Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/test/Transforms/Inline/ephemeral.ll

@@ -0,0 +1,30 @@
+; RUN: opt -S -Oz %s | FileCheck %s
+
+@a = global i32 4
+
+define i32 @inner() {
+  %a1 = load volatile i32, i32* @a
+
+  ; Here are enough instructions to prevent inlining, but because they are used
+  ; only by the @llvm.assume intrinsic, they're free (and, thus, inlining will
+  ; still happen).
+  %a2 = mul i32 %a1, %a1
+  %a3 = sub i32 %a1, 5
+  %a4 = udiv i32 %a3, -13
+  %a5 = mul i32 %a4, %a4
+  %a6 = add i32 %a5, %a5
+  %ca = icmp sgt i32 %a6, -7
+  tail call void @llvm.assume(i1 %ca)
+
+  ret i32 %a1
+}
+
+; @inner() should be inlined for -Oz.
+; CHECK-NOT: call i1 @inner
+define i32 @outer() optsize {
+   %r = call i32 @inner()
+   ret i32 %r
+}
+
+declare void @llvm.assume(i1) nounwind
+