Displaying 3 results from an estimated 3 matches for "isonlynullcomparedandfreed".
2010 Jul 13
1
[LLVMdev] Promoting malloc to alloca
...after the malloc.
Take a look at:
Instruction *InstCombiner::visitMalloc(Instruction &MI) {
// If we have a malloc call which is only used in any amount of comparisons
// to null and free calls, delete the calls and replace the comparisons with
// true or false as appropriate.
if (IsOnlyNullComparedAndFreed(MI)) {
...
Ciao,
Duncan.
2010 Jul 13
0
[LLVMdev] Promoting malloc to alloca
Duncan Sands wrote:
> Hi Nick,
>
>> The attribute you're looking for, "delete if result is unused" doesn't
>> exist in LLVM. I've considered it in the past, but the truth is that
>> most of the time I want to eliminate dead malloc's, they *do* have a
>> use: the matching free. At some point I expect I'm going to teach LLVM
>> to
2010 Jul 13
2
[LLVMdev] Promoting malloc to alloca
Hi Nick,
> The attribute you're looking for, "delete if result is unused" doesn't
> exist in LLVM. I've considered it in the past, but the truth is that
> most of the time I want to eliminate dead malloc's, they *do* have a
> use: the matching free. At some point I expect I'm going to teach LLVM
> to remove dead malloc+free / new+delete /