obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 94 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr33870-1.c b/gcc/testsuite/gcc.c-torture/execute/pr33870-1.c
new file mode 100644
index 000000000..af5a40db6
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr33870-1.c
@@ -0,0 +1,94 @@
+extern void abort (void);
+
+typedef struct PgHdr PgHdr;
+typedef unsigned char u8;
+struct PgHdr {
+int y;
+struct {
+ unsigned int pgno;
+ PgHdr *pNextHash, *pPrevHash;
+ PgHdr *pNextFree, *pPrevFree;
+ PgHdr *pNextAll;
+ u8 inJournal;
+ short int nRef;
+ PgHdr *pDirty, *pPrevDirty;
+ unsigned int notUsed;
+} x;
+};
+PgHdr **xx;
+volatile int vx;
+static inline PgHdr *merge_pagelist(PgHdr *pA, PgHdr *pB)
+{
+ PgHdr result;
+ PgHdr *pTail;
+ xx = &result.x.pDirty;
+ pTail = &result;
+ while( pA && pB ){
+   if( pA->x.pgno<pB->x.pgno ){
+     pTail->x.pDirty = pA;
+     pTail = pA;
+     pA = pA->x.pDirty;
+   }else{
+     pTail->x.pDirty = pB;
+     pTail = pB;
+     pB = pB->x.pDirty;
+   }
+   vx = (*xx)->y;
+ }
+ if( pA ){
+   pTail->x.pDirty = pA;
+ }else if( pB ){
+   pTail->x.pDirty = pB;
+ }else{
+   pTail->x.pDirty = 0;
+ }
+ return result.x.pDirty;
+}
+
+PgHdr * __attribute__((noinline)) sort_pagelist(PgHdr *pIn)
+{
+ PgHdr *a[25], *p;
+ int i;
+ __builtin_memset (a, 0, sizeof (a));
+ while( pIn ){
+   p = pIn;
+   pIn = p->x.pDirty;
+   p->x.pDirty = 0;
+   for(i=0; i<25 -1; i++){
+     if( a[i]==0 ){
+       a[i] = p;
+       break;
+     }else{
+       p = merge_pagelist(a[i], p);
+       a[i] = 0;
+       a[i] = 0;
+     }
+   }
+   if( i==25 -1 ){
+     a[i] = merge_pagelist(a[i], p);
+   }
+ }
+ p = a[0];
+ for(i=1; i<25; i++){
+   p = merge_pagelist (p, a[i]);
+ }
+ return p;
+}
+
+int main()
+{
+ PgHdr a[5];
+ PgHdr *p;
+ a[0].x.pgno = 5;
+ a[0].x.pDirty = &a[1];
+ a[1].x.pgno = 4;
+ a[1].x.pDirty = &a[2];
+ a[2].x.pgno = 1;
+ a[2].x.pDirty = &a[3];
+ a[3].x.pgno = 3;
+ a[3].x.pDirty = 0;
+ p = sort_pagelist (&a[0]);
+ if (p->x.pDirty == p)
+   abort ();
+ return 0;
+}