Taints the non-acquire RMW's store address with the load part

[oota-llvm.git] / include / llvm / Support / LEB128.h

diff --git a/include/llvm/Support/LEB128.h b/include/llvm/Support/LEB128.h
index 3d7379250af4df7cd53f56477912545db1a8982d..6a95432ca2d93c69dd5c89e5186844d75d8f3b81 100644 (file)
--- a/include/llvm/Support/LEB128.h
+++ b/include/llvm/Support/LEB128.h
@@ -77,12 +77,12 @@ inline unsigned encodeULEB128(uint64_t Value, uint8_t *p,
 
 
 /// Utility function to decode a ULEB128 value.
-inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n = 0) {
+inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n = nullptr) {
   const uint8_t *orig_p = p;
   uint64_t Value = 0;
   unsigned Shift = 0;
   do {
-    Value += (*p & 0x7f) << Shift;
+    Value += uint64_t(*p & 0x7f) << Shift;
     Shift += 7;
   } while (*p++ >= 128);
   if (n)
@@ -90,6 +90,32 @@ inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n = 0) {
   return Value;
 }
 
+/// Utility function to decode a SLEB128 value.
+inline int64_t decodeSLEB128(const uint8_t *p, unsigned *n = nullptr) {
+  const uint8_t *orig_p = p;
+  int64_t Value = 0;
+  unsigned Shift = 0;
+  uint8_t Byte;
+  do {
+    Byte = *p++;
+    Value |= ((Byte & 0x7f) << Shift);
+    Shift += 7;
+  } while (Byte >= 128);
+  // Sign extend negative numbers.
+  if (Byte & 0x40)
+    Value |= (-1ULL) << Shift;
+  if (n)
+    *n = (unsigned)(p - orig_p);
+  return Value;
+}
+
+
+/// Utility function to get the size of the ULEB128-encoded value.
+extern unsigned getULEB128Size(uint64_t Value);
+
+/// Utility function to get the size of the SLEB128-encoded value.
+extern unsigned getSLEB128Size(int64_t Value);
+
 }  // namespace llvm
 
 #endif  // LLVM_SYSTEM_LEB128_H