diff --git a/iree/compiler/InputConversion/MHLO/BUILD b/iree/compiler/InputConversion/MHLO/BUILD
index e7bfa5a..1ebb8c4 100644
--- a/iree/compiler/InputConversion/MHLO/BUILD
+++ b/iree/compiler/InputConversion/MHLO/BUILD
@@ -64,6 +64,7 @@
         ":PassesIncGen",
         "//iree/compiler/Dialect/Flow/IR",
         "//iree/compiler/Dialect/Util/IR",
+        "//iree/compiler/Dialect/Util/Transforms",
         "//iree/compiler/InputConversion/Common",
         "//llvm-external-projects/iree-dialects:IREELinalgExtDialect",
         "//llvm-external-projects/iree-dialects:IREELinalgExtPasses",
diff --git a/iree/compiler/InputConversion/MHLO/CMakeLists.txt b/iree/compiler/InputConversion/MHLO/CMakeLists.txt
index 317734a..630b81a 100644
--- a/iree/compiler/InputConversion/MHLO/CMakeLists.txt
+++ b/iree/compiler/InputConversion/MHLO/CMakeLists.txt
@@ -90,6 +90,7 @@
     MhloToStandard
     iree::compiler::Dialect::Flow::IR
     iree::compiler::Dialect::Util::IR
+    iree::compiler::Dialect::Util::Transforms
     iree::compiler::InputConversion::Common
     tensorflow::external_mhlo_includes
   PUBLIC
diff --git a/iree/compiler/InputConversion/MHLO/Passes.cpp b/iree/compiler/InputConversion/MHLO/Passes.cpp
index 4935e05..7dd22b2 100644
--- a/iree/compiler/InputConversion/MHLO/Passes.cpp
+++ b/iree/compiler/InputConversion/MHLO/Passes.cpp
@@ -6,6 +6,7 @@
 
 #include "iree/compiler/InputConversion/MHLO/Passes.h"
 
+#include "iree/compiler/Dialect/Util/Transforms/Passes.h"
 #include "iree/compiler/InputConversion/Common/Passes.h"
 #include "mlir-hlo/Dialect/mhlo/transforms/passes.h"
 #include "mlir/Conversion/ReconcileUnrealizedCasts/ReconcileUnrealizedCasts.h"
@@ -22,6 +23,19 @@
 namespace iree_compiler {
 namespace MHLO {
 
+// TODO(#8745): remove these flags when the -iree-flow-demote-* flags can be
+// used without tripping upstream verifier issues.
+static llvm::cl::opt<bool> clDemoteI64ToI32(
+    "iree-mhlo-demote-i64-to-i32",
+    llvm::cl::desc(
+        "Converts all MHLO i64 ops and values into i32 counterparts."),
+    llvm::cl::init(true));
+static llvm::cl::opt<bool> clDemoteF64ToF32(
+    "iree-mhlo-demote-f64-to-f32",
+    llvm::cl::desc(
+        "Converts all MHLO f64 ops and values into f32 counterparts."),
+    llvm::cl::init(true));
+
 void registerMHLOConversionPassPipeline() {
   PassPipelineRegistration<> mhlo(
       "iree-mhlo-input-transformation-pipeline",
@@ -58,6 +72,17 @@
   // use of the CFG we can continue inlining.
   passManager.addPass(mlir::createInlinerPass());
 
+  // Hacky type conversion to work around lack of type support lower in the
+  // stack. This is often required because of implicit i64 insertion by JAX/HLO
+  // that we don't want forcing 32-bit embedded devices to support.
+  // TODO(#8745): remove these and prefer the flow pipeline options instead.
+  if (clDemoteI64ToI32) {
+    passManager.addPass(IREE::Util::createDemoteI64ToI32Pass());
+  }
+  if (clDemoteF64ToF32) {
+    passManager.addPass(IREE::Util::createDemoteF64ToF32Pass());
+  }
+
   // Perform initial cleanup. createLegalizeInputTypes could rewrite types. In
   // this context, some operations could be folded away.
   passManager.addNestedPass<func::FuncOp>(mlir::createCanonicalizerPass());
diff --git a/iree/test/e2e/models/unidirectional_lstm.mlir b/iree/test/e2e/models/unidirectional_lstm.mlir
index 6d68dda..96dab18 100644
--- a/iree/test/e2e/models/unidirectional_lstm.mlir
+++ b/iree/test/e2e/models/unidirectional_lstm.mlir
@@ -1,6 +1,5 @@
 // An example LSTM exported from a python reference model with dummy weights.
 
-// RUN: iree-run-mlir %s --iree-input-type=mhlo -iree-hal-target-backends=vmvx -function-input="1x5xf32=[0,1,0,3,4]" -function-input="1x5x2x2xf32=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]" | FileCheck %s
 // RUN: iree-run-mlir %s --iree-input-type=mhlo -iree-hal-target-backends=dylib-llvm-aot -function-input="1x5xf32=[0,1,0,3,4]" -function-input="1x5x2x2xf32=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]" | FileCheck %s
 // RUN: [[ $IREE_VMVX_DISABLE == 1 ]] || (iree-run-mlir %s --iree-input-type=mhlo -iree-hal-target-backends=vmvx -function-input="1x5xf32=[0,1,0,3,4]" -function-input="1x5x2x2xf32=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]" | FileCheck %s)
 // RUN: [[ $IREE_VULKAN_DISABLE == 1 ]] || (iree-run-mlir %s --iree-input-type=mhlo -iree-hal-target-backends=vulkan-spirv -function-input="1x5xf32=[0,1,0,3,4]" -function-input="1x5x2x2xf32=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]" | FileCheck %s)
diff --git a/llvm-external-projects/iree-compiler-api/pyproject.toml b/llvm-external-projects/iree-compiler-api/pyproject.toml
index a5ba7a4..43e846c 100644
--- a/llvm-external-projects/iree-compiler-api/pyproject.toml
+++ b/llvm-external-projects/iree-compiler-api/pyproject.toml
@@ -1,15 +1,15 @@
-[build-system]
-requires = [
-    "setuptools>=42",
-    "wheel",
-    # There is no fundamental reason to pin this CMake version, beyond
-    # build stability.
-    "cmake==3.22.2",
-    "ninja==1.10.2",
-    # MLIR build depends.
-    "numpy",
-    # Version 2.7.0 excluded: https://github.com/pybind/pybind11/issues/3136
-    "pybind11>=2.6.0,!=2.7.0",
-    "PyYAML",
-]
-build-backend = "setuptools.build_meta"
+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel",
+    # There is no fundamental reason to pin this CMake version, beyond
+    # build stability.
+    "cmake==3.22.2",
+    "ninja==1.10.2",
+    # MLIR build depends.
+    "numpy",
+    # Version 2.7.0 excluded: https://github.com/pybind/pybind11/issues/3136
+    "pybind11>=2.6.0,!=2.7.0",
+    "PyYAML",
+]
+build-backend = "setuptools.build_meta"