diff options
Diffstat (limited to 'compiler/jni/quick/calling_convention.h')
| -rw-r--r-- | compiler/jni/quick/calling_convention.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/compiler/jni/quick/calling_convention.h b/compiler/jni/quick/calling_convention.h index 21336edb44..b8b4cc14b1 100644 --- a/compiler/jni/quick/calling_convention.h +++ b/compiler/jni/quick/calling_convention.h @@ -324,9 +324,11 @@ class JniCallingConvention : public CallingConvention { virtual ArrayRef<const ManagedRegister> CalleeSaveRegisters() const = 0; // Subset of core callee save registers that can be used for arbitrary purposes after - // constructing the JNI transition frame. These should be managed callee-saves as well. + // constructing the JNI transition frame. These should be both managed and native callee-saves. // These should not include special purpose registers such as thread register. - // JNI compiler currently requires at least 3 callee save scratch registers. + // JNI compiler currently requires at least 4 callee save scratch registers, except for x86 + // where we have only 3 such registers but all args are passed on stack, so the method register + // is never clobbered by argument moves and does not need to be preserved elsewhere. virtual ArrayRef<const ManagedRegister> CalleeSaveScratchRegisters() const = 0; // Subset of core argument registers that can be used for arbitrary purposes after |