From 8e721b714a92de803000c65fb8a57a1d8a810322 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 7 Jan 2013 19:58:54 +0000
Subject: [PATCH] Add support for attribute((mode(unwind_word))). Patch by Nick
Lewycky. Fixes pr8703.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171781 91177308-0d34-0410-b5e6-96231b3b80d8
---
include/clang/Basic/TargetInfo.h | 3 +++
lib/Sema/SemaDeclAttr.cpp | 4 ++++
test/Sema/attr-mode.c | 2 ++
3 files changed, 9 insertions(+)
diff --git a/include/clang/Basic/TargetInfo.h b/include/clang/Basic/TargetInfo.h
index fbf2d30e4e2..328ffd96015 100644
--- a/include/clang/Basic/TargetInfo.h
+++ b/include/clang/Basic/TargetInfo.h
@@ -338,6 +338,9 @@ public:
return getTypeWidth(IntMaxType);
}
+ // Return the size of unwind_word for this target.
+ unsigned getUnwindWordWidth() const { return getPointerWidth(0); }
+
/// \brief Return the "preferred" register width on this target.
uint64_t getRegisterWidth() const {
// Currently we assume the register width on the target matches the pointer
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index aabf061c321..accea53bb84 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -3270,6 +3270,10 @@ static void handleModeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
if (Str == "pointer")
DestWidth = S.Context.getTargetInfo().getPointerWidth(0);
break;
+ case 11:
+ if (Str == "unwind_word")
+ DestWidth = S.Context.Target.getUnwindWordWidth();
+ break;
}
QualType OldTy;
diff --git a/test/Sema/attr-mode.c b/test/Sema/attr-mode.c
index 0c5336282c4..a89c8397e0a 100644
--- a/test/Sema/attr-mode.c
+++ b/test/Sema/attr-mode.c
@@ -17,6 +17,8 @@ typedef int invalid_3 __attribute((mode(II))); // expected-error{{unknown machin
typedef struct {int i,j,k;} invalid_4 __attribute((mode(SI))); // expected-error{{mode attribute only supported for integer and floating-point types}}
typedef float invalid_5 __attribute((mode(SI))); // expected-error{{type of machine mode does not match type of base type}}
+typedef unsigned unwind_word __attribute((mode(unwind_word)));
+
int **__attribute((mode(QI)))* i32; // expected-error{{mode attribute}}
typedef _Complex double c32 __attribute((mode(SC)));
--
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