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