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https://github.com/c64scene-ar/llvm-6502.git
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682e019983
This completes the handling for DLL import storage symbols when lowering instructions. A DLL import storage symbol must have an additional load performed prior to use. This is applicable to variables and functions. This is particularly important for non-function symbols as it is possible to handle function references by emitting a thunk which performs the translation from the unprefixed __imp_ symbol to the proper symbol (although, this is a non-optimal lowering). For a variable symbol, no such thunk can be accommodated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212431 91177308-0d34-0410-b5e6-96231b3b80d8
62 lines
1.3 KiB
LLVM
62 lines
1.3 KiB
LLVM
; RUN: llc -mtriple thumbv7-windows -filetype asm -o - %s | FileCheck %s
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; ModuleID = 'dllimport.c'
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@var = external dllimport global i32
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@ext = external global i32
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declare dllimport arm_aapcs_vfpcc i32 @external()
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declare arm_aapcs_vfpcc i32 @internal()
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define arm_aapcs_vfpcc i32 @get_var() {
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%1 = load i32* @var, align 4
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ret i32 %1
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}
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; CHECK-LABEL: get_var
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; CHECK: movw r0, :lower16:__imp_var
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; CHECK: movt r0, :upper16:__imp_var
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; CHECK: ldr r0, [r0]
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; CHECK: ldr r0, [r0]
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; CHECK: bx lr
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define arm_aapcs_vfpcc i32 @get_ext() {
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%1 = load i32* @ext, align 4
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ret i32 %1
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}
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; CHECK-LABEL: get_ext
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; CHECK: movw r0, :lower16:ext
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; CHECK: movt r0, :upper16:ext
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; CHECK: ldr r0, [r0]
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; CHECK: bx lr
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define arm_aapcs_vfpcc i32* @get_var_pointer() {
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ret i32* @var
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}
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; CHECK-LABEL: get_var_pointer
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; CHECK: movw r0, :lower16:__imp_var
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; CHECK: movt r0, :upper16:__imp_var
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; CHECK: ldr r0, [r0]
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; CHECK: bx lr
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define arm_aapcs_vfpcc i32 @call_external() {
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%call = tail call arm_aapcs_vfpcc i32 @external()
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ret i32 %call
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}
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; CHECK-LABEL: call_external
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; CHECK: movw r0, :lower16:__imp_external
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; CHECK: movt r0, :upper16:__imp_external
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; CHECK: ldr r0, [r0]
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; CHECK: bx r0
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define arm_aapcs_vfpcc i32 @call_internal() {
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%call = tail call arm_aapcs_vfpcc i32 @internal()
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ret i32 %call
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}
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; CHECK-LABEL: call_internal
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; CHECK: b internal
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