================
@@ -985,6 +985,9 @@ void TargetPassConfig::addISelPrepare() {
if (getOptLevel() != CodeGenOptLevel::None)
addPass(createObjCARCContractPass());
+ if (getOptLevel() == CodeGenOptLevel::None)
----------------
bwendling wrote:
This is how the fast register allocator is selected (see around line 1173). I'm
*not* interested in the value of `OptimizeRegAlloc` (the `-regalloc` flag)
because that's hidden for a reason. :-) But remember that this isn't an
"optimization" in the normal sense of the word---that the middle-end does its
thing. As far as I know, the `OptNone` attribute doesn't change the activities
of the back-end at that level (i.e., changing the register allocator on the
fly).
https://github.com/llvm/llvm-project/pull/92040
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