Index: src/crankshaft/x64/lithium-codegen-x64.cc |
diff --git a/src/crankshaft/x64/lithium-codegen-x64.cc b/src/crankshaft/x64/lithium-codegen-x64.cc |
index 493bfd49f43f7e8b6f50de39c3a30055d3ba6365..70aec0da60bf744ce8cf8036e20df57c79cfa5b0 100644 |
--- a/src/crankshaft/x64/lithium-codegen-x64.cc |
+++ b/src/crankshaft/x64/lithium-codegen-x64.cc |
@@ -3270,6 +3270,17 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) { |
Register tmp = input_reg.is(rax) ? rcx : rax; |
Register tmp2 = tmp.is(rcx) ? rdx : input_reg.is(rcx) ? rdx : rcx; |
+ // Make sure that the context isn't overwritten in the AllocateHeapNumber |
+ // macro below. |
+ if (instr->context()->IsRegister()) { |
+ Register context_reg = ToRegister(instr->context()); |
+ if (tmp.is(context_reg)) { |
+ tmp = rbx; |
+ } else if (tmp2.is(context_reg)) { |
+ tmp2 = rbx; |
+ } |
+ } |
+ |
// Preserve the value of all registers. |
PushSafepointRegistersScope scope(this); |