add range attribute to bindings

Author: niaow

IRBindings.cpp

@@ -18,6 +18,7 @@
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
+#include "llvm/IR/ConstantRange.h"
 
 using namespace llvm;
 
@@ -85,3 +86,20 @@ LLVMValueRef LLVMGoGetInlineAsm(LLVMTypeRef Ty, char *AsmString,
                           IsAlignStack,
                           Dialect, CanThrow);
 }
+
+LLVMAttributeRef LLVMGoCreateSmallRangeAttribute(
+  LLVMContextRef C,
+  unsigned KindID,
+  unsigned bits,
+  uint64_t lower,
+  uint64_t upper
+) {
+  return wrap(Attribute::get(
+    *unwrap(C),
+    (Attribute::AttrKind)KindID,
+    ConstantRange(
+      APInt(bits, lower),
+      APInt(bits, upper)
+    )
+  ));
+}

IRBindings.h

@@ -55,6 +55,14 @@ LLVMValueRef LLVMGoGetInlineAsm(LLVMTypeRef Ty, char *AsmString,
                                 LLVMBool IsAlignStack,
                                 LLVMInlineAsmDialect Dialect, LLVMBool CanThrow);
 
+LLVMAttributeRef LLVMGoCreateSmallRangeAttribute(
+    LLVMContextRef C,
+    unsigned KindID,
+    unsigned bits,
+    uint64_t lower,
+    uint64_t upper
+);
+
 #ifdef __cplusplus
 }
 #endif

ir.go

@@ -395,6 +395,11 @@ func (c Context) CreateTypeAttribute(kind uint, t Type) (a Attribute) {
 	return
 }
 
+func (c Context) CreateSmallRangeAttribute(kind uint, bits uint, lower, upper uint64) (a Attribute) {
+	a.C = C.LLVMGoCreateSmallRangeAttribute(c.C, C.unsigned(kind), C.unsigned(bits), C.uint64_t(lower), C.uint64_t(upper))
+	return
+}
+
 func (a Attribute) GetTypeValue() (t Type) {
 	t.C = C.LLVMGetTypeAttributeValue(a.C)
 	return