1; RUN: opt < %s -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 { i8* inttoptr (i64 12345 to i8*) }, 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; void *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 { i8* } 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, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_test.cpp, i8* null }] 29 30define internal void @__cxx_global_var_init() section ".text.startup" { 31 call void @_ZN1AC2Ex(%union.A* @u, i64 12345) 32 ret void 33} 34 35define linkonce_odr dso_local void @_ZN1AC2Ex(%union.A* %this, i64 %ll) unnamed_addr comdat align 2 { 36 %l = bitcast %union.A* %this to i64* 37 store i64 %ll, i64* %l, align 8 38 ret void 39} 40 41define internal void @__cxx_global_var_init.1() section ".text.startup" { 42 %1 = load i64, i64* bitcast (%union.A* @u to i64*), align 8 43 store i64 %1, i64* @l, align 8 44 ret void 45} 46 47define internal void @_GLOBAL__sub_I_test.cpp() section ".text.startup" { 48 call void @__cxx_global_var_init() 49 call void @__cxx_global_var_init.1() 50 ret void 51} 52