// Sparc manual specifies its instructions in the format [31..0] (big), while
// PowerPC specifies them using the format [0..31] (little).
bit isLittleEndianEncoding = 0;
+
+ // The instruction properties mayLoad, mayStore, and hasSideEffects are unset
+ // by default, and TableGen will infer their value from the instruction
+ // pattern when possible.
+ //
+ // Normally, TableGen will issue an error it it can't infer the value of a
+ // property that hasn't been set explicitly. When guessInstructionProperties
+ // is set, it will guess a safe value instead.
+ //
+ // This option is a temporary migration help. It will go away.
+ bit guessInstructionProperties = 1;
}
// Standard Pseudo Instructions.
return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
}
+/// guessInstructionProperties - Return true if it's OK to guess instruction
+/// properties instead of raising an error.
+///
+/// This is configurable as a temporary migration aid. It will eventually be
+/// permanently false.
+bool CodeGenTarget::guessInstructionProperties() const {
+ return getInstructionSet()->getValueAsBit("guessInstructionProperties");
+}
+
//===----------------------------------------------------------------------===//
// ComplexPattern implementation
//
///
bool isLittleEndianEncoding() const;
+ /// guessInstructionProperties - should we just guess unset instruction
+ /// properties?
+ bool guessInstructionProperties() const;
+
private:
void ComputeInstrsByEnum() const;
};