Mercurial > hg > graal-jvmci-8
diff src/share/vm/opto/parse1.cpp @ 14452:c6d7e7406136
8029101: PPC64 (part 211): ordering of Independent Reads of Independent Writes
Reviewed-by: dholmes, kvn
Contributed-by: martin.doerr@sap.com
author | goetz |
---|---|
date | Thu, 16 Jan 2014 14:25:51 +0100 |
parents | 2113136690bc |
children | abec000618bf |
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--- a/src/share/vm/opto/parse1.cpp Tue Jan 07 17:24:59 2014 +0100 +++ b/src/share/vm/opto/parse1.cpp Thu Jan 16 14:25:51 2014 +0100 @@ -390,6 +390,7 @@ _expected_uses = expected_uses; _depth = 1 + (caller->has_method() ? caller->depth() : 0); _wrote_final = false; + _wrote_volatile = false; _alloc_with_final = NULL; _entry_bci = InvocationEntryBci; _tf = NULL; @@ -907,7 +908,13 @@ Node* iophi = _exits.i_o(); _exits.set_i_o(gvn().transform(iophi)); - if (wrote_final()) { + // On PPC64, also add MemBarRelease for constructors which write + // volatile fields. As support_IRIW_for_not_multiple_copy_atomic_cpu + // is set on PPC64, no sync instruction is issued after volatile + // stores. We want to quarantee the same behaviour as on platforms + // with total store order, although this is not required by the Java + // memory model. So as with finals, we add a barrier here. + if (wrote_final() PPC64_ONLY(|| (wrote_volatile() && method()->is_initializer()))) { // This method (which must be a constructor by the rules of Java) // wrote a final. The effects of all initializations must be // committed to memory before any code after the constructor