| Dan Gohman | c1be92f | 2010-10-18 18:04:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -globalsmodref-aa -gvn -instcombine -S | \ |
| Reid Spencer | b477f7d | 2007-04-15 09:31:07 +0000 | [diff] [blame] | 2 | ; RUN: grep {ret i32 0} |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 3 | |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 4 | @G = internal global i32* null ; <i32**> [#uses=3] |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 5 | |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 6 | define void @test() { |
| 7 | %A = malloc i32 ; <i32*> [#uses=1] |
| 8 | store i32* %A, i32** @G |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 9 | ret void |
| 10 | } |
| 11 | |
| Tanya Lattner | dcd188d | 2008-02-14 06:56:27 +0000 | [diff] [blame] | 12 | define i32 @test1(i32* %P) { |
| 13 | %g1 = load i32** @G ; <i32*> [#uses=2] |
| 14 | %h1 = load i32* %g1 ; <i32> [#uses=1] |
| 15 | store i32 123, i32* %P |
| 16 | %g2 = load i32** @G ; <i32*> [#uses=0] |
| 17 | %h2 = load i32* %g1 ; <i32> [#uses=1] |
| 18 | %X = sub i32 %h1, %h2 ; <i32> [#uses=1] |
| 19 | ret i32 %X |
| Chris Lattner | b363312 | 2006-10-01 22:35:45 +0000 | [diff] [blame] | 20 | } |