1 ; RUN: opt < %s -basicaa -globals-aa -gvn -instcombine -S -enable-unsafe-globalsmodref-alias-results | FileCheck %s 2 ; RUN: opt < %s -aa-pipeline=basic-aa,globals-aa -passes="require<globals-aa>,function(gvn,instcombine)" -S -enable-unsafe-globalsmodref-alias-results | FileCheck %s 3 ; 4 ; Note that this test relies on an unsafe feature of GlobalsModRef. While this 5 ; test is correct and safe, GMR's technique for handling this isn't generally. 6 7 @G = internal global i32* null ; <i32**> [#uses=3] 8 9 declare i8* @malloc(i32) 10 define void @test() { 11 %a = call i8* @malloc(i32 4) 12 %A = bitcast i8* %a to i32* 13 store i32* %A, i32** @G 14 ret void 15 } 16 17 define i32 @test1(i32* %P) { 18 ; CHECK: ret i32 0 19 %g1 = load i32*, i32** @G ; <i32*> [#uses=2] 20 %h1 = load i32, i32* %g1 ; <i32> [#uses=1] 21 store i32 123, i32* %P 22 %g2 = load i32*, i32** @G ; <i32*> [#uses=0] 23 %h2 = load i32, i32* %g1 ; <i32> [#uses=1] 24 %X = sub i32 %h1, %h2 ; <i32> [#uses=1] 25 ret i32 %X 26 } 27
