add test for large code model

Author: Chen Zheng

llvm/test/CodeGen/PowerPC/aix-tocdata-fastisel.ll

@@ -1,9 +1,8 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
 ; RUN: llc < %s -mtriple=powerpc64-ibm-aix-xcoff -fast-isel -verify-machineinstrs \
 ; RUN:   -code-model=small | FileCheck %s --check-prefix=SMALL
-
-;; FIXME: when toc data for 64 big large code model is supported,
-;; add a run line for large code model too.
+; RUN: llc < %s -mtriple=powerpc64-ibm-aix-xcoff -fast-isel -verify-machineinstrs \
+; RUN:   -code-model=large | FileCheck %s --check-prefix=LARGE
 
 @a = global i32 0, align 4 #0
 
@@ -13,6 +12,13 @@ define signext i32 @foo() #1 {
 ; SMALL-NEXT:    la 3, a[TD](2)
 ; SMALL-NEXT:    lwa 3, 0(3)
 ; SMALL-NEXT:    blr
+;
+; LARGE-LABEL: foo:
+; LARGE:       # %bb.0: # %entry
+; LARGE-NEXT:    addis 3, a[TD]@u(2)
+; LARGE-NEXT:    addi 3, 3, a[TD]@toc@l
+; LARGE-NEXT:    lwa 3, 0(3)
+; LARGE-NEXT:    blr
 entry:
   %0 = load i32, ptr @a, align 4
   ret i32 %0