From: Hanjoung Lee <hanjoung.lee@samsung.com>
Date: Thu, 17 Aug 2017 02:55:43 +0000 (+0900)
Subject: [RyuJIT/arm32] Fix LEA codegen
X-Git-Tag: submit/tizen/20210909.063632~11030^2~6513^2~308^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9d153ef076bbb220c71000961937ed40d1dd6c90;p=platform%2Fupstream%2Fdotnet%2Fruntime.git

[RyuJIT/arm32] Fix LEA codegen

Do not generate `mov` when src and dst are the same
when we generate code for LEA node.

Fix dotnet/coreclr#13418


Commit migrated from https://github.com/dotnet/coreclr/commit/92c3ea6000b37737a7caa5876a12a52d61198676
---

diff --git a/src/coreclr/src/jit/codegenarmarch.cpp b/src/coreclr/src/jit/codegenarmarch.cpp
index 11d2258..d751482 100644
--- a/src/coreclr/src/jit/codegenarmarch.cpp
+++ b/src/coreclr/src/jit/codegenarmarch.cpp
@@ -3235,7 +3235,10 @@ void CodeGen::genLeaInstruction(GenTreeAddrMode* lea)
             }
             else // offset is zero
             {
-                emit->emitIns_R_R(INS_mov, size, lea->gtRegNum, memBase->gtRegNum);
+                if (lea->gtRegNum != memBase->gtRegNum)
+                {
+                    emit->emitIns_R_R(INS_mov, size, lea->gtRegNum, memBase->gtRegNum);
+                }
             }
         }
         else