From 9300de4d1cd151828ab2548c242d34d6ad9124d4 Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Tue, 14 Jul 2020 09:28:57 -0400
Subject: [PATCH] [InstSimplify] add test with nobuiltin attribute (PR46627);
 NFC

---
 llvm/test/Transforms/InstSimplify/call.ll | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/llvm/test/Transforms/InstSimplify/call.ll b/llvm/test/Transforms/InstSimplify/call.ll
index 9d0147b5ba52c..019def569f15b 100644
--- a/llvm/test/Transforms/InstSimplify/call.ll
+++ b/llvm/test/Transforms/InstSimplify/call.ll
@@ -1038,3 +1038,19 @@ define i32 @call_undef_musttail() {
   %x = musttail call i32 undef()
   ret i32 %x
 }
+
+; FIXME: This is not the builtin fmax, so we don't know anything about its behavior.
+
+define float @nobuiltin_fmax() {
+; CHECK-LABEL: @nobuiltin_fmax(
+; CHECK-NEXT:    [[M:%.*]] = call float @fmaxf(float 0.000000e+00, float 1.000000e+00) #3
+; CHECK-NEXT:    ret float [[M]]
+;
+  %m = call float @fmaxf(float 0.0, float 1.0) #0
+  %r = call float @llvm.fabs.f32(float %m)
+  ret float %r
+}
+
+declare float @fmaxf(float, float)
+
+attributes #0 = { nobuiltin readnone }