[Sparc][Leon] Errata fixes for various errata in different versions of the Leon variants of the Sparc 32 bit processor.
The nature of the errata are listed in the comments preceding the errata fix passes. Relevant unit tests are implemented for each of these.
These changes update older versions of these errata fixes with improvements to code and unit tests.
Differential Revision: https://reviews.llvm.org/D21960
llvm-svn: 278489
diff --git a/llvm/lib/Target/Sparc/LeonFeatures.td b/llvm/lib/Target/Sparc/LeonFeatures.td
index 63f8b33..3d1bdbc 100755
--- a/llvm/lib/Target/Sparc/LeonFeatures.td
+++ b/llvm/lib/Target/Sparc/LeonFeatures.td
@@ -78,14 +78,17 @@
"every single-cycle load instruction when the next "
"instruction is another load/store instruction">;
-def FlushCacheLineSWAP
- : SubtargetFeature<"flshcachelineswap", "FlushCacheLineSWAP", "true",
- "LEON3 erratum fix: Flush cache line containing the "
- "lock before performing any of the atomic instructions "
- "SWAP and LDSTUB">;
-
def InsertNOPsLoadStore
: SubtargetFeature<"insertnopsloadstore", "InsertNOPsLoadStore", "true",
"LEON3 erratum fix: Insert NOPs between "
"single-precision loads and the store, so the number of "
"instructions between is 4">;
+
+def FillDataCache : SubtargetFeature<"filldatacache", "FillDataCache", "true",
+ "LEON2 erratum fix: Ensure data cache is "
+ "filled so that cache misses do not "
+ "happen later in program execution.">;
+
+def RestoreExecAddress
+ : SubtargetFeature<"restexecaddr", "RestoreExecAddress", "true",
+ "LEON2 erratum fix: Restore execution address.">;