llvm-6502/test/CodeGen/X86/tailcall-64.ll
Chris Lattner f59e4e3452 enhance the logic for looking through tailcalls to look through transparent casts
in multiple-return value scenarios, like what happens on X86-64 when returning
small structs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157800 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 05:29:15 +00:00

90 lines
2.0 KiB
LLVM

; RUN: llc < %s | FileCheck %s
target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin11.4.0"
declare i64 @testi()
define i64 @test_trivial() {
%A = tail call i64 @testi()
ret i64 %A
}
; CHECK: test_trivial:
; CHECK: jmp _testi ## TAILCALL
define i64 @test_noop_bitcast() {
%A = tail call i64 @testi()
%B = bitcast i64 %A to i64
ret i64 %B
}
; CHECK: test_noop_bitcast:
; CHECK: jmp _testi ## TAILCALL
; Tail call shouldn't be blocked by no-op inttoptr.
define i8* @test_inttoptr() {
%A = tail call i64 @testi()
%B = inttoptr i64 %A to i8*
ret i8* %B
}
; CHECK: test_inttoptr:
; CHECK: jmp _testi ## TAILCALL
declare <4 x float> @testv()
define <4 x i32> @test_vectorbitcast() {
%A = tail call <4 x float> @testv()
%B = bitcast <4 x float> %A to <4 x i32>
ret <4 x i32> %B
}
; CHECK: test_vectorbitcast:
; CHECK: jmp _testv ## TAILCALL
declare { i64, i64 } @testp()
define {i64, i64} @test_pair_trivial() {
%A = tail call { i64, i64} @testp()
ret { i64, i64} %A
}
; CHECK: test_pair_trivial:
; CHECK: jmp _testp ## TAILCALL
define {i64, i64} @test_pair_trivial_extract() {
%A = tail call { i64, i64} @testp()
%x = extractvalue { i64, i64} %A, 0
%y = extractvalue { i64, i64} %A, 1
%b = insertvalue {i64, i64} undef, i64 %x, 0
%c = insertvalue {i64, i64} %b, i64 %y, 1
ret { i64, i64} %c
}
; CHECK: test_pair_trivial_extract:
; CHECK: jmp _testp ## TAILCALL
define {i8*, i64} @test_pair_conv_extract() {
%A = tail call { i64, i64} @testp()
%x = extractvalue { i64, i64} %A, 0
%y = extractvalue { i64, i64} %A, 1
%x1 = inttoptr i64 %x to i8*
%b = insertvalue {i8*, i64} undef, i8* %x1, 0
%c = insertvalue {i8*, i64} %b, i64 %y, 1
ret { i8*, i64} %c
}
; CHECK: test_pair_conv_extract:
; CHECK: jmp _testp ## TAILCALL