| Bill Wendling | 75920ad | 2012-04-24 10:45:44 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -globalsmodref-aa -gvn -instcombine -S | FileCheck %s |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 2 | |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 3 | @G = internal global i32* null ; <i32**> [#uses=3] |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 4 | |
| Chris Lattner | 26b0000 | 2011-06-17 03:14:27 +0000 | [diff] [blame] | 5 | declare i8* @malloc(i32) |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 6 | define void @test() { |
| Chris Lattner | 26b0000 | 2011-06-17 03:14:27 +0000 | [diff] [blame] | 7 | %a = call i8* @malloc(i32 4) |
| 8 | %A = bitcast i8* %a to i32* |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 9 | store i32* %A, i32** @G |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 10 | ret void |
| 11 | } |
| 12 | |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 13 | define i32 @test1(i32* %P) { |
| Bill Wendling | 75920ad | 2012-04-24 10:45:44 +0000 | [diff] [blame] | 14 | ; CHECK: ret i32 0 |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 15 | %g1 = load i32** @G ; <i32*> [#uses=2] |
| 16 | %h1 = load i32* %g1 ; <i32> [#uses=1] |
| 17 | store i32 123, i32* %P |
| 18 | %g2 = load i32** @G ; <i32*> [#uses=0] |
| 19 | %h2 = load i32* %g1 ; <i32> [#uses=1] |
| 20 | %X = sub i32 %h1, %h2 ; <i32> [#uses=1] |
| 21 | ret i32 %X |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 22 | } |