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11b11d77ee
GCC 4.7 changed the MingW ABI. On the LLVM side it means that sret functions don't pop the stack. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197163 91177308-0d34-0410-b5e6-96231b3b80d8
161 lines
4.6 KiB
LLVM
161 lines
4.6 KiB
LLVM
; We specify -mcpu explicitly to avoid instruction reordering that happens on
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; some setups (e.g., Atom) from affecting the output.
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; RUN: llc < %s -mcpu=core2 -mtriple=i686-pc-win32 | FileCheck %s -check-prefix=WIN32
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; RUN: llc < %s -mcpu=core2 -mtriple=i686-pc-mingw32 | FileCheck %s -check-prefix=MINGW_X86
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; RUN: llc < %s -mcpu=core2 -mtriple=i386-pc-linux | FileCheck %s -check-prefix=LINUX
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; RUN: llc < %s -mcpu=core2 -O0 -mtriple=i686-pc-win32 | FileCheck %s -check-prefix=WIN32
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; RUN: llc < %s -mcpu=core2 -O0 -mtriple=i686-pc-mingw32 | FileCheck %s -check-prefix=MINGW_X86
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; RUN: llc < %s -mcpu=core2 -O0 -mtriple=i386-pc-linux | FileCheck %s -check-prefix=LINUX
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; The SysV ABI used by most Unixes and Mingw on x86 specifies that an sret pointer
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; is callee-cleanup. However, in MSVC's cdecl calling convention, sret pointer
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; arguments are caller-cleanup like normal arguments.
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define void @sret1(i8* sret %x) nounwind {
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entry:
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; WIN32-LABEL: _sret1:
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; WIN32: movb $42, (%eax)
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; WIN32-NOT: popl %eax
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; WIN32: {{ret$}}
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; MINGW_X86-LABEL: _sret1:
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; MINGW_X86: {{ret$}}
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; LINUX-LABEL: sret1:
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; LINUX: ret $4
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store i8 42, i8* %x, align 4
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ret void
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}
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define void @sret2(i8* sret %x, i8 %y) nounwind {
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entry:
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; WIN32-LABEL: _sret2:
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; WIN32: movb {{.*}}, (%eax)
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; WIN32-NOT: popl %eax
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; WIN32: {{ret$}}
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; MINGW_X86-LABEL: _sret2:
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; MINGW_X86: {{ret$}}
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; LINUX-LABEL: sret2:
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; LINUX: ret $4
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store i8 %y, i8* %x
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ret void
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}
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define void @sret3(i8* sret %x, i8* %y) nounwind {
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entry:
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; WIN32-LABEL: _sret3:
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; WIN32: movb $42, (%eax)
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; WIN32-NOT: movb $13, (%eax)
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; WIN32-NOT: popl %eax
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; WIN32: {{ret$}}
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; MINGW_X86-LABEL: _sret3:
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; MINGW_X86: {{ret$}}
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; LINUX-LABEL: sret3:
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; LINUX: ret $4
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store i8 42, i8* %x
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store i8 13, i8* %y
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ret void
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}
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; PR15556
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%struct.S4 = type { i32, i32, i32 }
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define void @sret4(%struct.S4* noalias sret %agg.result) {
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entry:
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; WIN32-LABEL: _sret4:
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; WIN32: movl $42, (%eax)
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; WIN32-NOT: popl %eax
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; WIN32: {{ret$}}
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; MINGW_X86-LABEL: _sret4:
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; MINGW_X86: {{ret$}}
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; LINUX-LABEL: sret4:
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; LINUX: ret $4
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%x = getelementptr inbounds %struct.S4* %agg.result, i32 0, i32 0
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store i32 42, i32* %x, align 4
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ret void
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}
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%struct.S5 = type { i32 }
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%class.C5 = type { i8 }
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define x86_thiscallcc void @"\01?foo@C5@@QAE?AUS5@@XZ"(%struct.S5* noalias sret %agg.result, %class.C5* %this) {
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entry:
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%this.addr = alloca %class.C5*, align 4
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store %class.C5* %this, %class.C5** %this.addr, align 4
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%this1 = load %class.C5** %this.addr
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%x = getelementptr inbounds %struct.S5* %agg.result, i32 0, i32 0
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store i32 42, i32* %x, align 4
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ret void
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; WIN32-LABEL: {{^}}"?foo@C5@@QAE?AUS5@@XZ":
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; MINGW_X86-LABEL: {{^}}"?foo@C5@@QAE?AUS5@@XZ":
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; LINUX-LABEL: {{^}}"?foo@C5@@QAE?AUS5@@XZ":
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; The address of the return structure is passed as an implicit parameter.
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; In the -O0 build, %eax is spilled at the beginning of the function, hence we
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; should match both 4(%esp) and 8(%esp).
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; WIN32: {{[48]}}(%esp), %eax
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; WIN32: movl $42, (%eax)
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; WIN32: ret $4
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}
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define void @call_foo5() {
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entry:
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%c = alloca %class.C5, align 1
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%s = alloca %struct.S5, align 4
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call x86_thiscallcc void @"\01?foo@C5@@QAE?AUS5@@XZ"(%struct.S5* sret %s, %class.C5* %c)
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; WIN32-LABEL: {{^}}_call_foo5:
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; MINGW_X86-LABEL: {{^}}_call_foo5:
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; LINUX-LABEL: {{^}}call_foo5:
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; Load the address of the result and put it onto stack
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; (through %ecx in the -O0 build).
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; WIN32: leal {{[0-9]+}}(%esp), %e{{[a-d]}}x
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; WIN32: movl %e{{[a-d]}}x, (%e{{([a-d]x)|(sp)}})
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; The this pointer goes to ECX.
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; WIN32-NEXT: leal {{[0-9]+}}(%esp), %ecx
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; WIN32-NEXT: calll "?foo@C5@@QAE?AUS5@@XZ"
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; WIN32: ret
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ret void
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}
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%struct.test6 = type { i32, i32, i32 }
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define void @test6_f(%struct.test6* %x) nounwind {
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; WIN32-LABEL: _test6_f:
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; MINGW_X86-LABEL: _test6_f:
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; LINUX-LABEL: test6_f:
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; The %x argument is moved to %ecx. It will be the this pointer.
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; WIN32: movl 8(%ebp), %ecx
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; The %x argument is moved to (%esp). It will be the this pointer. With -O0
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; we copy esp to ecx and use (ecx) instead of (esp).
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; MINGW_X86: movl 8(%ebp), %eax
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; MINGW_X86: movl %eax, (%e{{([a-d]x)|(sp)}})
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; The sret pointer is (%esp)
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; WIN32: leal 8(%esp), %[[REG:e[a-d]x]]
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; WIN32-NEXT: movl %[[REG]], (%e{{([a-d]x)|(sp)}})
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; The sret pointer is %ecx
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; MINGW_X86-NEXT: leal 8(%esp), %ecx
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; MINGW_X86-NEXT: calll _test6_g
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%tmp = alloca %struct.test6, align 4
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call x86_thiscallcc void @test6_g(%struct.test6* sret %tmp, %struct.test6* %x)
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ret void
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}
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declare x86_thiscallcc void @test6_g(%struct.test6* sret, %struct.test6*)
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