diff options
Diffstat (limited to 'include/llvm/Target')
| -rw-r--r-- | include/llvm/Target/Target.td | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td index be08b9c..f9f30a8 100644 --- a/include/llvm/Target/Target.td +++ b/include/llvm/Target/Target.td @@ -86,6 +86,12 @@ class Register<string n, list<string> altNames = []> { // This is used by the x86-64 and ARM Thumb targets where some registers // require larger instruction encodings. int CostPerUse = 0; + + // CoveredBySubRegs - When this bit is set, the value of this register is + // completely determined by the value of its sub-registers. For example, the + // x86 register AX is covered by its sub-registers AL and AH, but EAX is not + // covered by its sub-register AX. + bit CoveredBySubRegs = 0; } // RegisterWithSubRegs - This can be used to define instances of Register which |