[llvm] ARM: Add missing test coverage for windows frexp libcalls (PR #146690)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/146690

fp128 case crashes, so left off. Also didn't just add to the
other frexp test, since update_llc_test_checks seems to just
ignore this case for some reason, and the other windows tests
are also separated into this subdirectory.

>From b2fa0ce78473d28c73e975953fdb1029cd175e00 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Wed, 2 Jul 2025 22:11:37 +0900
Subject: [PATCH] ARM: Add missing test coverage for windows frexp libcalls

fp128 case crashes, so left off. Also didn't just add to the
other frexp test, since update_llc_test_checks seems to just
ignore this case for some reason, and the other windows tests
are also separated into this subdirectory.
---
 llvm/test/CodeGen/ARM/Windows/frexp.ll | 28 ++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 llvm/test/CodeGen/ARM/Windows/frexp.ll

diff --git a/llvm/test/CodeGen/ARM/Windows/frexp.ll b/llvm/test/CodeGen/ARM/Windows/frexp.ll
new file mode 100644
index 0000000000000..5646c75a75979
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/Windows/frexp.ll
@@ -0,0 +1,28 @@
+; RUN: llc -mtriple thumbv7--windows-itanium < %s | FileCheck %s
+
+; CHECK-LABEL: test_frexp_f16_i32:
+; CHECK: bl __gnu_h2f_ieee
+; CHECK: vcvt.f64.f32 d0, s0
+; CHECK: bl frexp
+; CHECK: vcvt.f32.f64 s0, d0
+; CHECK: bl __gnu_f2h_ieee
+define { half, i32 } @test_frexp_f16_i32(half %a) {
+  %result = call { half, i32 } @llvm.frexp.f16.i32(half %a)
+  ret { half, i32 } %result
+}
+
+; CHECK-LABEL: test_frexp_f32_i32:
+; CHECK: vcvt.f64.f32
+; CHECK: bl frexp
+; CHECK: vcvt.f32.f64	s0, d0
+define { float, i32 } @test_frexp_f32_i32(float %a) {
+  %result = call { float, i32 } @llvm.frexp.f32.i32(float %a)
+  ret { float, i32 } %result
+}
+
+; CHECK-LABEL: test_frexp_f64_i32:
+; CHECK: bl frexp
+define { double, i32 } @test_frexp_f64_i32(double %a) {
+  %result = call { double, i32 } @llvm.frexp.f64.i32(double %a)
+  ret { double, i32 } %result
+}