1 ; RUN: opt -S -basicaa -objc-arc -gvn < %s | FileCheck %s 2 3 @x = common global i8* null, align 8 4 5 declare i8* @objc_retain(i8*) 6 7 ; GVN should be able to eliminate this redundant load, with ARC-specific 8 ; alias analysis. 9 10 ; CHECK: @foo 11 ; CHECK-NEXT: entry: 12 ; CHECK-NEXT: %s = load i8** @x 13 ; CHECK-NOT: load 14 ; CHECK: ret i8* %s 15 define i8* @foo(i32 %n) nounwind { 16 entry: 17 %s = load i8** @x 18 %0 = tail call i8* @objc_retain(i8* %s) nounwind 19 %t = load i8** @x 20 ret i8* %s 21 } 22
