| ; RUN: llc < %s -mtriple=i686-win32 | FileCheck %s |
| ; RUN: llc < %s -mtriple=i686-win32 -O0 | FileCheck %s |
| |
| ; IR simplified from the following C++ snippet compiled for i686-windows-msvc: |
| |
| ; struct A { A(); ~A(); int a; }; |
| ; |
| ; struct B { |
| ; virtual int f(int); |
| ; virtual int g(A, int, A); |
| ; virtual void h(A, int, A); |
| ; virtual A i(A, int, A); |
| ; virtual A j(int); |
| ; }; |
| ; |
| ; int (B::*mp_f)(int) = &B::f; |
| ; int (B::*mp_g)(A, int, A) = &B::g; |
| ; void (B::*mp_h)(A, int, A) = &B::h; |
| ; A (B::*mp_i)(A, int, A) = &B::i; |
| ; A (B::*mp_j)(int) = &B::j; |
| |
| ; Each member pointer creates a thunk. The ones with inalloca are required to |
| ; tail calls by the ABI, even at O0. |
| |
| %struct.B = type { i32 (...)** } |
| %struct.A = type { i32 } |
| |
| ; CHECK-LABEL: f_thunk: |
| ; CHECK: jmpl |
| ; CHECK-NOT: ret |
| define x86_thiscallcc i32 @f_thunk(%struct.B* %this, i32) { |
| entry: |
| %1 = bitcast %struct.B* %this to i32 (%struct.B*, i32)*** |
| %vtable = load i32 (%struct.B*, i32)**, i32 (%struct.B*, i32)*** %1 |
| %2 = load i32 (%struct.B*, i32)*, i32 (%struct.B*, i32)** %vtable |
| %3 = musttail call x86_thiscallcc i32 %2(%struct.B* %this, i32 %0) |
| ret i32 %3 |
| } |
| |
| ; Inalloca thunks shouldn't require any stores to the stack. |
| ; CHECK-LABEL: g_thunk: |
| ; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}} |
| ; CHECK: jmpl |
| ; CHECK-NOT: ret |
| define x86_thiscallcc i32 @g_thunk(%struct.B* %this, <{ %struct.A, i32, %struct.A }>* inalloca) { |
| entry: |
| %1 = bitcast %struct.B* %this to i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*** |
| %vtable = load i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)**, i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*** %1 |
| %vfn = getelementptr inbounds i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*, i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)** %vtable, i32 1 |
| %2 = load i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*, i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)** %vfn |
| %3 = musttail call x86_thiscallcc i32 %2(%struct.B* %this, <{ %struct.A, i32, %struct.A }>* inalloca %0) |
| ret i32 %3 |
| } |
| |
| ; CHECK-LABEL: h_thunk: |
| ; CHECK: jmpl |
| ; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}} |
| ; CHECK-NOT: ret |
| define x86_thiscallcc void @h_thunk(%struct.B* %this, <{ %struct.A, i32, %struct.A }>* inalloca) { |
| entry: |
| %1 = bitcast %struct.B* %this to void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*** |
| %vtable = load void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)**, void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*** %1 |
| %vfn = getelementptr inbounds void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*, void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)** %vtable, i32 2 |
| %2 = load void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)*, void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)** %vfn |
| musttail call x86_thiscallcc void %2(%struct.B* %this, <{ %struct.A, i32, %struct.A }>* inalloca %0) |
| ret void |
| } |
| |
| ; CHECK-LABEL: i_thunk: |
| ; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}} |
| ; CHECK: jmpl |
| ; CHECK-NOT: ret |
| define x86_thiscallcc %struct.A* @i_thunk(%struct.B* %this, <{ %struct.A*, %struct.A, i32, %struct.A }>* inalloca) { |
| entry: |
| %1 = bitcast %struct.B* %this to %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)*** |
| %vtable = load %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)**, %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)*** %1 |
| %vfn = getelementptr inbounds %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)*, %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)** %vtable, i32 3 |
| %2 = load %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)*, %struct.A* (%struct.B*, <{ %struct.A*, %struct.A, i32, %struct.A }>*)** %vfn |
| %3 = musttail call x86_thiscallcc %struct.A* %2(%struct.B* %this, <{ %struct.A*, %struct.A, i32, %struct.A }>* inalloca %0) |
| ret %struct.A* %3 |
| } |
| |
| ; CHECK-LABEL: j_thunk: |
| ; CHECK: jmpl |
| ; CHECK-NOT: ret |
| define x86_thiscallcc void @j_thunk(%struct.A* noalias sret %agg.result, %struct.B* %this, i32) { |
| entry: |
| %1 = bitcast %struct.B* %this to void (%struct.A*, %struct.B*, i32)*** |
| %vtable = load void (%struct.A*, %struct.B*, i32)**, void (%struct.A*, %struct.B*, i32)*** %1 |
| %vfn = getelementptr inbounds void (%struct.A*, %struct.B*, i32)*, void (%struct.A*, %struct.B*, i32)** %vtable, i32 4 |
| %2 = load void (%struct.A*, %struct.B*, i32)*, void (%struct.A*, %struct.B*, i32)** %vfn |
| musttail call x86_thiscallcc void %2(%struct.A* sret %agg.result, %struct.B* %this, i32 %0) |
| ret void |
| } |
| |
| ; CHECK-LABEL: _stdcall_thunk@8: |
| ; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}} |
| ; CHECK: jmpl |
| ; CHECK-NOT: ret |
| define x86_stdcallcc i32 @stdcall_thunk(<{ %struct.B*, %struct.A }>* inalloca) { |
| entry: |
| %this_ptr = getelementptr inbounds <{ %struct.B*, %struct.A }>, <{ %struct.B*, %struct.A }>* %0, i32 0, i32 0 |
| %this = load %struct.B*, %struct.B** %this_ptr |
| %1 = bitcast %struct.B* %this to i32 (<{ %struct.B*, %struct.A }>*)*** |
| %vtable = load i32 (<{ %struct.B*, %struct.A }>*)**, i32 (<{ %struct.B*, %struct.A }>*)*** %1 |
| %vfn = getelementptr inbounds i32 (<{ %struct.B*, %struct.A }>*)*, i32 (<{ %struct.B*, %struct.A }>*)** %vtable, i32 1 |
| %2 = load i32 (<{ %struct.B*, %struct.A }>*)*, i32 (<{ %struct.B*, %struct.A }>*)** %vfn |
| %3 = musttail call x86_stdcallcc i32 %2(<{ %struct.B*, %struct.A }>* inalloca %0) |
| ret i32 %3 |
| } |
| |
| ; CHECK-LABEL: @fastcall_thunk@8: |
| ; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}} |
| ; CHECK: jmpl |
| ; CHECK-NOT: ret |
| define x86_fastcallcc i32 @fastcall_thunk(%struct.B* inreg %this, <{ %struct.A }>* inalloca) { |
| entry: |
| %1 = bitcast %struct.B* %this to i32 (%struct.B*, <{ %struct.A }>*)*** |
| %vtable = load i32 (%struct.B*, <{ %struct.A }>*)**, i32 (%struct.B*, <{ %struct.A }>*)*** %1 |
| %vfn = getelementptr inbounds i32 (%struct.B*, <{ %struct.A }>*)*, i32 (%struct.B*, <{ %struct.A }>*)** %vtable, i32 1 |
| %2 = load i32 (%struct.B*, <{ %struct.A }>*)*, i32 (%struct.B*, <{ %struct.A }>*)** %vfn |
| %3 = musttail call x86_fastcallcc i32 %2(%struct.B* inreg %this, <{ %struct.A }>* inalloca %0) |
| ret i32 %3 |
| } |