JIT: Fix calculation of opcodeOffsets in Compiler::impImportBlockCode

Commit migrated from https://github.com/dotnet/coreclr/commit/e6167a0742157f152c399fd390a0d41d62edff2a

diff --git a/src/coreclr/src/jit/importer.cpp b/src/coreclr/src/jit/importer.cpp
index e325d05..4774c24 100644 (file)
--- a/src/coreclr/src/jit/importer.cpp
+++ b/src/coreclr/src/jit/importer.cpp
@@ -9972,9 +9972,9 @@ void Compiler::impImportBlockCode(BasicBlock* block)
             } cval;
 
             case CEE_PREFIX1:
-                opcode = (OPCODE)(getU1LittleEndian(codeAddr) + 256);
-                codeAddr += sizeof(__int8);
+                opcode     = (OPCODE)(getU1LittleEndian(codeAddr) + 256);
                 opcodeOffs = (IL_OFFSET)(codeAddr - info.compCode);
+                codeAddr += sizeof(__int8);
                 goto DECODE_OPCODE;
 
             SPILL_APPEND:
@@ -12448,9 +12448,9 @@ void Compiler::impImportBlockCode(BasicBlock* block)
                 impValidateMemoryAccessOpcode(codeAddr, codeEndp, false);
 
             PREFIX:
-                opcode = (OPCODE)getU1LittleEndian(codeAddr);
-                codeAddr += sizeof(__int8);
+                opcode     = (OPCODE)getU1LittleEndian(codeAddr);
                 opcodeOffs = (IL_OFFSET)(codeAddr - info.compCode);
+                codeAddr += sizeof(__int8);
                 goto DECODE_OPCODE;
 
             case CEE_VOLATILE: