[llvm-commits] CVS: llvm/lib/Target/Target.td

[Evan Cheng]

Changes in directory llvm/lib/Target:

Target.td updated: 1.66 -> 1.67
---
Log message:

Added field noResults to Instruction.
Currently tblgen cannot tell which operands in the operand list are results so
it assumes the first one is a result. This is bad. Ideally we would fix this
by separating results from inputs, e.g. (res R32:$dst),
(ops R32:$src1, R32:$src2). But that's a more distruptive change. Adding
'let noResults = 1' is the workaround to tell tblgen that the instruction does
not produces a result. It works for now since tblgen does not support
instructions which produce multiple results.


---
Diffs of the changes:  (+1 -0)

 Target.td |    1 +
 1 files changed, 1 insertion(+)


Index: llvm/lib/Target/Target.td
diff -u llvm/lib/Target/Target.td:1.66 llvm/lib/Target/Target.td:1.67
--- llvm/lib/Target/Target.td:1.66	Fri Dec 23 16:14:32 2005
+++ llvm/lib/Target/Target.td	Mon Dec 26 03:11:44 2005
@@ -171,6 +171,7 @@
   bit hasCtrlDep   = 0;     // Does this instruction r/w ctrl-flow chains?
   bit hasInFlag    = 0;     // Does this instruction read a flag operand?
   bit hasOutFlag   = 0;     // Does this instruction write a flag operand?
+  bit noResults    = 0;     // Does this instruction produce no results?
   
   InstrItinClass Itinerary; // Execution steps used for scheduling. 
 }