udpate tc

Author: lei137

llvm/test/CodeGen/PowerPC/f128-conv.ll

@@ -1478,7 +1478,7 @@ define half @trunc(fp128 %a) unnamed_addr {
 ; CHECK-P8-NEXT:    bl __trunctfhf2
 ; CHECK-P8-NEXT:    nop
 ; CHECK-P8-NEXT:    clrldi r3, r3, 48
-; CHECK-P8-NEXT:    bl __gnu_h2f_ieee
+; CHECK-P8-NEXT:    bl __extendhfsf2
 ; CHECK-P8-NEXT:    nop
 ; CHECK-P8-NEXT:    addi r1, r1, 32
 ; CHECK-P8-NEXT:    ld r0, 16(r1)