1 files changed, 118 insertions, 0 deletions
diff --git a/test/CodeGen/X86/frameescape.ll b/test/CodeGen/X86/frameescape.ll
new file mode 100644
index 0000000..40eeb0e
--- /dev/null
+++ b/test/CodeGen/X86/frameescape.ll
@@ -0,0 +1,118 @@
+; RUN: llc -mtriple=i686-windows-msvc < %s | FileCheck %s --check-prefix=X86
+; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s --check-prefix=X64
+
+declare void @llvm.frameescape(...)
+declare i8* @llvm.frameaddress(i32)
+declare i8* @llvm.framerecover(i8*, i8*, i32)
+declare i32 @printf(i8*, ...)
+
+@str = internal constant [10 x i8] c"asdf: %d\0A\00"
+
+define void @print_framealloc_from_fp(i8* %fp) {
+  %a.i8 = call i8* @llvm.framerecover(i8* bitcast (void()* @alloc_func to i8*), i8* %fp, i32 0)
+  %a = bitcast i8* %a.i8 to i32*
+  %a.val = load i32, i32* %a
+  call i32 (i8*, ...)* @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %a.val)
+  %b.i8 = call i8* @llvm.framerecover(i8* bitcast (void()* @alloc_func to i8*), i8* %fp, i32 1)
+  %b = bitcast i8* %b.i8 to i32*
+  %b.val = load i32, i32* %b
+  call i32 (i8*, ...)* @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %b.val)
+  store i32 42, i32* %b
+  ret void
+}
+
+; X64-LABEL: print_framealloc_from_fp:
+; X64: movq %rcx, %[[parent_fp:[a-z]+]]
+; X64: movl .Lalloc_func$frame_escape_0(%[[parent_fp]]), %edx
+; X64: leaq {{.*}}(%rip), %[[str:[a-z]+]]
+; X64: movq %[[str]], %rcx
+; X64: callq printf
+; X64: movl .Lalloc_func$frame_escape_1(%[[parent_fp]]), %edx
+; X64: movq %[[str]], %rcx
+; X64: callq printf
+; X64: movl    $42, .Lalloc_func$frame_escape_1(%[[parent_fp]])
+; X64: retq
+
+; X86-LABEL: print_framealloc_from_fp:
+; X86: pushl   %esi
+; X86: subl    $8, %esp
+; X86: movl    16(%esp), %esi
+; X86: movl    _Lalloc_func$frame_escape_0(%esi), %eax
+; X86: movl    %eax, 4(%esp)
+; X86: movl    $_str, (%esp)
+; X86: calll   _printf
+; X86: movl    _Lalloc_func$frame_escape_1(%esi), %eax
+; X86: movl    %eax, 4(%esp)
+; X86: movl    $_str, (%esp)
+; X86: calll   _printf
+; X86: movl    $42, _Lalloc_func$frame_escape_1(%esi)
+; X86: addl    $8, %esp
+; X86: popl    %esi
+; X86: retl
+
+define void @alloc_func() {
+  %a = alloca i32
+  %b = alloca i32
+  call void (...)* @llvm.frameescape(i32* %a, i32* %b)
+  store i32 42, i32* %a
+  store i32 13, i32* %b
+  %fp = call i8* @llvm.frameaddress(i32 0)
+  call void @print_framealloc_from_fp(i8* %fp)
+  ret void
+}
+
+; X64-LABEL: alloc_func:
+; X64: subq    $48, %rsp
+; X64: .seh_stackalloc 48
+; X64: leaq    48(%rsp), %rbp
+; X64: .seh_setframe 5, 48
+; X64: .Lalloc_func$frame_escape_0 = 44
+; X64: .Lalloc_func$frame_escape_1 = 40
+; X64: movl $42, -4(%rbp)
+; X64: movl $13, -8(%rbp)
+; X64: leaq    -48(%rbp), %rcx
+; X64: callq print_framealloc_from_fp
+; X64: retq
+
+; X86-LABEL: alloc_func:
+; X86: pushl   %ebp
+; X86: movl    %esp, %ebp
+; X86: subl    $12, %esp
+; X86: Lalloc_func$frame_escape_0 = -4
+; X86: Lalloc_func$frame_escape_1 = -8
+; X86: movl    $42, -4(%ebp)
+; X86: movl    $13, -8(%ebp)
+; X86: movl    %ebp, (%esp)
+; X86: calll   _print_framealloc_from_fp
+; X86: addl    $12, %esp
+; X86: popl    %ebp
+; X86: retl
+
+; Helper to make this a complete program so it can be compiled and tested.
+define i32 @main() {
+  call void @alloc_func()
+  ret i32 0
+}
+
+define void @alloc_func_no_frameaddr() {
+  %a = alloca i32
+  %b = alloca i32
+  call void (...)* @llvm.frameescape(i32* %a, i32* %b)
+  store i32 42, i32* %a
+  store i32 13, i32* %b
+  call void @print_framealloc_from_fp(i8* null)
+  ret void
+}
+
+; X64-LABEL: alloc_func_no_frameaddr:
+; X64: subq    $40, %rsp
+; X64: .seh_stackalloc 40
+; X64: .seh_endprologue
+; X64: .Lalloc_func_no_frameaddr$frame_escape_0 = 36
+; X64: .Lalloc_func_no_frameaddr$frame_escape_1 = 32
+; X64: movl $42, 36(%rsp)
+; X64: movl $13, 32(%rsp)
+; X64: xorl %ecx, %ecx
+; X64: callq print_framealloc_from_fp
+; X64: addq $40, %rsp
+; X64: retq