From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Sat, 5 Jul 2014 20:10:05 +0000 (+0000)
Subject: CodeGen: add support for a few MSVC ARM intrinsics
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f5933dae1f065a68514f9e85e69102597b959992;p=clang

CodeGen: add support for a few MSVC ARM intrinsics

This adds support for simple MSVC compatibility mode intrinsics.  These
intrinsics are simple in that they are either directly passed through to the
annotated MSBuiltin intrinsic or they mirror existing GCC builtins.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212378 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/BuiltinsARM.def b/include/clang/Basic/BuiltinsARM.def
index a423b75393..d1cf9a76fb 100644
--- a/include/clang/Basic/BuiltinsARM.def
+++ b/include/clang/Basic/BuiltinsARM.def
@@ -86,5 +86,14 @@ LANGBUILTIN(__wfi, "v", "", ALL_MS_LANGUAGES)
 LANGBUILTIN(__sev, "v", "", ALL_MS_LANGUAGES)
 LANGBUILTIN(__sevl, "v", "", ALL_MS_LANGUAGES)
 
+LANGBUILTIN(__dmb, "vUi", "nc", ALL_MS_LANGUAGES)
+LANGBUILTIN(__dsb, "vUi", "nc", ALL_MS_LANGUAGES)
+LANGBUILTIN(__isb, "vUi", "nc", ALL_MS_LANGUAGES)
+LANGBUILTIN(__ldrexd, "WiCDWi*", "", ALL_MS_LANGUAGES)
+LANGBUILTIN(_MoveFromCoprocessor, "UiUiUiUiUiUi", "", ALL_MS_LANGUAGES)
+LANGBUILTIN(_MoveFromCoprocessor2, "UiUiUiUiUiUi", "", ALL_MS_LANGUAGES)
+LANGBUILTIN(_MoveToCoprocessor, "vUiUiUiUiUiUi", "", ALL_MS_LANGUAGES)
+LANGBUILTIN(_MoveToCoprocessor2, "vUiUiUiUiUiUi", "", ALL_MS_LANGUAGES)
+
 #undef BUILTIN
 #undef LANGBUILTIN
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 38707122a5..ded75c192a 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -3087,10 +3087,21 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
   if (BuiltinID == ARM::BI__builtin_arm_ldrexd ||
       ((BuiltinID == ARM::BI__builtin_arm_ldrex ||
         BuiltinID == ARM::BI__builtin_arm_ldaex) &&
-       getContext().getTypeSize(E->getType()) == 64)) {
-    Function *F = CGM.getIntrinsic(BuiltinID == ARM::BI__builtin_arm_ldaex
-                                       ? Intrinsic::arm_ldaexd
-                                       : Intrinsic::arm_ldrexd);
+       getContext().getTypeSize(E->getType()) == 64) ||
+      BuiltinID == ARM::BI__ldrexd) {
+    Function *F;
+
+    switch (BuiltinID) {
+    default: llvm_unreachable("unexpected builtin");
+    case ARM::BI__builtin_arm_ldaex:
+      F = CGM.getIntrinsic(Intrinsic::arm_ldaexd);
+      break;
+    case ARM::BI__builtin_arm_ldrexd:
+    case ARM::BI__builtin_arm_ldrex:
+    case ARM::BI__ldrexd:
+      F = CGM.getIntrinsic(Intrinsic::arm_ldrexd);
+      break;
+    }
 
     Value *LdPtr = EmitScalarExpr(E->getArg(0));
     Value *Val = Builder.CreateCall(F, Builder.CreateBitCast(LdPtr, Int8PtrTy),
diff --git a/test/CodeGen/arm-microsoft-intrinsics.c b/test/CodeGen/arm-microsoft-intrinsics.c
new file mode 100644
index 0000000000..5f19e5e7c8
--- /dev/null
+++ b/test/CodeGen/arm-microsoft-intrinsics.c
@@ -0,0 +1,63 @@
+// RUN: %clang_cc1 -triple thumbv7-windows -fms-compatibility -emit-llvm -o - %s \
+// RUN:    | FileCheck %s -check-prefix CHECK-MSVC
+
+// RUN: not %clang_cc1 -triple armv7-eabi -Werror -S -o /dev/null %s 2>&1 \
+// RUN:    | FileCheck %s -check-prefix CHECK-EABI
+
+void check__dmb(void) {
+  __dmb(0);
+}
+
+// CHECK-MSVC: @llvm.arm.dmb(i32 0)
+// CHECK-EABI: error: implicit declaration of function '__dmb'
+
+void check__dsb(void) {
+  __dsb(0);
+}
+
+// CHECK-MSVC: @llvm.arm.dsb(i32 0)
+// CHECK-EABI: error: implicit declaration of function '__dsb'
+
+void check__isb(void) {
+  __isb(0);
+}
+
+// CHECK-MSVC: @llvm.arm.isb(i32 0)
+// CHECK-EABI: error: implicit declaration of function '__isb'
+
+__INT64_TYPE__ check__ldrexd(void) {
+  __INT64_TYPE__ i64;
+  return __ldrexd(&i64);
+}
+
+// CHECK-MSVC: @llvm.arm.ldrexd(i8* {{.*}})
+// CHECK-EABI: error: implicit declaration of function '__ldrexd'
+
+unsigned int check_MoveFromCoprocessor(void) {
+  return _MoveFromCoprocessor(0, 0, 0, 0, 0);
+}
+
+// CHECK-MSVC: @llvm.arm.mrc(i32 0, i32 0, i32 0, i32 0, i32 0)
+// CHECK-EABI: error: implicit declaration of function '_MoveFromCoprocessor'
+
+unsigned int check_MoveFromCoprocessor2(void) {
+  return _MoveFromCoprocessor2(0, 0, 0, 0, 0);
+}
+
+// CHECK-MSVC: @llvm.arm.mrc2(i32 0, i32 0, i32 0, i32 0, i32 0)
+// CHECK-EABI: error: implicit declaration of function '_MoveFromCoprocessor2'
+
+void check_MoveToCoprocessor(void) {
+  _MoveToCoprocessor(0, 0, 0, 0, 0, 0);
+}
+
+// CHECK-MSVC: @llvm.arm.mcr(i32 0, i32 0, i32 0, i32 0, i32 0, i32 0)
+// CHECK-EABI: error: implicit declaration of function '_MoveToCoprocessor'
+
+void check_MoveToCoprocessor2(void) {
+  _MoveToCoprocessor2(0, 0, 0, 0, 0, 0);
+}
+
+// CHECK-MSVC: @llvm.arm.mcr2(i32 0, i32 0, i32 0, i32 0, i32 0, i32 0)
+// CHECK-EABI: error: implicit declaration of function '_MoveToCoprocessor2'
+