r360082 - [AArch64] Add __builtin_sponentry, for calling setjmp in MinGW

[Martin Storsjo via cfe-commits]

Author: mstorsjo
Date: Mon May  6 14:19:07 2019
New Revision: 360082

URL: http://llvm.org/viewvc/llvm-project?rev=360082&view=rev
Log:
[AArch64] Add __builtin_sponentry, for calling setjmp in MinGW

In MinGW, setjmp isn't expanded as a builtin in the compiler (like it
is for MSVC), but manually hooked up as calls to the right underlying
functions in headers. Using the actual CRT's real setjmp/longjmp
functions requires this intrinsic. (Currently this is worked around by
using MinGW specific reimplementations of setjmp/longjmp on aarch64.)

Differential Revision: https://reviews.llvm.org/D61592

Added:
    cfe/trunk/test/CodeGen/builtin-sponentry.c
Modified:
    cfe/trunk/include/clang/Basic/BuiltinsAArch64.def
    cfe/trunk/lib/CodeGen/CGBuiltin.cpp

Modified: cfe/trunk/include/clang/Basic/BuiltinsAArch64.def
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsAArch64.def?rev=360082&r1=360081&r2=360082&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/BuiltinsAArch64.def (original)
+++ cfe/trunk/include/clang/Basic/BuiltinsAArch64.def Mon May  6 14:19:07 2019
@@ -86,6 +86,9 @@ LANGBUILTIN(__wfi,   "v", "",   ALL_MS_L
 LANGBUILTIN(__sev,   "v", "",   ALL_MS_LANGUAGES)
 LANGBUILTIN(__sevl,  "v", "",   ALL_MS_LANGUAGES)
 
+// Misc
+BUILTIN(__builtin_sponentry, "v*", "c")
+
 TARGET_HEADER_BUILTIN(_BitScanForward, "UcUNi*UNi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_BitScanReverse, "UcUNi*UNi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_BitScanForward64, "UcUNi*ULLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")

Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=360082&r1=360081&r2=360082&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Mon May  6 14:19:07 2019
@@ -7233,6 +7233,11 @@ Value *CodeGenFunction::EmitAArch64Built
     return Builder.CreateCall(F);
   }
 
+  if (BuiltinID == AArch64::BI__builtin_sponentry) {
+    llvm::Function *F = CGM.getIntrinsic(Intrinsic::sponentry);
+    return Builder.CreateCall(F);
+  }
+
   // Find out if any arguments are required to be integer constant
   // expressions.
   unsigned ICEArguments = 0;

Added: cfe/trunk/test/CodeGen/builtin-sponentry.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtin-sponentry.c?rev=360082&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/builtin-sponentry.c (added)
+++ cfe/trunk/test/CodeGen/builtin-sponentry.c Mon May  6 14:19:07 2019
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -triple aarch64-windows-gnu -Oz -emit-llvm %s -o - | FileCheck %s
+
+void *test_sponentry() {
+  return __builtin_sponentry();
+}
+// CHECK-LABEL: define dso_local i8* @test_sponentry()
+// CHECK: = tail call i8* @llvm.sponentry()
+// CHECK: ret i8*