Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833
2019-01-23 08:21:40 +00:00
parent a7724cd563
commit 279aa8f685
28482 changed files with 3866972 additions and 44 deletions
--- a/external/llvm/test/CodeGen/X86/tail-threshold.ll
+++ b/external/llvm/test/CodeGen/X86/tail-threshold.ll
@@ -0,0 +1,44 @@
+; RUN: llc -mtriple=x86_64-pc-linux-gnu -tail-merge-threshold 2 < %s | FileCheck %s
+
+; Test that we still do some merging if a block has more than
+; tail-merge-threshold predecessors.
+
+; CHECK: 	callq	bar
+; CHECK:	callq	bar
+; CHECK:	callq	bar
+; CHECK-NOT:    callq
+
+declare void @bar()
+
+define void @foo(i32 %xxx) {
+entry:
+  switch i32 %xxx, label %bb4 [
+    i32 0, label %bb0
+    i32 1, label %bb1
+    i32 2, label %bb2
+    i32 3, label %bb3
+  ]
+
+bb0:
+  call void @bar()
+  br label %bb5
+
+bb1:
+ call void @bar()
+ br label %bb5
+
+bb2:
+  call void @bar()
+  br label %bb5
+
+bb3:
+  call void @bar()
+  br label %bb5
+
+bb4:
+  call void @bar()
+  br label %bb5
+
+bb5:
+  ret void
+}