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Unified Diff: runtime/vm/intermediate_language_arm64.cc

Issue 392343002: Cleanup of class id loading sequences. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 6 years, 5 months ago
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Index: runtime/vm/intermediate_language_arm64.cc
===================================================================
--- runtime/vm/intermediate_language_arm64.cc (revision 38317)
+++ runtime/vm/intermediate_language_arm64.cc (working copy)
@@ -907,7 +907,13 @@
void LoadClassIdInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
const Register object = locs()->in(0).reg();
const Register result = locs()->out(0).reg();
- __ LoadTaggedClassIdMayBeSmi(result, object);
+ static const intptr_t kSmiCidSource = kSmiCid << RawObject::kClassIdTagPos;
+
+ __ LoadImmediate(TMP, reinterpret_cast<int64_t>(&kSmiCidSource) + 1, PP);
+ __ tsti(object, kSmiTagMask);
+ __ csel(TMP, TMP, object, EQ);
+ __ LoadClassId(result, TMP, PP);
+ __ SmiTag(result);
}
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