Reviewers: Toon Verwaest,
Message:
PTAL.
Description:
ia32: Calls to the TranscendentalCacheStub must ensure that esi is set to
something safe.
BUG=v8:2827
Please review this at https://codereview.chromium.org/22863002/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/ia32/lithium-codegen-ia32.cc
Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc
b/src/ia32/lithium-codegen-ia32.cc
index
898918f49e291174227a5aca7d20150e8c4be94d..82dc1f4e778c9aeccc844999be831691ff41ca9e
100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -4092,6 +4092,9 @@ void LCodeGen::DoMathExp(LMathExp* instr) {
void LCodeGen::DoMathTan(LMathTan* instr) {
ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
+ // Set the context register to a GC-safe fake value. Clobbering it is
+ // OK because this instruction is marked as a call.
+ __ Set(esi, Immediate(0));
TranscendentalCacheStub stub(TranscendentalCache::TAN,
TranscendentalCacheStub::UNTAGGED);
CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
@@ -4100,6 +4103,9 @@ void LCodeGen::DoMathTan(LMathTan* instr) {
void LCodeGen::DoMathCos(LMathCos* instr) {
ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
+ // Set the context register to a GC-safe fake value. Clobbering it is
+ // OK because this instruction is marked as a call.
+ __ Set(esi, Immediate(0));
TranscendentalCacheStub stub(TranscendentalCache::COS,
TranscendentalCacheStub::UNTAGGED);
CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
@@ -4108,6 +4114,9 @@ void LCodeGen::DoMathCos(LMathCos* instr) {
void LCodeGen::DoMathSin(LMathSin* instr) {
ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
+ // Set the context register to a GC-safe fake value. Clobbering it is
+ // OK because this instruction is marked as a call.
+ __ Set(esi, Immediate(0));
TranscendentalCacheStub stub(TranscendentalCache::SIN,
TranscendentalCacheStub::UNTAGGED);
CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
--
--
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