llvm-mirror/test/CodeGen/X86/tailcall-fastisel.ll

; RUN: llc < %s -mtriple=x86_64-apple-darwin -tailcallopt -fast-isel -fast-isel-abort | FileCheck %s

%0 = type { i64, i32, i8* }

define fastcc i8* @"visit_array_aux<`Reference>"(%0 %arg, i32 %arg1) nounwind {
fail:                                             ; preds = %entry
  %tmp20 = tail call fastcc i8* @"visit_array_aux<`Reference>"(%0 %arg, i32 undef) ; <i8*> [#uses=1]
; CHECK: jmp "_visit_array_aux<`Reference>" ## TAILCALL
  ret i8* %tmp20
}

define i32 @foo() nounwind {
entry:
 %0 = tail call i32 (...)* @bar() nounwind       ; <i32> [#uses=1]
 ret i32 %0
}

declare i32 @bar(...) nounwind
Add a triple to this test. llvm-svn: 169803 2012-12-11 01:51:36 +01:00			`; RUN: llc < %s -mtriple=x86_64-apple-darwin -tailcallopt -fast-isel -fast-isel-abort \| FileCheck %s`
Fix fast-isel to avoid selecting the return instruction if a tail call has been encountered. llvm-svn: 89444 2009-11-20 03:51:26 +01:00
			`%0 = type { i64, i32, i8* }`

			define fastcc i8* @"visit_array_aux<`Reference>"(%0 %arg, i32 %arg1) nounwind {
			`fail: ; preds = %entry`
			%tmp20 = tail call fastcc i8* @"visit_array_aux<`Reference>"(%0 %arg, i32 undef) ; <i8*> [#uses=1]
Fall back to the selection dag isel to select tail calls. This shouldn't affect codegen for -O0 compiles as tail call markers are not emitted in unoptimized compiles. Testing with the external/internal nightly test suite reveals no change in compile time performance. Testing with -O1, -O2 and -O3 with fast-isel enabled did not cause any compile-time or execution-time failures. All tests were performed on my x86 machine. I'll monitor our arm testers to ensure no regressions occur there. In an upcoming clang patch I will be marking the objc_autoreleaseReturnValue and objc_retainAutoreleaseReturnValue as tail calls unconditionally. While it's theoretically true that this is just an optimization, it's an optimization that we very much want to happen even at -O0, or else ARC applications become substantially harder to debug. Part of rdar://12553082 llvm-svn: 169796 2012-12-11 01:18:02 +01:00			; CHECK: jmp "_visit_array_aux<`Reference>" ## TAILCALL
Fix fast-isel to avoid selecting the return instruction if a tail call has been encountered. llvm-svn: 89444 2009-11-20 03:51:26 +01:00			`ret i8* %tmp20`
			`}`
Completely disable tail calls when fast-isel is enabled, as fast-isel doesn't currently support dealing with this. llvm-svn: 112341 2010-08-28 02:51:03 +02:00
			`define i32 @foo() nounwind {`
			`entry:`
			`%0 = tail call i32 (...)* @bar() nounwind ; <i32> [#uses=1]`
			`ret i32 %0`
			`}`

			`declare i32 @bar(...) nounwind`