| ; RUN: opt < %s -passes=globalopt -S | FileCheck %s |
| target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" |
| |
| @G = internal global i32* null ; <i32**> [#uses=4] |
| ; CHECK-NOT: global |
| |
| define void @init() { |
| %malloccall = tail call i8* @malloc(i64 4) ; <i8*> [#uses=1] |
| %P = bitcast i8* %malloccall to i32* ; <i32*> [#uses=1] |
| store i32* %P, i32** @G |
| %GV = load i32*, i32** @G ; <i32*> [#uses=1] |
| store i32 0, i32* %GV |
| ret void |
| } |
| |
| declare noalias i8* @malloc(i64) |
| |
| define i32 @get() { |
| %GV = load i32*, i32** @G ; <i32*> [#uses=1] |
| %V = load i32, i32* %GV ; <i32> [#uses=1] |
| ret i32 %V |
| ; CHECK: ret i32 0 |
| } |
| |
| define void @foo(i64 %Size) nounwind noinline #0 { |
| entry: |
| %0 = load i32*, i32** @G, align 4 |
| ret void |
| } |
| |
| attributes #0 = { null_pointer_is_valid } |
| |