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; RUN: opt < %s -passes=deadargelim -S | FileCheck %s
@g0 = global i8 0, align 8
; CHECK-NOT: DEAD
; Dead arg only used by dead retval
define internal i32 @test(i32 %DEADARG) {
ret i32 %DEADARG
}
define i32 @test2(i32 %A) {
%DEAD = call i32 @test( i32 %A ) ; <i32> [#uses=0]
ret i32 123
}
define i32 @test3() {
%X = call i32 @test2( i32 3232 ) ; <i32> [#uses=1]
%Y = add i32 %X, -123 ; <i32> [#uses=1]
ret i32 %Y
}
; The callee function's return type shouldn't be changed if the call result is
; used.
; CHECK-LABEL: define internal ptr @callee4()
define internal ptr @callee4(ptr %a0) {
ret ptr @g0;
}
declare void @llvm.objc.clang.arc.noop.use(...)
; CHECK-LABEL: define ptr @test4(
; CHECK: tail call ptr @callee4() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
define ptr @test4() {
%call = tail call ptr @callee4(ptr @g0) [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
call void (...) @llvm.objc.clang.arc.noop.use(ptr %call)
ret ptr @g0
}
declare ptr @llvm.objc.retainAutoreleasedReturnValue(ptr)
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