[WebAssembly] More uses of uint8_t for single byte values

Summary: It looks like this was missing from D43921.

Reviewers: sbc100

Subscribers: jfb, dschuff, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D43991

llvm-svn: 326541

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h

@@ -158,19 +158,19 @@ static const unsigned LoadP2AlignOperandNo = 1;
 static const unsigned StoreP2AlignOperandNo = 0;
 
 /// This is used to indicate block signatures.
-enum class ExprType {
-  Void    = -0x40,
-  I32     = -0x01,
-  I64     = -0x02,
-  F32     = -0x03,
-  F64     = -0x04,
-  I8x16   = -0x05,
-  I16x8   = -0x06,
-  I32x4   = -0x07,
-  F32x4   = -0x08,
-  B8x16   = -0x09,
-  B16x8   = -0x0a,
-  B32x4   = -0x0b
+enum class ExprType : unsigned {
+  Void    = 0x40,
+  I32     = 0x7F,
+  I64     = 0x7E,
+  F32     = 0x7D,
+  F64     = 0x7C,
+  I8x16   = 0x7B,
+  I16x8   = 0x7A,
+  I32x4   = 0x79,
+  F32x4   = 0x78,
+  B8x16   = 0x77,
+  B16x8   = 0x76,
+  B32x4   = 0x75
 };
 
 /// Instruction opcodes emitted via means other than CodeGen.