Fix the bug in Linear Scan RA

bcheng0127 · sys_zuul · commit 79dd38abfad5 · 2020-10-30T00:42:28.000-07:00
Change-Id: Ic061869848b316a7526bebc53964e4eb11357079
diff --git a/visa/LinearScanRA.cpp b/visa/LinearScanRA.cpp
@@ -1355,7 +1355,7 @@ void LinearScanRA::setSrcReferences(G4_BB* bb, INST_LIST_ITER inst_it, int srcId
 
             if (lr->isGRFRegAssigned() && dcl->getRegVar()->getPhyReg()->isGreg())
             {
-                lr->setFirstRef(nullptr, 0);
+                lr->setFirstRef(nullptr, 1);
                 setPreAssignedLR(lr, preAssignedLiveIntervals);
             }
             else //Not pre-asssigned, temp

Original file line number	Diff line number	Diff line change
`@@ -1355,7 +1355,7 @@ void LinearScanRA::setSrcReferences(G4_BB* bb, INST_LIST_ITER inst_it, int srcId`
`1355`	`1355`
`1356`	`1356`	`if (lr->isGRFRegAssigned() && dcl->getRegVar()->getPhyReg()->isGreg())`
`1357`	`1357`	`{`
`1358`		`- lr->setFirstRef(nullptr, 0);`
	`1358`	`+ lr->setFirstRef(nullptr, 1);`
`1359`	`1359`	`setPreAssignedLR(lr, preAssignedLiveIntervals);`
`1360`	`1360`	`}`
`1361`	`1361`	`else //Not pre-asssigned, temp`