Adding a TODO for ELF x86-32 support on MSVC.
diff --git a/iree/hal/local/elf/arch/x86_32.c b/iree/hal/local/elf/arch/x86_32.c
index 6a7c103..05d08d7 100644
--- a/iree/hal/local/elf/arch/x86_32.c
+++ b/iree/hal/local/elf/arch/x86_32.c
@@ -120,10 +120,10 @@
// Cross-ABI function calls
//==============================================================================
-// System V 386 ABI (used in IREE):
+// System V i386 ABI (used in IREE):
// https://uclibc.org/docs/psABI-i386.pdf
// Arguments:
-//
+// (reverse order on the stack; last arg furthest from stack pointer)
//
// Results:
// EAX
@@ -136,7 +136,7 @@
#if defined(IREE_PLATFORM_WINDOWS)
-#error "TODO"
+#error "TODO(#6554): need cdecl -> sysv ABI shims in x86_32_msvc.asm"
#else