Merging r323811:

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r323811 | mstorsjo | 2018-01-30 20:50:58 +0100 (Tue, 30 Jan 2018) | 3 lines

[GlobalISel] Bail out on calls to dllimported functions

Differential Revision: https://reviews.llvm.org/D42568
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_60@323853 91177308-0d34-0410-b5e6-96231b3b80d8

Author: zmodem

lib/CodeGen/GlobalISel/IRTranslator.cpp

@@ -812,6 +812,10 @@ bool IRTranslator::translateCall(const User &U, MachineIRBuilder &MIRBuilder) {
   auto TII = MF->getTarget().getIntrinsicInfo();
   const Function *F = CI.getCalledFunction();
 
+  // FIXME: support Windows dllimport function calls.
+  if (F && F->hasDLLImportStorageClass())
+    return false;
+
   if (CI.isInlineAsm())
     return translateInlineAsm(CI, MIRBuilder);
 

test/CodeGen/AArch64/dllimport.ll

@@ -1,5 +1,6 @@
 ; RUN: llc -mtriple aarch64-unknown-windows-msvc -filetype asm -o - %s | FileCheck %s -check-prefixes=CHECK,DAG-ISEL
 ; RUN: llc -mtriple aarch64-unknown-windows-msvc -fast-isel -filetype asm -o - %s | FileCheck %s -check-prefixes=CHECK,FAST-ISEL
+; RUN: llc -mtriple aarch64-unknown-windows-msvc -O0 -filetype asm -o - %s | FileCheck %s -check-prefixes=CHECK,GLOBAL-ISEL,GLOBAL-ISEL-FALLBACK
 
 @var = external dllimport global i32
 @ext = external global i32
@@ -27,6 +28,8 @@ define i32 @get_ext() {
 ; DAG-ISEL: ldr w0, [x8, ext]
 ; FAST-ISEL: add x8, x8, ext
 ; FAST-ISEL: ldr w0, [x8]
+; GLOBAL-ISEL-FALLBACK: add x8, x8, ext
+; GLOBAL-ISEL-FALLBACK: ldr w0, [x8]
 ; CHECK: ret
 
 define i32* @get_var_pointer() {
@@ -54,4 +57,6 @@ define i32 @call_internal() {
 }
 
 ; CHECK-LABEL: call_internal
-; CHECK: b internal
+; DAG-ISEL: b internal
+; FAST-ISEL: b internal
+; GLOBAL-ISEL: bl internal