fix PR6623: when optimizing for size, don't inline memcpy/memsets
that are too large. This causes the freebsd bootloader to be too
large apparently.
It's unclear if this should be an -Os or -Oz thing. Thoughts welcome.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105228 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/memcpy.ll b/test/CodeGen/X86/memcpy.ll
index 16bf7c5..7bc31be 100644
--- a/test/CodeGen/X86/memcpy.ll
+++ b/test/CodeGen/X86/memcpy.ll
@@ -25,3 +25,33 @@
; CHECK: memcpy
}
+; Large constant memcpy's should lower to a call when optimizing for size.
+; PR6623
+define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone {
+entry:
+ tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
+ ret void
+; CHECK: test3:
+; CHECK: memcpy
+}
+
+; Large constant memcpy's should be inlined when not optimizing for size.
+define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone {
+entry:
+ tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
+ ret void
+; CHECK: test4:
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+; CHECK: movq
+}
+