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view llvm/test/Transforms/GlobalOpt/musttail_cc.ll @ 201:a96fbbdf2d0f

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Fri, 04 Jun 2021 21:07:06 +0900
parents 1d019706d866
children c4bab56944e8
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; RUN: opt < %s -globalopt -S | FileCheck %s
; PR36546

; Check that musttail callee preserves its calling convention

define i32 @test(i32 %a) {
  ; CHECK: %ca = musttail call i32 @foo(i32 %a)
  %ca = musttail call i32 @foo(i32 %a)
  ret i32 %ca
}

; CHECK-LABEL: define internal i32 @foo(i32 %a)
define internal i32 @foo(i32 %a) {
  ret i32 %a
}

; Check that musttail caller preserves its calling convention

define i32 @test2(i32 %a) {
  %ca = call i32 @foo1(i32 %a)
  ret i32 %ca
}

; CHECK-LABEL: define internal i32 @foo1(i32 %a)
define internal i32 @foo1(i32 %a) {
  ; CHECK: %ca = musttail call i32 @foo2(i32 %a)
  %ca = musttail call i32 @foo2(i32 %a)
  ret i32 %ca
}

; CHECK-LABEL: define internal i32 @foo2(i32 %a)
define internal i32 @foo2(i32 %a) {
  ret i32 %a
}