Add function attribute 'optnone'.

This function attribute indicates that the function is not optimized
by any optimization or code generator passes with the 
exception of interprocedural optimization passes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189101 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 6 insertions, 3 deletions

diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index a7d17b7b83..57834c5292 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -165,8 +165,9 @@ typedef enum {
        a temporary measure until the API/ABI impact to the C API is understood
        and the path forward agreed upon.
     LLVMAddressSafety = 1ULL << 32,
-    LLVMStackProtectStrongAttribute = 1ULL<<33
-    LLVMCold = 1ULL << 34
+    LLVMStackProtectStrongAttribute = 1ULL<<33,
+    LLVMCold = 1ULL << 34,
+    LLVMOptimizeNone = 1ULL << 35
     */
 } LLVMAttribute;
 
diff --git a/include/llvm/Bitcode/LLVMBitCodes.h b/include/llvm/Bitcode/LLVMBitCodes.h
index 463e3b919d..90e9063d90 100644
--- a/include/llvm/Bitcode/LLVMBitCodes.h
+++ b/include/llvm/Bitcode/LLVMBitCodes.h
@@ -368,7 +368,8 @@ namespace bitc {
     ATTR_KIND_UW_TABLE = 33,
     ATTR_KIND_Z_EXT = 34,
     ATTR_KIND_BUILTIN = 35,
-    ATTR_KIND_COLD = 36
+    ATTR_KIND_COLD = 36,
+    ATTR_KIND_OPTIMIZE_NONE = 37
   };
 
 } // End bitc namespace
diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h
index 2183758fbc..ebee637004 100644
--- a/include/llvm/IR/Attributes.h
+++ b/include/llvm/IR/Attributes.h
@@ -88,6 +88,7 @@ public:
     NoReturn,              ///< Mark the function as not returning
     NoUnwind,              ///< Function doesn't unwind stack
     OptimizeForSize,       ///< opt_size
+    OptimizeNone,          ///< Function must not be optimized.
     ReadNone,              ///< Function does not access memory
     ReadOnly,              ///< Function only reads from memory
     Returned,              ///< Return value is always equal to this argument