diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/tree-ssa/volatile2.C')
-rw-r--r-- | gcc/testsuite/g++.dg/tree-ssa/volatile2.C | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/tree-ssa/volatile2.C b/gcc/testsuite/g++.dg/tree-ssa/volatile2.C new file mode 100644 index 00000000000..bec60442477 --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/volatile2.C @@ -0,0 +1,20 @@ +// PR c++/84686 +// { dg-additional-options -fdump-tree-gimple } +// { dg-final { scan-tree-dump-times "= i" 10 "gimple" } } + +volatile int i; + +int main() +{ + i; //evaluated (a load is performed) + (i); //unevaluated => the load shall be performed + + (void)i; //evaluated (a load is performed) + (void)(i); //unevaluated => the load shall be performed + + (void)i; //evaluated (a load is performed) + (void)(i); //unevaluated => the load shall be performed + + (i,i); // the two subexpression are evaluated + ((i),(i)); // no evaluation, => two loads shall happen +} |