[llvm] b58f91a - Set the default value for MaxAtomicSizeInBitsSupported to 0.

[James Y Knight via llvm-commits]

Author: James Y Knight
Date: 2024-01-11T18:01:46-05:00
New Revision: b58f91a31b288a7078e3b0330bd92bb14f3649de

URL: https://github.com/llvm/llvm-project/commit/b58f91a31b288a7078e3b0330bd92bb14f3649de
DIFF: https://github.com/llvm/llvm-project/commit/b58f91a31b288a7078e3b0330bd92bb14f3649de.diff

LOG: Set the default value for MaxAtomicSizeInBitsSupported to 0.

This was planned since its introduction, but wasn't rolled out for a
little bit longer than intended (ahem...8 years).

All in-tree targets have now been adjusted to call
setMaxAtomicSizeInBitsSupported explicitly where required, so this
should be a no-op. The docs in docs/Atomics.rst already claimed the
default was 0, so that doesn't need updating.

Added: 
    

Modified: 
    llvm/lib/CodeGen/TargetLoweringBase.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp
index e92e3cd043918f..7dffd8d4f2b28e 100644
--- a/llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -752,9 +752,7 @@ TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm) : TM(tm) {
   GatherAllAliasesMaxDepth = 18;
   IsStrictFPEnabled = DisableStrictNodeMutation;
   MaxBytesForAlignment = 0;
-  // TODO: the default will be switched to 0 in the next commit, along
-  // with the Target-specific changes necessary.
-  MaxAtomicSizeInBitsSupported = 1024;
+  MaxAtomicSizeInBitsSupported = 0;
 
   // Assume that even with libcalls, no target supports wider than 128 bit
   // division.