RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2025-02-04 03:17:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Ignore multi-instruction patterns. e.g.

Browse Source 
def : Pat<(i8 (trunc GR32:$src)),
          (i8 (EXTRACT_SUBREG (MOV32to32_ GR32:$src), x86_subreg_8bit))>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55875 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-09-07 08:19:51 +00:00
parent b9baf31679
commit 34fc6ceb73
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
utils/TableGen/FastISelEmitter.cpp
View File

@ -259,6 +259,20 @@ void FastISelMap::CollectPatterns(CodeGenDAGPatterns &CGP) {
if (II.OperandList.empty())
continue;
// For now, ignore multi-instruction patterns.
bool MultiInsts = false;
for (unsigned i = 0, e = Dst->getNumChildren(); i != e; ++i) {
TreePatternNode *ChildOp = Dst->getChild(i);
if (ChildOp->isLeaf())
continue;
if (ChildOp->getOperator()->isSubClassOf("Instruction")) {
MultiInsts = true;
break;
}
}
if (MultiInsts)
continue;
// For now, ignore instructions where the first operand is not an
// output register.
const CodeGenRegisterClass *DstRC = 0;