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2ca79fdeee
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354705 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
2.9 KiB
LLVM
79 lines
2.9 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
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; Test that the "returned" attribute is optimized effectively.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; CHECK-LABEL: _Z3foov:
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; CHECK-NEXT: .functype _Z3foov () -> (i32){{$}}
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; CHECK-NEXT: i32.const $push0=, 1{{$}}
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; CHECK-NEXT: {{^}} i32.call $push1=, _Znwm, $pop0{{$}}
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; CHECK-NEXT: {{^}} i32.call $push2=, _ZN5AppleC1Ev, $pop1{{$}}
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; CHECK-NEXT: return $pop2{{$}}
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%class.Apple = type { i8 }
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declare noalias i8* @_Znwm(i32)
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declare %class.Apple* @_ZN5AppleC1Ev(%class.Apple* returned)
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define %class.Apple* @_Z3foov() {
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entry:
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%call = tail call noalias i8* @_Znwm(i32 1)
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%0 = bitcast i8* %call to %class.Apple*
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%call1 = tail call %class.Apple* @_ZN5AppleC1Ev(%class.Apple* %0)
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ret %class.Apple* %0
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}
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; CHECK-LABEL: _Z3barPvS_l:
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; CHECK-NEXT: .functype _Z3barPvS_l (i32, i32, i32) -> (i32){{$}}
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; CHECK-NEXT: {{^}} i32.call $push0=, memcpy, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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declare i8* @memcpy(i8* returned, i8*, i32)
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define i8* @_Z3barPvS_l(i8* %p, i8* %s, i32 %n) {
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entry:
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%call = tail call i8* @memcpy(i8* %p, i8* %s, i32 %n)
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ret i8* %p
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}
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; Test that the optimization isn't performed on constant arguments.
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; CHECK-LABEL: test_constant_arg:
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; CHECK: i32.const $push0=, global{{$}}
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; CHECK-NEXT: {{^}} i32.call $drop=, returns_arg, $pop0{{$}}
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; CHECK-NEXT: return{{$}}
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@global = external global i32
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@addr = global i32* @global
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define void @test_constant_arg() {
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%call = call i32* @returns_arg(i32* @global)
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ret void
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}
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declare i32* @returns_arg(i32* returned)
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; Test that the optimization isn't performed on arguments without the
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; "returned" attribute.
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; CHECK-LABEL: test_other_skipped:
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; CHECK-NEXT: .functype test_other_skipped (i32, i32, f64) -> (){{$}}
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; CHECK-NEXT: {{^}} i32.call $drop=, do_something, $0, $1, $2{{$}}
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; CHECK-NEXT: {{^}} call do_something_with_i32, $1{{$}}
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; CHECK-NEXT: {{^}} call do_something_with_double, $2{{$}}
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declare i32 @do_something(i32 returned, i32, double)
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declare void @do_something_with_i32(i32)
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declare void @do_something_with_double(double)
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define void @test_other_skipped(i32 %a, i32 %b, double %c) {
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%call = call i32 @do_something(i32 %a, i32 %b, double %c)
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call void @do_something_with_i32(i32 %b)
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call void @do_something_with_double(double %c)
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ret void
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}
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; Test that the optimization is performed on arguments other than the first.
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; CHECK-LABEL: test_second_arg:
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; CHECK-NEXT: .functype test_second_arg (i32, i32) -> (i32){{$}}
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; CHECK-NEXT: {{^}} i32.call $push0=, do_something_else, $0, $1{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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declare i32 @do_something_else(i32, i32 returned)
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define i32 @test_second_arg(i32 %a, i32 %b) {
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%call = call i32 @do_something_else(i32 %a, i32 %b)
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ret i32 %b
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}
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