52 lines
1.5 KiB
LLVM
52 lines
1.5 KiB
LLVM
; RUN: opt < %s -globalopt -S | FileCheck %s
|
|
|
|
; Test the evaluation of a store and a load via a bitcast, and check
|
|
; that globals are constant folded to the correct value.
|
|
|
|
; CHECK: @u = dso_local local_unnamed_addr global %union.A { i8* inttoptr (i64 12345 to i8*) }, align 8
|
|
; CHECK: @l = dso_local local_unnamed_addr global i64 12345, align 8
|
|
|
|
; Test derived from:
|
|
;
|
|
; union A {
|
|
; A(long long ll) : l(ll) {}
|
|
; void *p;
|
|
; long long l;
|
|
; } u(12345);
|
|
;
|
|
; long long l = u.l;
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
%union.A = type { i8* }
|
|
|
|
$_ZN1AC2Ex = comdat any
|
|
|
|
@u = dso_local global %union.A zeroinitializer, align 8
|
|
@l = dso_local global i64 0, align 8
|
|
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_test.cpp, i8* null }]
|
|
|
|
define internal void @__cxx_global_var_init() section ".text.startup" {
|
|
call void @_ZN1AC2Ex(%union.A* @u, i64 12345)
|
|
ret void
|
|
}
|
|
|
|
define linkonce_odr dso_local void @_ZN1AC2Ex(%union.A* %this, i64 %ll) unnamed_addr comdat align 2 {
|
|
%l = bitcast %union.A* %this to i64*
|
|
store i64 %ll, i64* %l, align 8
|
|
ret void
|
|
}
|
|
|
|
define internal void @__cxx_global_var_init.1() section ".text.startup" {
|
|
%1 = load i64, i64* bitcast (%union.A* @u to i64*), align 8
|
|
store i64 %1, i64* @l, align 8
|
|
ret void
|
|
}
|
|
|
|
define internal void @_GLOBAL__sub_I_test.cpp() section ".text.startup" {
|
|
call void @__cxx_global_var_init()
|
|
call void @__cxx_global_var_init.1()
|
|
ret void
|
|
}
|