Don't initialize the first parameter of _BitScanReverse* functions

Like the document example, no need to initialize `r` to 0. https://docs.microsoft.com/en-us/cpp/intrinsics/bitscanreverse-bitscanreverse64
2021-09-25 16:36:53 +08:00
parent cc22042da0
commit 95f492ea17
11 changed files with 21 additions and 30 deletions
@@ -145,7 +145,7 @@ MEM_STATIC unsigned BIT_highbit32 (U32 val)
 #       if STATIC_BMI2 == 1
 		return _lzcnt_u32(val) ^ 31;
 #       else
-		unsigned long r = 0;
+		unsigned long r;
 		return _BitScanReverse(&r, val) ? (unsigned)r : 0;
 #       endif
 #   elif defined(__GNUC__) && (__GNUC__ >= 3)   /* Use GCC Intrinsic */
@@ -358,7 +358,7 @@ MEM_STATIC U32 ZSTD_highbit32(U32 val)   /* compress, dictBuilder, decodeCorpus
 #       if STATIC_BMI2 == 1
            return _lzcnt_u32(val)^31;
 #       else
-            unsigned long r=0;
+            unsigned long r;
            return _BitScanReverse(&r, val) ? (unsigned)r : 0;
 #       endif
 #   elif defined(__GNUC__) && (__GNUC__ >= 3)   /* GCC Intrinsic */