[Wasm RyuJit] codegen for small structs #125199
Description
N006 (???,???) [000027] -----+----- t27 = CNS_INT int 0
/--* t6 int arg3 $3
+--* t9 int gctx $2
+--* t26 int wasm sp $0
+--* t25 int r2r cell $1
+--* t27 int wasm pep $4
N007 (???,???) [000007] --CXG+----- t7 = * CALL r2r_ind int System.Runtime.CompilerServices.ObjectHandleOnStack:Create[System.__Canon](byref):System.Runtime.CompilerServices.ObjectHandleOnStack
/--* t7 int
N008 (???,???) [000016] DACXG+----- * STORE_LCL_VAR struct<System.Runtime.CompilerServices.ObjectHandleOnStack, 4> V10 tmp3
This blows up under RewriteLocalStackStore because of the int/struct mix.
To repro, try crossgenning a wasm SPC with rsp file like the following:
--targetos:browser
--targetarch:wasm
--obj-format=wasm
--codegenopt:JitDump=Ctor
--singlemethodtypename:"System.Array"
--singlemethodname:"Ctor"
--singlemethodindex:2
-r:"c:\repos\runtime2\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root\*.dll"
"c:\repos\runtime2\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root\System.Private.CoreLib.dll"