diff options
Diffstat (limited to 'test/CodeGen')
-rw-r--r-- | test/CodeGen/X86/tailcall-cgp-dup.ll | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/test/CodeGen/X86/tailcall-cgp-dup.ll b/test/CodeGen/X86/tailcall-cgp-dup.ll new file mode 100644 index 0000000..10fe146 --- /dev/null +++ b/test/CodeGen/X86/tailcall-cgp-dup.ll @@ -0,0 +1,63 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s + +; Teach CGP to dup returns to enable tail call optimization. +; rdar://9147433 + +define i32 @foo(i32 %x) nounwind ssp { +; CHECK: foo: +entry: + switch i32 %x, label %return [ + i32 1, label %sw.bb + i32 2, label %sw.bb1 + i32 3, label %sw.bb3 + i32 4, label %sw.bb5 + i32 5, label %sw.bb7 + i32 6, label %sw.bb9 + ] + +sw.bb: ; preds = %entry +; CHECK: jmp _f1 + %call = tail call i32 @f1() nounwind + br label %return + +sw.bb1: ; preds = %entry +; CHECK: jmp _f2 + %call2 = tail call i32 @f2() nounwind + br label %return + +sw.bb3: ; preds = %entry +; CHECK: jmp _f3 + %call4 = tail call i32 @f3() nounwind + br label %return + +sw.bb5: ; preds = %entry +; CHECK: jmp _f4 + %call6 = tail call i32 @f4() nounwind + br label %return + +sw.bb7: ; preds = %entry +; CHECK: jmp _f5 + %call8 = tail call i32 @f5() nounwind + br label %return + +sw.bb9: ; preds = %entry +; CHECK: jmp _f6 + %call10 = tail call i32 @f6() nounwind + br label %return + +return: ; preds = %entry, %sw.bb9, %sw.bb7, %sw.bb5, %sw.bb3, %sw.bb1, %sw.bb + %retval.0 = phi i32 [ %call10, %sw.bb9 ], [ %call8, %sw.bb7 ], [ %call6, %sw.bb5 ], [ %call4, %sw.bb3 ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ], [ 0, %entry ] + ret i32 %retval.0 +} + +declare i32 @f1() + +declare i32 @f2() + +declare i32 @f3() + +declare i32 @f4() + +declare i32 @f5() + +declare i32 @f6() |