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Unified Diff: src/x64/code-stubs-x64.cc

Issue 11293246: Reverting r12937. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 1 month ago
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Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 9c9a266ac53cbef1eed6ac7a4dc238412ef9ffe9..a8e52e99d306d0cedb44ab9f4ef74eedd10d85c0 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -4765,6 +4765,11 @@ void StringAddStub::Generate(MacroAssembler* masm) {
// r9: second instance type.
__ testb(rcx, Immediate(kAsciiDataHintMask));
__ j(not_zero, &ascii_data);
+ __ xor_(r8, r9);
+ STATIC_ASSERT(kOneByteStringTag != 0 && kAsciiDataHintTag != 0);
+ __ andb(r8, Immediate(kOneByteStringTag | kAsciiDataHintTag));
+ __ cmpb(r8, Immediate(kOneByteStringTag | kAsciiDataHintTag));
+ __ j(equal, &ascii_data);
// Allocate a two byte cons string.
__ AllocateTwoByteConsString(rcx, rdi, no_reg, &call_runtime);
__ jmp(&allocated);
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