198 lines
11 KiB
LLVM
198 lines
11 KiB
LLVM
|
; RUN: llc -verify-machineinstrs < %s -mtriple=i686-win32 | FileCheck %s
|
||
|
|
; RUN: llc -verify-machineinstrs < %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
|
||
|
|
}
|
||
|
|
|
||
|
|
; Preallocated thunks shouldn't require any stores to the stack.
|
||
|
|
; CHECK-LABEL: g_thunk_preallocated:
|
||
|
|
; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}}
|
||
|
|
; CHECK: jmpl
|
||
|
|
; CHECK-NOT: ret
|
||
|
|
define x86_thiscallcc i32 @g_thunk_preallocated(%struct.B* %this, <{ %struct.A, i32, %struct.A }>* preallocated(<{ %struct.A, i32, %struct.A }>)) {
|
||
|
|
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 }>* preallocated(<{ %struct.A, i32, %struct.A }>) %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: h_thunk_preallocated:
|
||
|
|
; CHECK: jmpl
|
||
|
|
; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}}
|
||
|
|
; CHECK-NOT: ret
|
||
|
|
define x86_thiscallcc void @h_thunk_preallocated(%struct.B* %this, <{ %struct.A, i32, %struct.A }>* preallocated(<{ %struct.A, i32, %struct.A }>)) {
|
||
|
|
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 }>* preallocated(<{ %struct.A, i32, %struct.A }>) %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: i_thunk_preallocated:
|
||
|
|
; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}}
|
||
|
|
; CHECK: jmpl
|
||
|
|
; CHECK-NOT: ret
|
||
|
|
define x86_thiscallcc %struct.A* @i_thunk_preallocated(%struct.B* %this, <{ %struct.A*, %struct.A, i32, %struct.A }>* preallocated(<{ %struct.A*, %struct.A, i32, %struct.A }>)) {
|
||
|
|
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 }>* preallocated(<{ %struct.A*, %struct.A, i32, %struct.A }>) %0)
|
||
|
|
ret %struct.A* %3
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: j_thunk:
|
||
|
|
; CHECK: jmpl
|
||
|
|
; CHECK-NOT: ret
|
||
|
|
define x86_thiscallcc void @j_thunk(%struct.A* noalias sret(%struct.A) %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(%struct.A) %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: _stdcall_thunk_preallocated@8:
|
||
|
|
; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}}
|
||
|
|
; CHECK: jmpl
|
||
|
|
; CHECK-NOT: ret
|
||
|
|
define x86_stdcallcc i32 @stdcall_thunk_preallocated(<{ %struct.B*, %struct.A }>* preallocated(<{ %struct.B*, %struct.A }>)) {
|
||
|
|
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 }>* preallocated(<{ %struct.B*, %struct.A }>) %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
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: @fastcall_thunk_preallocated@8:
|
||
|
|
; CHECK-NOT: mov %{{.*}}, {{.*(.*esp.*)}}
|
||
|
|
; CHECK: jmpl
|
||
|
|
; CHECK-NOT: ret
|
||
|
|
define x86_fastcallcc i32 @fastcall_thunk_preallocated(%struct.B* inreg %this, <{ %struct.A }>* preallocated(<{ %struct.A }>)) {
|
||
|
|
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 }>* preallocated(<{ %struct.A }>) %0)
|
||
|
|
ret i32 %3
|
||
|
|
}
|