diff --git a/tests/codegen-llvm/autodiff/abi_handling.rs b/tests/codegen-llvm/autodiff/abi_handling.rs
index a8bc482fc293f..165825655d527 100644
--- a/tests/codegen-llvm/autodiff/abi_handling.rs
+++ b/tests/codegen-llvm/autodiff/abi_handling.rs
@@ -46,7 +46,7 @@ fn square(x: f32) -> f32 {
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (ptr {{.*}}%x)
-// release-NEXT: define internal fastcc noundef float
+// release-NEXT: define internal fastcc {{(noundef )?}}float
 // release-SAME: (float %x.0.val, float %x.4.val)
 #[autodiff_forward(df1, Dual, Dual)]
 #[inline(never)]
@@ -58,15 +58,15 @@ fn f1(x: &[f32; 2]) -> f32 {
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal { float, float }
 // debug-SAME: (ptr %f, float %x, float %dret)
-// release-NEXT: define internal fastcc noundef float
-// release-SAME: (float noundef %x)
+// release-NEXT: define internal fastcc {{(noundef )?}}float
+// release-SAME: (float {{(noundef )?}}%x)
 
 // CHECK-LABEL: ; abi_handling::f2
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (ptr %f, float %x)
-// release-NEXT: define internal fastcc noundef float
-// release-SAME: (float noundef %x)
+// release-NEXT: define internal fastcc {{(noundef )?}}float
+// release-SAME: (float {{(noundef )?}}%x)
 #[autodiff_reverse(df2, Const, Active, Active)]
 #[inline(never)]
 fn f2(f: fn(f32) -> f32, x: f32) -> f32 {
@@ -77,14 +77,14 @@ fn f2(f: fn(f32) -> f32, x: f32) -> f32 {
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal { float, float }
 // debug-SAME: (ptr align 4 %x, ptr align 4 %bx_0, ptr align 4 %y, ptr align 4 %by_0)
-// release-NEXT: define internal fastcc float
+// release-NEXT: define internal fastcc { float, float }
 // release-SAME: (float %x.0.val)
 
 // CHECK-LABEL: ; abi_handling::f3
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (ptr {{.*}}%x, ptr {{.*}}%y)
-// release-NEXT: define internal fastcc noundef float
+// release-NEXT: define internal fastcc {{(noundef )?}}float
 // release-SAME: (float %x.0.val)
 #[autodiff_forward(df3, Dual, Dual, Dual)]
 #[inline(never)]
@@ -97,14 +97,14 @@ fn f3<'a>(x: &'a f32, y: &'a f32) -> f32 {
 // debug-NEXT: define internal { float, float }
 // debug-SAME: (float %x.0, float %x.1, float %bx_0.0, float %bx_0.1)
 // release-NEXT: define internal fastcc { float, float }
-// release-SAME: (float noundef %x.0, float noundef %x.1)
+// release-SAME: (float {{(noundef )?}}%x.0, float {{(noundef )?}}%x.1)
 
 // CHECK-LABEL: ; abi_handling::f4
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (float %x.0, float %x.1)
-// release-NEXT: define internal fastcc noundef float
-// release-SAME: (float noundef %x.0, float noundef %x.1)
+// release-NEXT: define internal fastcc {{(noundef )?}}float
+// release-SAME: (float {{(noundef )?}}%x.0, float {{(noundef )?}}%x.1)
 #[autodiff_forward(df4, Dual, Dual)]
 #[inline(never)]
 fn f4(x: (f32, f32)) -> f32 {
@@ -116,14 +116,14 @@ fn f4(x: (f32, f32)) -> f32 {
 // debug-NEXT: define internal { float, float }
 // debug-SAME: (float %i.0, float %i.1, float %bi_0.0, float %bi_0.1)
 // release-NEXT: define internal fastcc { float, float }
-// release-SAME: (float noundef %i.0, float noundef %i.1)
+// release-SAME: (float {{(noundef )?}}%i.0, float {{(noundef )?}}%i.1)
 
 // CHECK-LABEL: ; abi_handling::f5
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (float %i.0, float %i.1)
-// release-NEXT: define internal fastcc noundef float
-// release-SAME: (float noundef %i.0, float noundef %i.1)
+// release-NEXT: define internal fastcc {{(noundef )?}}float
+// release-SAME: (float {{(noundef )?}}%i.0, float {{(noundef )?}}%i.1)
 #[autodiff_forward(df5, Dual, Dual)]
 #[inline(never)]
 fn f5(i: Input) -> f32 {
@@ -135,15 +135,15 @@ fn f5(i: Input) -> f32 {
 // debug-NEXT: define internal { float, float }
 // debug-SAME: (float %i.0, float %i.1, float %bi_0.0, float %bi_0.1)
 // release-NEXT: define internal fastcc { float, float }
-// release-SAME: float noundef %i.0, float noundef %i.1
-// release-SAME: float noundef %bi_0.0, float noundef %bi_0.1
+// release-SAME: float {{(noundef )?}}%i.0, float {{(noundef )?}}%i.1
+// release-SAME: float {{(noundef )?}}%bi_0.0, float {{(noundef )?}}%bi_0.1
 
 // CHECK-LABEL: ; abi_handling::f6
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (float %i.0, float %i.1)
-// release-NEXT: define internal fastcc noundef float
-// release-SAME: (float noundef %i.0, float noundef %i.1)
+// release-NEXT: define internal fastcc {{(noundef )?}}float
+// release-SAME: (float {{(noundef )?}}%i.0, float {{(noundef )?}}%i.1)
 #[autodiff_forward(df6, Dual, Dual)]
 #[inline(never)]
 fn f6(i: NestedInput) -> f32 {
@@ -161,7 +161,7 @@ fn f6(i: NestedInput) -> f32 {
 // CHECK-NEXT: Function Attrs
 // debug-NEXT: define internal float
 // debug-SAME: (ptr {{.*}}%x.0, ptr {{.*}}%x.1)
-// release-NEXT: define internal fastcc noundef float
+// release-NEXT: define internal fastcc {{(noundef )?}}float
 // release-SAME: (float %x.0.0.val, float %x.1.0.val)
 #[autodiff_forward(df7, Dual, Dual)]
 #[inline(never)]