;
unsigned long DEPTH = 0;
void DumbHash( unsigned long value, unsigned int len )
{
context += value;
context ^= 0xA50F5AF0;
printf( "%d\n", context );
}
/* --- GLOBAL VARIABLES --- */
char g_45534591 = 0x4B;
/* --- FORWARD DECLARATIONS --- */
int func_47880058( char l_30575406, char l_86920434 );
/* --- FUNCTIONS --- /
/ ------------------------------------------ */
int func_47880058( char l_30575406, char l_86920434 )
{
char l_09369994 = 0x8F;
if ( DEPTH < 5 ) { DEPTH++; func_47880058( g_45534591, l_30575406 ) ; DEPTH--; }
return l_09369994;
}
/* --- MAIN --- /
/ ------------------------------------------ */
int main( )
{
unsigned char l_59025022 = 0xE3;
char l_14237116 = 0xD2;
l_59025022 = l_59025022;
for ( int i=0; i<100; i++ )
{
unsigned short l_61607339 = 0x3A37;
for ( int i=0; i<100; i++ )
{
char l_06790138 = 0xBD;
l_59025022 = l_14237116;
func_47880058( l_59025022, l_06790138 ) ;
DumbHash( l_06790138, 1 );
}
if ( ( 0x3828ECC6 & 0x3111 ) )
{
short l_96478320 = 0xC140;
unsigned short l_40278093 = 0x9CAB;
if ( l_14237116 )
{
l_14237116 = l_61607339;
DumbHash( g_45534591, 1 );
}
}
DumbHash( l_59025022, 1 );
}
DumbHash( l_59025022, 1 );
}