llvm-6502/test/CodeGen/X86/musttail-indirect.ll
Reid Kleckner 5d04e520c0 Don't count inreg params when mangling fastcall functions
This is consistent with MSVC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214981 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-06 18:09:04 +00:00

125 lines
5.0 KiB
LLVM

; 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)*** %1
%2 = load 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 }>*)*** %1
%vfn = getelementptr inbounds i32 (%struct.B*, <{ %struct.A, i32, %struct.A }>*)** %vtable, i32 1
%2 = load 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 }>*)*** %1
%vfn = getelementptr inbounds void (%struct.B*, <{ %struct.A, i32, %struct.A }>*)** %vtable, i32 2
%2 = load 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 }>*)*** %1
%vfn = getelementptr inbounds %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 }>*)** %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)*** %1
%vfn = getelementptr inbounds void (%struct.A*, %struct.B*, i32)** %vtable, i32 4
%2 = load 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 }>* %0, i32 0, i32 0
%this = load %struct.B** %this_ptr
%1 = bitcast %struct.B* %this to i32 (<{ %struct.B*, %struct.A }>*)***
%vtable = load i32 (<{ %struct.B*, %struct.A }>*)*** %1
%vfn = getelementptr inbounds i32 (<{ %struct.B*, %struct.A }>*)** %vtable, i32 1
%2 = load 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@4:
; 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 }>*)*** %1
%vfn = getelementptr inbounds i32 (%struct.B*, <{ %struct.A }>*)** %vtable, i32 1
%2 = load i32 (%struct.B*, <{ %struct.A }>*)** %vfn
%3 = musttail call x86_fastcallcc i32 %2(%struct.B* inreg %this, <{ %struct.A }>* inalloca %0)
ret i32 %3
}