diff --git a/clang/test/CodeGen/arm-cde-reinterpret.c b/clang/test/CodeGen/arm-cde-reinterpret.c
--- a/clang/test/CodeGen/arm-cde-reinterpret.c
+++ b/clang/test/CodeGen/arm-cde-reinterpret.c
@@ -1,8 +1,11 @@
-// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
 // RUN: %clang_cc1 -triple thumbv8.1m.main-arm-none-eabi \
 // RUN:   -target-feature +cdecp0 -target-feature +mve.fp \
 // RUN:   -mfloat-abi hard -O0 -disable-O0-optnone \
-// RUN:   -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
+// RUN:   -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s --check-prefixes=CHECK,CHECK-LE
+// RUN: %clang_cc1 -triple thumbebv8.1m.main-arm-none-eabi \
+// RUN:   -target-feature +cdecp0 -target-feature +mve.fp \
+// RUN:   -mfloat-abi hard -O0 -disable-O0-optnone \
+// RUN:   -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s --check-prefixes=CHECK,CHECK-BE
 
 #include <arm_cde.h>
 
@@ -16,7 +19,8 @@
 
 // CHECK-LABEL: @test_u16(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <8 x i16>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <8 x i16>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <8 x i16> @llvm.arm.mve.vreinterpretq.v8i16.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <8 x i16> [[TMP0]]
 //
 uint16x8_t test_u16(uint8x16_t x) {
@@ -25,7 +29,8 @@
 
 // CHECK-LABEL: @test_s32(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x i32>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x i32>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <4 x i32> @llvm.arm.mve.vreinterpretq.v4i32.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <4 x i32> [[TMP0]]
 //
 int32x4_t test_s32(uint8x16_t x) {
@@ -34,7 +39,8 @@
 
 // CHECK-LABEL: @test_u32(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x i32>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x i32>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <4 x i32> @llvm.arm.mve.vreinterpretq.v4i32.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <4 x i32> [[TMP0]]
 //
 uint32x4_t test_u32(uint8x16_t x) {
@@ -43,7 +49,8 @@
 
 // CHECK-LABEL: @test_s64(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <2 x i64>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <2 x i64>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <2 x i64> @llvm.arm.mve.vreinterpretq.v2i64.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <2 x i64> [[TMP0]]
 //
 int64x2_t test_s64(uint8x16_t x) {
@@ -52,7 +59,8 @@
 
 // CHECK-LABEL: @test_u64(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <2 x i64>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <2 x i64>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <2 x i64> @llvm.arm.mve.vreinterpretq.v2i64.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <2 x i64> [[TMP0]]
 //
 uint64x2_t test_u64(uint8x16_t x) {
@@ -61,7 +69,8 @@
 
 // CHECK-LABEL: @test_f16(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <8 x half>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <8 x half>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <8 x half> @llvm.arm.mve.vreinterpretq.v8f16.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <8 x half> [[TMP0]]
 //
 float16x8_t test_f16(uint8x16_t x) {
@@ -70,7 +79,8 @@
 
 // CHECK-LABEL: @test_f32(
 // CHECK-NEXT:  entry:
-// CHECK-NEXT:    [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x float>
+// CHECK-LE-NEXT: [[TMP0:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x float>
+// CHECK-BE-NEXT: [[TMP0:%.*]] = call <4 x float> @llvm.arm.mve.vreinterpretq.v4f32.v16i8(<16 x i8> [[X:%.*]])
 // CHECK-NEXT:    ret <4 x float> [[TMP0]]
 //
 float32x4_t test_f32(uint8x16_t x) {
diff --git a/clang/test/Headers/arm-cde-header.c b/clang/test/Headers/arm-cde-header.c
--- a/clang/test/Headers/arm-cde-header.c
+++ b/clang/test/Headers/arm-cde-header.c
@@ -1,7 +1,9 @@
 // RUN: %clang_cc1 -std=c89 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve.fp -target-feature +cdecp0 -fsyntax-only %s
-// RUN: %clang_cc1 -std=c99 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve.fp -target-feature +cdecp0 -fsyntax-only %s
-// RUN: %clang_cc1 -std=c11 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve.fp -target-feature +cdecp0 -fsyntax-only %s
+// RUN: %clang_cc1 -std=c17 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve -target-feature +cdecp0 -fsyntax-only %s
 // RUN: %clang_cc1 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve.fp -target-feature +cdecp0 -fsyntax-only %s
+// RUN: %clang_cc1 -xc++ -std=c++98 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve -target-feature +cdecp0 -fsyntax-only %s
+// RUN: %clang_cc1 -xc++ -std=c++20 -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve.fp -target-feature +cdecp0 -fsyntax-only %s
+// RUN: %clang_cc1 -xc++ -triple thumbv8.1m.main-arm-none-eabi -fallow-half-arguments-and-returns -target-feature +mve.fp -target-feature +cdecp0 -fsyntax-only %s
 
 // Check that the headers don't conflict with each other
 #include <arm_cde.h>