b3458fdec5
Windows x64 Unwind V2 adds epilog information to unwind data: specifically, the length of the epilog and the offset of each epilog. The first step to do this is to add markers to the beginning and end of each epilog when generating Windows x64 code. I've modelled this after how LLVM was marking ARM and AArch64 epilogs in Windows (and unified the code between the three).
176 lines
4.4 KiB
LLVM
176 lines
4.4 KiB
LLVM
; RUN: llc < %s -O0 -mattr=sse2 -mtriple=x86_64-pc-windows-itanium | FileCheck %s -check-prefix=WIN64 -check-prefix=NORM
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; RUN: llc < %s -O0 -mattr=sse2 -mtriple=x86_64-pc-mingw32 | FileCheck %s -check-prefix=WIN64 -check-prefix=NORM
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; RUN: llc < %s -O0 -mattr=sse2 -mtriple=x86_64-pc-mingw32 -mcpu=atom | FileCheck %s -check-prefix=WIN64 -check-prefix=ATOM
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; Check function without prolog
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define void @foo0() uwtable {
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entry:
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ret void
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}
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; WIN64-LABEL: foo0:
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; WIN64-NOT: .seh_proc foo0
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; WIN64-NOT: .seh_endprologue
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; WIN64: ret
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; WIN64-NOT: .seh_endproc
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; Checks a small stack allocation
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define void @foo1() uwtable {
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entry:
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%baz = alloca [2000 x i16], align 2
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ret void
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}
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; WIN64-LABEL: foo1:
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; WIN64: .seh_proc foo1
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; NORM: subq $4000, %rsp
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; ATOM: leaq -4000(%rsp), %rsp
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; WIN64: .seh_stackalloc 4000
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; WIN64: .seh_endprologue
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; WIN64: addq $4000, %rsp
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; WIN64: ret
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; WIN64: .seh_endproc
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; Checks a stack allocation requiring call to __chkstk/___chkstk_ms
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define void @foo2() uwtable {
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entry:
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%baz = alloca [4000 x i16], align 2
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ret void
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}
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; WIN64-LABEL: foo2:
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; WIN64: .seh_proc foo2
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; WIN64: movl $8000, %eax
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; WIN64: callq {{__chkstk|___chkstk_ms}}
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; WIN64: subq %rax, %rsp
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; WIN64: .seh_stackalloc 8000
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; WIN64: .seh_endprologue
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; WIN64: addq $8000, %rsp
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; WIN64: ret
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; WIN64: .seh_endproc
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define i32 @foo3(i32 %f_arg, i32 %e_arg, i32 %d_arg, i32 %c_arg, i32 %b_arg, i32 %a_arg) uwtable {
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entry:
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%a = alloca i32
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%b = alloca i32
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%c = alloca i32
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%d = alloca i32
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%e = alloca i32
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%f = alloca i32
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store i32 %a_arg, ptr %a
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store i32 %b_arg, ptr %b
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store i32 %c_arg, ptr %c
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store i32 %d_arg, ptr %d
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store i32 %e_arg, ptr %e
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store i32 %f_arg, ptr %f
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%tmp = load i32, ptr %a
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%tmp1 = mul i32 %tmp, 2
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%tmp2 = load i32, ptr %b
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%tmp3 = mul i32 %tmp2, 3
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%tmp4 = add i32 %tmp1, %tmp3
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%tmp5 = load i32, ptr %c
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%tmp6 = mul i32 %tmp5, 5
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%tmp7 = add i32 %tmp4, %tmp6
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%tmp8 = load i32, ptr %d
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%tmp9 = mul i32 %tmp8, 7
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%tmp10 = add i32 %tmp7, %tmp9
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%tmp11 = load i32, ptr %e
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%tmp12 = mul i32 %tmp11, 11
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%tmp13 = add i32 %tmp10, %tmp12
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%tmp14 = load i32, ptr %f
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%tmp15 = mul i32 %tmp14, 13
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%tmp16 = add i32 %tmp13, %tmp15
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ret i32 %tmp16
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}
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; WIN64-LABEL: foo3:
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; WIN64: .seh_proc foo3
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; NORM: subq $16, %rsp
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; ATOM: leaq -16(%rsp), %rsp
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; WIN64: .seh_stackalloc 16
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; WIN64: .seh_endprologue
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; WIN64: addq $16, %rsp
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; WIN64: ret
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; WIN64: .seh_endproc
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; Check emission of eh handler and handler data
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declare i32 @_d_eh_personality(i32, i32, i64, ptr, ptr)
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declare void @_d_eh_resume_unwind(ptr)
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declare i32 @bar()
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define i32 @foo4() #0 personality ptr @_d_eh_personality {
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entry:
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%step = alloca i32, align 4
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store i32 0, ptr %step
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%tmp = load i32, ptr %step
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%tmp1 = invoke i32 @bar()
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to label %finally unwind label %landingpad
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finally:
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store i32 1, ptr %step
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br label %endtryfinally
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landingpad:
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%landing_pad = landingpad { ptr, i32 }
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cleanup
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%tmp3 = extractvalue { ptr, i32 } %landing_pad, 0
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store i32 2, ptr %step
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call void @_d_eh_resume_unwind(ptr %tmp3)
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unreachable
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endtryfinally:
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%tmp10 = load i32, ptr %step
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ret i32 %tmp10
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}
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; WIN64-LABEL: foo4:
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; WIN64: .seh_proc foo4
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; WIN64: .seh_handler _d_eh_personality, @unwind, @except
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; NORM: subq $40, %rsp
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; ATOM: leaq -40(%rsp), %rsp
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; WIN64: .seh_stackalloc 40
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; WIN64: .seh_endprologue
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; WIN64: .seh_startepilogue
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; WIN64: addq $40, %rsp
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; WIN64: .seh_endepilogue
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; WIN64: ret
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; WIN64: .seh_handlerdata
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; WIN64: .seh_endproc
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; Check stack re-alignment and xmm spilling
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define void @foo5() uwtable {
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entry:
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%s = alloca i32, align 64
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call void asm sideeffect "", "~{rbx},~{rdi},~{xmm6},~{xmm7}"()
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ret void
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}
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; WIN64-LABEL: foo5:
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; WIN64: .seh_proc foo5
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; WIN64: pushq %rbp
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; WIN64: .seh_pushreg %rbp
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; WIN64: pushq %rdi
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; WIN64: .seh_pushreg %rdi
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; WIN64: pushq %rbx
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; WIN64: .seh_pushreg %rbx
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; NORM: subq $96, %rsp
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; ATOM: leaq -96(%rsp), %rsp
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; WIN64: .seh_stackalloc 96
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; WIN64: leaq 96(%rsp), %rbp
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; WIN64: .seh_setframe %rbp, 96
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; WIN64: movaps %xmm7, -16(%rbp) # 16-byte Spill
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; WIN64: .seh_savexmm %xmm7, 80
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; WIN64: movaps %xmm6, -32(%rbp) # 16-byte Spill
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; WIN64: .seh_savexmm %xmm6, 64
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; WIN64: .seh_endprologue
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; WIN64: andq $-64, %rsp
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; WIN64: movaps -32(%rbp), %xmm6 # 16-byte Reload
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; WIN64: movaps -16(%rbp), %xmm7 # 16-byte Reload
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; WIN64: .seh_startepilogue
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; WIN64: movq %rbp, %rsp
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; WIN64: popq %rbx
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; WIN64: popq %rdi
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; WIN64: popq %rbp
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; WIN64: .seh_endepilogue
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; WIN64: retq
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; WIN64: .seh_endproc
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