diff --git a/tests/codegen/float/f128.rs b/tests/codegen/float/f128.rs
index 32c5be1ec65..80b572fbbc9 100644
--- a/tests/codegen/float/f128.rs
+++ b/tests/codegen/float/f128.rs
@@ -1,3 +1,8 @@
+// 32-bit x86 returns `f32` and `f64` differently to avoid the x87 stack.
+//@ revisions: x86 other
+//@[x86] only-x86
+//@[other] ignore-x86
+
 // Verify that our intrinsics generate the correct LLVM calls for f128
 
 #![crate_type = "lib"]
@@ -138,14 +143,16 @@ pub fn f128_as_f16(a: f128) -> f16 {
     a as f16
 }
 
-// CHECK-LABEL: float @f128_as_f32(
+// other-LABEL: float @f128_as_f32(
+// x86-LABEL: i32 @f128_as_f32(
 #[no_mangle]
 pub fn f128_as_f32(a: f128) -> f32 {
     // CHECK: fptrunc fp128 %{{.+}} to float
     a as f32
 }
 
-// CHECK-LABEL: double @f128_as_f64(
+// other-LABEL: double @f128_as_f64(
+// x86-LABEL: void @f128_as_f64(
 #[no_mangle]
 pub fn f128_as_f64(a: f128) -> f64 {
     // CHECK: fptrunc fp128 %{{.+}} to double
diff --git a/tests/codegen/float/f16.rs b/tests/codegen/float/f16.rs
index 96daac869c2..2910d7d3e92 100644
--- a/tests/codegen/float/f16.rs
+++ b/tests/codegen/float/f16.rs
@@ -1,3 +1,8 @@
+// 32-bit x86 returns `f32` and `f64` differently to avoid the x87 stack.
+//@ revisions: x86 other
+//@[x86] only-x86
+//@[other] ignore-x86
+
 // Verify that our intrinsics generate the correct LLVM calls for f16
 
 #![crate_type = "lib"]
@@ -140,14 +145,16 @@ pub fn f16_as_self(a: f16) -> f16 {
     a as f16
 }
 
-// CHECK-LABEL: float @f16_as_f32(
+// other-LABEL: float @f16_as_f32(
+// x86-LABEL: i32 @f16_as_f32(
 #[no_mangle]
 pub fn f16_as_f32(a: f16) -> f32 {
     // CHECK: fpext half %{{.+}} to float
     a as f32
 }
 
-// CHECK-LABEL: double @f16_as_f64(
+// other-LABEL: double @f16_as_f64(
+// x86-LABEL: void @f16_as_f64(
 #[no_mangle]
 pub fn f16_as_f64(a: f16) -> f64 {
     // CHECK: fpext half %{{.+}} to double
diff --git a/tests/codegen/issues/issue-32031.rs b/tests/codegen/issues/issue-32031.rs
index 9693c414a67..4d6895166f1 100644
--- a/tests/codegen/issues/issue-32031.rs
+++ b/tests/codegen/issues/issue-32031.rs
@@ -1,11 +1,16 @@
 //@ compile-flags: -C no-prepopulate-passes -Copt-level=0
+// 32-bit x86 returns `f32` and `f64` differently to avoid the x87 stack.
+//@ revisions: x86 other
+//@[x86] only-x86
+//@[other] ignore-x86
 
 #![crate_type = "lib"]
 
 #[no_mangle]
 pub struct F32(f32);
 
-// CHECK: define{{.*}}float @add_newtype_f32(float %a, float %b)
+// other: define{{.*}}float @add_newtype_f32(float %a, float %b)
+// x86: define{{.*}}i32 @add_newtype_f32(float %a, float %b)
 #[inline(never)]
 #[no_mangle]
 pub fn add_newtype_f32(a: F32, b: F32) -> F32 {
@@ -15,7 +20,8 @@ pub fn add_newtype_f32(a: F32, b: F32) -> F32 {
 #[no_mangle]
 pub struct F64(f64);
 
-// CHECK: define{{.*}}double @add_newtype_f64(double %a, double %b)
+// other: define{{.*}}double @add_newtype_f64(double %a, double %b)
+// x86: define{{.*}}void @add_newtype_f64(ptr{{.*}}sret([8 x i8]){{.*}}%_0, double %a, double %b)
 #[inline(never)]
 #[no_mangle]
 pub fn add_newtype_f64(a: F64, b: F64) -> F64 {
diff --git a/tests/codegen/union-abi.rs b/tests/codegen/union-abi.rs
index 9e02fa9ff35..08015014456 100644
--- a/tests/codegen/union-abi.rs
+++ b/tests/codegen/union-abi.rs
@@ -1,5 +1,9 @@
 //@ ignore-emscripten vectors passed directly
 //@ compile-flags: -O -C no-prepopulate-passes
+// 32-bit x86 returns `f32` differently to avoid the x87 stack.
+//@ revisions: x86 other
+//@[x86] only-x86
+//@[other] ignore-x86
 
 // This test that using union forward the abi of the inner type, as
 // discussed in #54668
@@ -67,7 +71,8 @@ pub union UnionF32 {
     a: f32,
 }
 
-// CHECK: define {{(dso_local )?}}float @test_UnionF32(float %_1)
+// other: define {{(dso_local )?}}float @test_UnionF32(float %_1)
+// x86: define {{(dso_local )?}}i32 @test_UnionF32(float %_1)
 #[no_mangle]
 pub fn test_UnionF32(_: UnionF32) -> UnionF32 {
     loop {}
@@ -78,7 +83,8 @@ pub union UnionF32F32 {
     b: f32,
 }
 
-// CHECK: define {{(dso_local )?}}float @test_UnionF32F32(float %_1)
+// other: define {{(dso_local )?}}float @test_UnionF32F32(float %_1)
+// x86: define {{(dso_local )?}}i32 @test_UnionF32F32(float %_1)
 #[no_mangle]
 pub fn test_UnionF32F32(_: UnionF32F32) -> UnionF32F32 {
     loop {}