svn commit: r359333 - head/contrib/llvm-project/llvm/lib/Target/PowerPC
Dimitry Andric
dim at FreeBSD.org
Thu Mar 26 17:27:47 UTC 2020
Author: dim
Date: Thu Mar 26 17:27:41 2020
New Revision: 359333
URL: https://svnweb.freebsd.org/changeset/base/359333
Log:
Merge commit f0990e104 from llvm git (by Justin Hibbits):
[PowerPC]: e500 target can't use lwsync, use msync instead
The e500 core has a silicon bug that triggers an illegal instruction
program trap on any sync other than msync. Other cores will typically
ignore illegal sync types, and the documentation even implies that
the 'illegal' bits are ignored.
Address this hardware deficiency by only using msync, like the PPC440.
Differential Revision: https://reviews.llvm.org/D76614
Requested by: jhibbits
MFC after: 6 weeks
X-MFC-With: 358851
Modified:
head/contrib/llvm-project/llvm/lib/Target/PowerPC/PPC.td
Modified: head/contrib/llvm-project/llvm/lib/Target/PowerPC/PPC.td
==============================================================================
--- head/contrib/llvm-project/llvm/lib/Target/PowerPC/PPC.td Thu Mar 26 17:12:55 2020 (r359332)
+++ head/contrib/llvm-project/llvm/lib/Target/PowerPC/PPC.td Thu Mar 26 17:27:41 2020 (r359333)
@@ -442,7 +442,7 @@ def : ProcessorModel<"g5", G5Model,
def : ProcessorModel<"e500", PPCE500Model,
[DirectiveE500,
FeatureICBT, FeatureBookE,
- FeatureISEL, FeatureMFTB, FeatureSPE]>;
+ FeatureISEL, FeatureMFTB, FeatureMSYNC, FeatureSPE]>;
def : ProcessorModel<"e500mc", PPCE500mcModel,
[DirectiveE500mc,
FeatureSTFIWX, FeatureICBT, FeatureBookE,
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