[Commmitted] Move some testcases to torture from tree-ssa

While writing up some testcases, I noticed some newer testcases
just had "dg-do compile/run" on them with dg-options of either -O1
or -O2. Since it is always better to run them over all optimization
levels I put them in gcc.c-torture/compile or gcc.c-torture/execute.

Committed after testing to make sure the testcases pass.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/pr100278.c: Move to ...
	* gcc.c-torture/compile/pr100278.c: Here.
	Remove dg-do and dg-options.
	* gcc.dg/tree-ssa/pr101189.c: Move to ...
	* gcc.c-torture/compile/pr101189.c: Here.
	Remove dg-do and dg-options.
	* gcc.dg/tree-ssa/pr100453.c: Move to ...
	* gcc.c-torture/execute/pr100453.c: Here.
	Remove dg-do and dg-options.
	* gcc.dg/tree-ssa/pr101335.c: Move to ...
	* gcc.c-torture/execute/pr101335.c: Here
	Remove dg-do and dg-options.

gcc/testsuite/gcc.c-torture/compile/pr100278.c

@@ -1,5 +1,3 @@
-/* { dg-do compile } */
-/* { dg-options "-O2" } */
 
 void a()
 {

gcc/testsuite/gcc.c-torture/compile/pr101189.c

@@ -1,6 +1,4 @@
 /* PR tree-optimization/101189  */
-/* { dg-do compile } */
-/* { dg-options "-O2" } */
 
 static int a, b;
 int main() {

gcc/testsuite/gcc.c-torture/execute/pr100453.c

@@ -1,5 +1,3 @@
-/* { dg-do run } */
-/* { dg-options "-O1" } */
 
 struct a {
   int b : 4;

gcc/testsuite/gcc.c-torture/execute/pr101335.c

@@ -1,5 +1,3 @@
-/* { dg-do run } */
-/* { dg-options "-O2" } */
 
 unsigned a = 0xFFFFFFFF;
 int b;