| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -globalopt -S | FileCheck %s |
| 2 | 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" |
| 3 | |
| 4 | @G = internal global i32* null ; <i32**> [#uses=3] |
| 5 | ; CHECK: global |
| 6 | |
| 7 | define void @init() #0 { |
| 8 | ; CHECK-LABEL: @init( |
| 9 | ; CHECK: store |
| 10 | ; CHECK: load |
| 11 | %malloccall = tail call i8* @malloc(i64 4) ; <i8*> [#uses=1] |
| 12 | %P = bitcast i8* %malloccall to i32* ; <i32*> [#uses=1] |
| 13 | store i32* %P, i32** @G |
| 14 | %GV = load i32*, i32** @G ; <i32*> [#uses=1] |
| 15 | store i32 0, i32* %GV |
| 16 | ret void |
| 17 | } |
| 18 | |
| 19 | declare noalias i8* @malloc(i64) |
| 20 | |
| 21 | define i32 @get() #0 { |
| 22 | ; CHECK-LABEL: @get( |
| 23 | ; CHECK: load i32*, i32** @G |
| 24 | ; CHECK-NEXT: load i32, i32* %GV |
| 25 | %GV = load i32*, i32** @G ; <i32*> [#uses=1] |
| 26 | %V = load i32, i32* %GV ; <i32> [#uses=1] |
| 27 | ret i32 %V |
| 28 | ; CHECK: ret i32 %V |
| 29 | } |
| 30 | |
| 31 | attributes #0 = { "null-pointer-is-valid"="true" } |