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Add CodeGenTarget::guessInstructionProperties.

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Currently, TableGen just guesses instruction properties when it can't
infer them form patterns.

This adds a guessInstructionProperties flag to the instruction set
definition that will be used to disable guessing. The flag is intended
as a migration aid. It will be removed again when no more targets need
their properties guessed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162460 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-08-23 19:34:41 +00:00
parent 55f1ef0010
commit f104bf65b9
3 changed files with 24 additions and 0 deletions
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9
utils/TableGen/CodeGenTarget.cpp
View File

@@ -334,6 +334,15 @@ bool CodeGenTarget::isLittleEndianEncoding() const {
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
//

4
utils/TableGen/CodeGenTarget.h
View File

@@ -177,6 +177,10 @@ public:
///
bool isLittleEndianEncoding() const;
/// guessInstructionProperties - should we just guess unset instruction
/// properties?
bool guessInstructionProperties() const;
private:
void ComputeInstrsByEnum() const;
};