Index: gcc/combine.c
===================================================================
--- gcc/combine.c	(revision 214413)
+++ gcc/combine.c	(working copy)
@@ -13499,7 +13499,38 @@ distribute_notes (rtx notes, rtx_insn *from_insn,
 		       || rtx_equal_p (XEXP (note, 0), elim_i1)
 		       || rtx_equal_p (XEXP (note, 0), elim_i0))
 		break;
-	      tem_insn = i3;
+
+	      /* See PR62151.
+		 It's possible to have below situation:
+		   i0: r1 <- const_0
+		   i1: r2 <- r1 op_1 const_1
+		       REG_DEAD r1
+		   i2: r1 <- r2 op_2 const_2
+		       REG_DEAD r2
+		   i3: r3 <- r1
+		   i4: r4 <- r1
+
+		 It is transformed into below code before distributing
+		 the REG_DEAD note in i1:
+		   i0: NOTE_INSN_DELETED
+		   i1: NOTE_INSN_DELETED
+		   i2: r1 <- const_combined
+		   i3: r3 <- const_combined
+		   i4: r4 <- r1
+
+		 We need to check if i2 immediately modifies r1 otherwise
+		 i2 would be deleted by below code when distributing
+		 REG_DEAD note, leaving r1 in i4 uninitialied.
+
+		 We set TEM_INSN to i2 for this case indicating that we
+		 need to find right place for distribution from i2.
+		 */
+	      if (from_insn && i2
+		  && from_insn != i2 && from_insn != i3
+		  && reg_set_p (XEXP (note, 0), PATTERN (i2)))
+		tem_insn = i2;
+	      else
+		tem_insn = i3;
 	    }
 
 	  if (place == 0)