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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25017 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/Target/Target.td b/lib/Target/Target.td
index f2b98ad..4622fe4 100644
--- a/lib/Target/Target.td
+++ b/lib/Target/Target.td
@@ -171,6 +171,7 @@ class Instruction {
   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. 
 }