| ; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt | FileCheck %s |
| |
| ; Test that the "returned" attribute is optimized effectively. |
| |
| target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" |
| target triple = "wasm32-unknown-unknown" |
| |
| ; CHECK-LABEL: _Z3foov: |
| ; CHECK-NEXT: .result i32{{$}} |
| ; CHECK-NEXT: i32.const $push0=, 1{{$}} |
| ; CHECK-NEXT: {{^}} i32.call $push1=, _Znwm@FUNCTION, $pop0{{$}} |
| ; CHECK-NEXT: {{^}} i32.call $push2=, _ZN5AppleC1Ev@FUNCTION, $pop1{{$}} |
| ; CHECK-NEXT: return $pop2{{$}} |
| %class.Apple = type { i8 } |
| declare noalias i8* @_Znwm(i32) |
| declare %class.Apple* @_ZN5AppleC1Ev(%class.Apple* returned) |
| define %class.Apple* @_Z3foov() { |
| entry: |
| %call = tail call noalias i8* @_Znwm(i32 1) |
| %0 = bitcast i8* %call to %class.Apple* |
| %call1 = tail call %class.Apple* @_ZN5AppleC1Ev(%class.Apple* %0) |
| ret %class.Apple* %0 |
| } |
| |
| ; CHECK-LABEL: _Z3barPvS_l: |
| ; CHECK-NEXT: .param i32, i32, i32{{$}} |
| ; CHECK-NEXT: .result i32{{$}} |
| ; CHECK-NEXT: {{^}} i32.call $push0=, memcpy@FUNCTION, $0, $1, $2{{$}} |
| ; CHECK-NEXT: return $pop0{{$}} |
| declare i8* @memcpy(i8* returned, i8*, i32) |
| define i8* @_Z3barPvS_l(i8* %p, i8* %s, i32 %n) { |
| entry: |
| %call = tail call i8* @memcpy(i8* %p, i8* %s, i32 %n) |
| ret i8* %p |
| } |
| |
| ; Test that the optimization isn't performed on constant arguments. |
| |
| ; CHECK-LABEL: test_constant_arg: |
| ; CHECK-NEXT: i32.const $push0=, global{{$}} |
| ; CHECK-NEXT: {{^}} i32.call $drop=, returns_arg@FUNCTION, $pop0{{$}} |
| ; CHECK-NEXT: return{{$}} |
| @global = external global i32 |
| @addr = global i32* @global |
| define void @test_constant_arg() { |
| %call = call i32* @returns_arg(i32* @global) |
| ret void |
| } |
| declare i32* @returns_arg(i32* returned) |