[PATCH] D122377: [PowerPC][Linux] Support 16-byte lock free atomics on pwr8 and up

[Jinsong Ji via Phabricator via cfe-commits]

jsji added inline comments.


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Comment at: clang/test/CodeGen/PowerPC/atomic-alignment.c:7
+// RUN:   -emit-llvm -o - %s | FileCheck %s --check-prefixes=PPC,PPC64-PWR8
 // RUN: %clang_cc1 -verify -triple powerpc64-unknown-aix -emit-llvm -o - %s | \
 // RUN:   FileCheck %s --check-prefixes=PPC,PPC64
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How about AIX pwr8?


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Comment at: llvm/lib/Target/PowerPC/PPCISelLowering.cpp:126
     "ppc-quadword-atomics",
-    cl::desc("enable quadword lock-free atomic operations"), cl::init(false),
+    cl::desc("enable quadword lock-free atomic operations"), cl::init(true),
     cl::Hidden);
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So we enable it by default , *EVEN* on AIX?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122377/new/

https://reviews.llvm.org/D122377