1; RUN: opt < %s -passes=globalopt -S | FileCheck %s 2 3; Test the evaluation of a store and a load via a bitcast, and check 4; that globals are constant folded to the correct value. 5 6; CHECK: @u = dso_local local_unnamed_addr global %union.A { ptr inttoptr (i64 12345 to ptr) }, align 8 7; CHECK: @l = dso_local local_unnamed_addr global i64 12345, align 8 8 9; Test derived from: 10; 11; union A { 12; A(long long ll) : l(ll) {} 13; ptr p; 14; long long l; 15; } u(12345); 16; 17; long long l = u.l; 18 19target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 20target triple = "x86_64-unknown-linux-gnu" 21 22%union.A = type { ptr } 23 24$_ZN1AC2Ex = comdat any 25 26@u = dso_local global %union.A zeroinitializer, align 8 27@l = dso_local global i64 0, align 8 28@llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_test.cpp, ptr null }] 29 30define internal void @__cxx_global_var_init() section ".text.startup" { 31 call void @_ZN1AC2Ex(ptr @u, i64 12345) 32 ret void 33} 34 35define linkonce_odr dso_local void @_ZN1AC2Ex(ptr %this, i64 %ll) unnamed_addr comdat align 2 { 36 store i64 %ll, ptr %this, align 8 37 ret void 38} 39 40define internal void @__cxx_global_var_init.1() section ".text.startup" { 41 %1 = load i64, ptr @u, align 8 42 store i64 %1, ptr @l, align 8 43 ret void 44} 45 46define internal void @_GLOBAL__sub_I_test.cpp() section ".text.startup" { 47 call void @__cxx_global_var_init() 48 call void @__cxx_global_var_init.1() 49 ret void 50} 51