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https://github.com/c64scene-ar/llvm-6502.git
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b720a3d15c
-- This patch enables LLVM to emit Win64-native unwind info rather than DWARF CFI. It handles all corner cases (I hope), including stack realignment. Because the unwind info is not flexible enough to describe stack frames with a gap of unknown size in the middle, such as the one caused by stack realignment, I modified register spilling code to place all spills into the fixed frame slots, so that they can be accessed relative to the frame pointer. Patch by Vadim Chugunov! Reviewed By: rnk Differential Revision: http://reviews.llvm.org/D4081 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211691 91177308-0d34-0410-b5e6-96231b3b80d8
171 lines
4.1 KiB
LLVM
171 lines
4.1 KiB
LLVM
; RUN: llc < %s -O0 -mcpu=corei7 -mtriple=x86_64-pc-win32 | FileCheck %s -check-prefix=WIN64
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; RUN: llc < %s -O0 -mcpu=corei7 -mtriple=x86_64-pc-mingw32 | FileCheck %s -check-prefix=WIN64
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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: .seh_proc foo0
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; WIN64: .seh_endprologue
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; WIN64: ret
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; WIN64: .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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; WIN64: subq $4000, %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: movabsq $8000, %rax
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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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; Checks stack push
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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, i32* %a
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store i32 %b_arg, i32* %b
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store i32 %c_arg, i32* %c
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store i32 %d_arg, i32* %d
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store i32 %e_arg, i32* %e
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store i32 %f_arg, i32* %f
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%tmp = load i32* %a
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%tmp1 = mul i32 %tmp, 2
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%tmp2 = load i32* %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* %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* %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* %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* %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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; WIN64: pushq %rsi
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; WIN64: .seh_pushreg 6
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; WIN64: subq $24, %rsp
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; WIN64: .seh_stackalloc 24
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; WIN64: .seh_endprologue
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; WIN64: addq $24, %rsp
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; WIN64: popq %rsi
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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, i8*, i8*)
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declare void @_d_eh_resume_unwind(i8*)
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declare i32 @bar()
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define i32 @foo4() #0 {
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entry:
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%step = alloca i32, align 4
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store i32 0, i32* %step
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%tmp = load i32* %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, i32* %step
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br label %endtryfinally
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landingpad:
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%landing_pad = landingpad { i8*, i32 } personality i32 (i32, i32, i64, i8*, i8*)* @_d_eh_personality
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cleanup
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%tmp3 = extractvalue { i8*, i32 } %landing_pad, 0
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store i32 2, i32* %step
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call void @_d_eh_resume_unwind(i8* %tmp3)
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unreachable
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endtryfinally:
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%tmp10 = load i32* %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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; WIN64: subq $56, %rsp
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; WIN64: .seh_stackalloc 56
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; WIN64: .seh_endprologue
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; WIN64: addq $56, %rsp
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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 5
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; WIN64: movq %rsp, %rbp
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; WIN64: pushq %rdi
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; WIN64: .seh_pushreg 7
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; WIN64: pushq %rbx
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; WIN64: .seh_pushreg 3
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; WIN64: andq $-64, %rsp
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; WIN64: subq $128, %rsp
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; WIN64: .seh_stackalloc 48
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; WIN64: .seh_setframe 5, 64
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; WIN64: movaps %xmm7, -32(%rbp) # 16-byte Spill
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; WIN64: movaps %xmm6, -48(%rbp) # 16-byte Spill
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; WIN64: .seh_savexmm 6, 16
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; WIN64: .seh_savexmm 7, 32
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; WIN64: .seh_endprologue
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; WIN64: movaps -48(%rbp), %xmm6 # 16-byte Reload
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; WIN64: movaps -32(%rbp), %xmm7 # 16-byte Reload
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; WIN64: leaq -16(%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: retq
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; WIN64: .seh_endproc
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