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