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).
245 lines
9.6 KiB
LLVM
245 lines
9.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-linux -show-mc-encoding | FileCheck %s --check-prefix=CHECK32
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; RUN: llc < %s -mtriple=x86_64-linux -show-mc-encoding | FileCheck %s --check-prefix=CHECK64
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; RUN: llc < %s -mtriple=x86_64-win32 -show-mc-encoding | FileCheck %s --check-prefix=WIN64
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declare void @foo()
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declare void @bar()
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define void @f(i32 %x, i32 %y) !prof !14 {
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; CHECK32-LABEL: f:
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; CHECK32: # %bb.0: # %entry
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; CHECK32-NEXT: movl {{[0-9]+}}(%esp), %eax # encoding: [0x8b,0x44,0x24,0x04]
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; CHECK32-NEXT: cmpl {{[0-9]+}}(%esp), %eax # encoding: [0x3b,0x44,0x24,0x08]
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; CHECK32-NEXT: jne bar@PLT # TAILCALL
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; CHECK32-NEXT: # encoding: [0x75,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: bar@PLT-1, kind: FK_PCRel_1
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; CHECK32-NEXT: # %bb.1: # %bb1
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; CHECK32-NEXT: jmp foo@PLT # TAILCALL
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; CHECK32-NEXT: # encoding: [0xeb,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: foo@PLT-1, kind: FK_PCRel_1
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;
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; CHECK64-LABEL: f:
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; CHECK64: # %bb.0: # %entry
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; CHECK64-NEXT: cmpl %esi, %edi # encoding: [0x39,0xf7]
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; CHECK64-NEXT: jne bar@PLT # TAILCALL
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; CHECK64-NEXT: # encoding: [0x75,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: bar@PLT-1, kind: FK_PCRel_1
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; CHECK64-NEXT: # %bb.1: # %bb1
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; CHECK64-NEXT: jmp foo@PLT # TAILCALL
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; CHECK64-NEXT: # encoding: [0xeb,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: foo@PLT-1, kind: FK_PCRel_1
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;
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; WIN64-LABEL: f:
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; WIN64: # %bb.0: # %entry
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; WIN64-NEXT: cmpl %edx, %ecx # encoding: [0x39,0xd1]
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; WIN64-NEXT: jne bar # TAILCALL
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; WIN64-NEXT: # encoding: [0x75,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: bar-1, kind: FK_PCRel_1
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; WIN64-NEXT: # %bb.1: # %bb1
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; WIN64-NEXT: jmp foo # TAILCALL
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; WIN64-NEXT: # encoding: [0xeb,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
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entry:
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%p = icmp eq i32 %x, %y
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br i1 %p, label %bb1, label %bb2
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bb1:
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tail call void @foo()
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ret void
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bb2:
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tail call void @bar()
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ret void
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; Check that the asm doesn't just look good, but uses the correct encoding.
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}
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define void @f_non_leaf(i32 %x, i32 %y) !prof !14 {
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; CHECK32-LABEL: f_non_leaf:
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; CHECK32: # %bb.0: # %entry
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; CHECK32-NEXT: pushl %ebx # encoding: [0x53]
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; CHECK32-NEXT: .cfi_def_cfa_offset 8
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; CHECK32-NEXT: .cfi_offset %ebx, -8
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; CHECK32-NEXT: movl {{[0-9]+}}(%esp), %eax # encoding: [0x8b,0x44,0x24,0x08]
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; CHECK32-NEXT: #APP
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; CHECK32-NEXT: #NO_APP
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; CHECK32-NEXT: cmpl {{[0-9]+}}(%esp), %eax # encoding: [0x3b,0x44,0x24,0x0c]
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; CHECK32-NEXT: jne .LBB1_2 # encoding: [0x75,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: .LBB1_2-1, kind: FK_PCRel_1
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; CHECK32-NEXT: # %bb.1: # %bb1
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; CHECK32-NEXT: popl %ebx # encoding: [0x5b]
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; CHECK32-NEXT: .cfi_def_cfa_offset 4
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; CHECK32-NEXT: jmp foo@PLT # TAILCALL
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; CHECK32-NEXT: # encoding: [0xeb,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: foo@PLT-1, kind: FK_PCRel_1
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; CHECK32-NEXT: .LBB1_2: # %bb2
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; CHECK32-NEXT: .cfi_def_cfa_offset 8
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; CHECK32-NEXT: popl %ebx # encoding: [0x5b]
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; CHECK32-NEXT: .cfi_def_cfa_offset 4
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; CHECK32-NEXT: jmp bar@PLT # TAILCALL
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; CHECK32-NEXT: # encoding: [0xeb,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: bar@PLT-1, kind: FK_PCRel_1
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;
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; CHECK64-LABEL: f_non_leaf:
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; CHECK64: # %bb.0: # %entry
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; CHECK64-NEXT: pushq %rbx # encoding: [0x53]
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; CHECK64-NEXT: .cfi_def_cfa_offset 16
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; CHECK64-NEXT: .cfi_offset %rbx, -16
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; CHECK64-NEXT: #APP
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; CHECK64-NEXT: #NO_APP
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; CHECK64-NEXT: cmpl %esi, %edi # encoding: [0x39,0xf7]
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; CHECK64-NEXT: jne .LBB1_2 # encoding: [0x75,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: .LBB1_2-1, kind: FK_PCRel_1
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; CHECK64-NEXT: # %bb.1: # %bb1
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; CHECK64-NEXT: popq %rbx # encoding: [0x5b]
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; CHECK64-NEXT: .cfi_def_cfa_offset 8
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; CHECK64-NEXT: jmp foo@PLT # TAILCALL
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; CHECK64-NEXT: # encoding: [0xeb,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: foo@PLT-1, kind: FK_PCRel_1
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; CHECK64-NEXT: .LBB1_2: # %bb2
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; CHECK64-NEXT: .cfi_def_cfa_offset 16
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; CHECK64-NEXT: popq %rbx # encoding: [0x5b]
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; CHECK64-NEXT: .cfi_def_cfa_offset 8
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; CHECK64-NEXT: jmp bar@PLT # TAILCALL
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; CHECK64-NEXT: # encoding: [0xeb,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: bar@PLT-1, kind: FK_PCRel_1
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;
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; WIN64-LABEL: f_non_leaf:
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; WIN64: # %bb.0: # %entry
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; WIN64-NEXT: pushq %rbx # encoding: [0x53]
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; WIN64-NEXT: .seh_pushreg %rbx
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; WIN64-NEXT: .seh_endprologue
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; WIN64-NEXT: #APP
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; WIN64-NEXT: #NO_APP
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; WIN64-NEXT: cmpl %edx, %ecx # encoding: [0x39,0xd1]
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; WIN64-NEXT: jne .LBB1_2 # encoding: [0x75,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: .LBB1_2-1, kind: FK_PCRel_1
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; WIN64-NEXT: # %bb.1: # %bb1
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; WIN64-NEXT: .seh_startepilogue
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; WIN64-NEXT: popq %rbx # encoding: [0x5b]
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; WIN64-NEXT: .seh_endepilogue
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; WIN64-NEXT: jmp foo # TAILCALL
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; WIN64-NEXT: # encoding: [0xeb,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
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; WIN64-NEXT: .LBB1_2: # %bb2
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; WIN64-NEXT: nop # encoding: [0x90]
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; WIN64-NEXT: .seh_startepilogue
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; WIN64-NEXT: popq %rbx # encoding: [0x5b]
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; WIN64-NEXT: .seh_endepilogue
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; WIN64-NEXT: jmp bar # TAILCALL
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; WIN64-NEXT: # encoding: [0xeb,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: bar-1, kind: FK_PCRel_1
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; WIN64-NEXT: .seh_endproc
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entry:
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; Force %ebx to be spilled on the stack, turning this into
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; not a "leaf" function for Win64.
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tail call void asm sideeffect "", "~{ebx}"()
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%p = icmp eq i32 %x, %y
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br i1 %p, label %bb1, label %bb2
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bb1:
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tail call void @foo()
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ret void
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bb2:
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tail call void @bar()
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ret void
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}
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declare x86_thiscallcc zeroext i1 @baz(ptr, i32)
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define x86_thiscallcc zeroext i1 @BlockPlacementTest(ptr %this, i32 %x) !prof !14 {
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; CHECK32-LABEL: BlockPlacementTest:
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; CHECK32: # %bb.0: # %entry
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; CHECK32-NEXT: movl {{[0-9]+}}(%esp), %edx # encoding: [0x8b,0x54,0x24,0x04]
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; CHECK32-NEXT: testb $42, %dl # encoding: [0xf6,0xc2,0x2a]
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; CHECK32-NEXT: je .LBB2_3 # encoding: [0x74,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: .LBB2_3-1, kind: FK_PCRel_1
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; CHECK32-NEXT: # %bb.1: # %land.rhs
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; CHECK32-NEXT: movb $1, %al # encoding: [0xb0,0x01]
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; CHECK32-NEXT: testb $44, %dl # encoding: [0xf6,0xc2,0x2c]
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; CHECK32-NEXT: je baz@PLT # TAILCALL
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; CHECK32-NEXT: # encoding: [0x74,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: baz@PLT-1, kind: FK_PCRel_1
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; CHECK32-NEXT: .LBB2_2: # %land.end
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; CHECK32-NEXT: # kill: def $al killed $al killed $eax
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; CHECK32-NEXT: retl $4 # encoding: [0xc2,0x04,0x00]
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; CHECK32-NEXT: .LBB2_3:
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; CHECK32-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
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; CHECK32-NEXT: jmp .LBB2_2 # encoding: [0xeb,A]
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; CHECK32-NEXT: # fixup A - offset: 1, value: .LBB2_2-1, kind: FK_PCRel_1
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;
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; CHECK64-LABEL: BlockPlacementTest:
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; CHECK64: # %bb.0: # %entry
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; CHECK64-NEXT: testb $42, %sil # encoding: [0x40,0xf6,0xc6,0x2a]
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; CHECK64-NEXT: je .LBB2_3 # encoding: [0x74,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: .LBB2_3-1, kind: FK_PCRel_1
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; CHECK64-NEXT: # %bb.1: # %land.rhs
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; CHECK64-NEXT: movb $1, %al # encoding: [0xb0,0x01]
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; CHECK64-NEXT: testb $44, %sil # encoding: [0x40,0xf6,0xc6,0x2c]
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; CHECK64-NEXT: je baz@PLT # TAILCALL
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; CHECK64-NEXT: # encoding: [0x74,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: baz@PLT-1, kind: FK_PCRel_1
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; CHECK64-NEXT: .LBB2_2: # %land.end
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; CHECK64-NEXT: # kill: def $al killed $al killed $eax
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; CHECK64-NEXT: retq # encoding: [0xc3]
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; CHECK64-NEXT: .LBB2_3:
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; CHECK64-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
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; CHECK64-NEXT: jmp .LBB2_2 # encoding: [0xeb,A]
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; CHECK64-NEXT: # fixup A - offset: 1, value: .LBB2_2-1, kind: FK_PCRel_1
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;
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; WIN64-LABEL: BlockPlacementTest:
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; WIN64: # %bb.0: # %entry
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; WIN64-NEXT: testb $42, %dl # encoding: [0xf6,0xc2,0x2a]
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; WIN64-NEXT: je .LBB2_3 # encoding: [0x74,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: .LBB2_3-1, kind: FK_PCRel_1
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; WIN64-NEXT: # %bb.1: # %land.rhs
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; WIN64-NEXT: movb $1, %al # encoding: [0xb0,0x01]
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; WIN64-NEXT: testb $44, %dl # encoding: [0xf6,0xc2,0x2c]
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; WIN64-NEXT: je baz # TAILCALL
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; WIN64-NEXT: # encoding: [0x74,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: baz-1, kind: FK_PCRel_1
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; WIN64-NEXT: .LBB2_2: # %land.end
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; WIN64-NEXT: # kill: def $al killed $al killed $eax
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; WIN64-NEXT: retq # encoding: [0xc3]
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; WIN64-NEXT: .LBB2_3:
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; WIN64-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
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; WIN64-NEXT: jmp .LBB2_2 # encoding: [0xeb,A]
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; WIN64-NEXT: # fixup A - offset: 1, value: .LBB2_2-1, kind: FK_PCRel_1
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entry:
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%and = and i32 %x, 42
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%tobool = icmp eq i32 %and, 0
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br i1 %tobool, label %land.end, label %land.rhs
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land.rhs:
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%and6 = and i32 %x, 44
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%tobool7 = icmp eq i32 %and6, 0
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br i1 %tobool7, label %lor.rhs, label %land.end
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lor.rhs:
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%call = tail call x86_thiscallcc zeroext i1 @baz(ptr %this, i32 %x) #2
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br label %land.end
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land.end:
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%0 = phi i1 [ false, %entry ], [ true, %land.rhs ], [ %call, %lor.rhs ]
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ret i1 %0
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; Make sure machine block placement isn't confused by the conditional tail call,
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; but sees that it can fall through to the next block.
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"ProfileSummary", !1}
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!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
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!2 = !{!"ProfileFormat", !"InstrProf"}
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!3 = !{!"TotalCount", i64 10000}
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!4 = !{!"MaxCount", i64 10}
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!5 = !{!"MaxInternalCount", i64 1}
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!6 = !{!"MaxFunctionCount", i64 1000}
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!7 = !{!"NumCounts", i64 3}
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!8 = !{!"NumFunctions", i64 3}
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!9 = !{!"DetailedSummary", !10}
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!10 = !{!11, !12, !13}
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!11 = !{i32 10000, i64 100, i32 1}
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!12 = !{i32 999000, i64 100, i32 1}
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!13 = !{i32 999999, i64 1, i32 2}
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!14 = !{!"function_entry_count", i64 0}
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