[llvm] [AArch64] Disable by default MachineSink sink-and-fold (PR #70101)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-aarch64

Author: Momchil Velikov (momchil-velikov)

<details>
<summary>Changes</summary>

There is a report about a large compile time regression in V8 when generating debug info.

---
Full diff: https://github.com/llvm/llvm-project/pull/70101.diff


1 Files Affected:

- (modified) llvm/lib/Target/AArch64/AArch64TargetMachine.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
index fcc30a7cfceaf47..3d818c76bd4b7d7 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
@@ -200,7 +200,7 @@ static cl::opt<bool> EnableGISelLoadStoreOptPostLegal(
 static cl::opt<bool>
     EnableSinkFold("aarch64-enable-sink-fold",
                    cl::desc("Enable sinking and folding of instruction copies"),
-                   cl::init(true), cl::Hidden);
+                   cl::init(false), cl::Hidden);
 
 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Target() {
   // Register the target.

``````````

</details>


https://github.com/llvm/llvm-project/pull/70101