6fde043951
This is an alternative to D120330, which disables MachineSink for functions with irreducible cycles entirely. This avoids both the correctness problem, and ensures we don't perform non-profitable sinks into cycles. At the same time, it may also disable profitable sinks in the same function. This can be made more precise by using MachineCycleInfo in the future. Fixes https://github.com/llvm/llvm-project/issues/53990. Differential Revision: https://reviews.llvm.org/D120800
261 lines
11 KiB
LLVM
261 lines
11 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39440.
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; RUN: llc %s -O2 -mtriple=i386-unknown-linux-gnu -o - -verify-machineinstrs=0 | FileCheck %s
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@.str = external dso_local unnamed_addr constant [6 x i8], align 1
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@a = external dso_local local_unnamed_addr global i32, align 4
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@h = external dso_local local_unnamed_addr global i32, align 4
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@g = external dso_local local_unnamed_addr global i8, align 1
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define dso_local void @fn() {
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; CHECK-LABEL: fn:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushl %ebp
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: pushl %ebx
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; CHECK-NEXT: .cfi_def_cfa_offset 12
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; CHECK-NEXT: pushl %edi
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: pushl %esi
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; CHECK-NEXT: .cfi_def_cfa_offset 20
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; CHECK-NEXT: subl $28, %esp
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; CHECK-NEXT: .cfi_def_cfa_offset 48
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; CHECK-NEXT: .cfi_offset %esi, -20
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; CHECK-NEXT: .cfi_offset %edi, -16
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; CHECK-NEXT: .cfi_offset %ebx, -12
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; CHECK-NEXT: .cfi_offset %ebp, -8
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; CHECK-NEXT: xorl %ebx, %ebx
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; CHECK-NEXT: # implicit-def: $ecx
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; CHECK-NEXT: # implicit-def: $edi
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; CHECK-NEXT: # implicit-def: $al
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; CHECK-NEXT: # kill: killed $al
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; CHECK-NEXT: # implicit-def: $dl
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; CHECK-NEXT: # implicit-def: $ebp
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; CHECK-NEXT: jmp .LBB0_1
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_15: # %for.inc
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl %esi, %ecx
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; CHECK-NEXT: movb %dl, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill
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; CHECK-NEXT: movb %dh, %dl
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; CHECK-NEXT: .LBB0_1: # %for.cond
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; CHECK-NEXT: # =>This Loop Header: Depth=1
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; CHECK-NEXT: # Child Loop BB0_19 Depth 2
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; CHECK-NEXT: cmpb $8, %dl
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; CHECK-NEXT: movb %dl, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill
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; CHECK-NEXT: ja .LBB0_3
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; CHECK-NEXT: # %bb.2: # %for.cond
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: je .LBB0_3
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; CHECK-NEXT: # %bb.4: # %if.end
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: cltd
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; CHECK-NEXT: idivl a
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; CHECK-NEXT: movb {{[-0-9]+}}(%e{{[sb]}}p), %dl # 1-byte Reload
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; CHECK-NEXT: movb %cl, %dh
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; CHECK-NEXT: movl $0, h
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; CHECK-NEXT: cmpb $8, %dl
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; CHECK-NEXT: jg .LBB0_9
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; CHECK-NEXT: # %bb.5: # %if.then13
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl %eax, %esi
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; CHECK-NEXT: movl $.str, (%esp)
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; CHECK-NEXT: movb %dh, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill
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; CHECK-NEXT: calll printf
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; CHECK-NEXT: movb {{[-0-9]+}}(%e{{[sb]}}p), %dh # 1-byte Reload
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: # implicit-def: $eax
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; CHECK-NEXT: movb {{[-0-9]+}}(%e{{[sb]}}p), %cl # 1-byte Reload
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; CHECK-NEXT: movb %dh, %dl
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; CHECK-NEXT: jne .LBB0_15
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; CHECK-NEXT: jmp .LBB0_6
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_3: # %if.then
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl $.str, (%esp)
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; CHECK-NEXT: calll printf
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; CHECK-NEXT: movb {{[-0-9]+}}(%e{{[sb]}}p), %dl # 1-byte Reload
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; CHECK-NEXT: # implicit-def: $eax
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; CHECK-NEXT: movb {{[-0-9]+}}(%e{{[sb]}}p), %cl # 1-byte Reload
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; CHECK-NEXT: jmp .LBB0_6
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_9: # %if.end21
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: # implicit-def: $ebp
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; CHECK-NEXT: jmp .LBB0_10
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_6: # %for.cond35
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movb %dl, %dh
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; CHECK-NEXT: testl %edi, %edi
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; CHECK-NEXT: movl %edi, %esi
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; CHECK-NEXT: movl $0, %edi
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; CHECK-NEXT: movb %cl, %dl
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; CHECK-NEXT: je .LBB0_19
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; CHECK-NEXT: # %bb.7: # %af
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: jne .LBB0_8
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; CHECK-NEXT: .LBB0_16: # %if.end39
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: testl %eax, %eax
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; CHECK-NEXT: je .LBB0_18
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; CHECK-NEXT: # %bb.17: # %if.then41
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl $0, {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl $fn, {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl $.str, (%esp)
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; CHECK-NEXT: calll printf
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; CHECK-NEXT: .LBB0_18: # %for.end46
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: # implicit-def: $dl
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; CHECK-NEXT: # implicit-def: $dh
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; CHECK-NEXT: # implicit-def: $ebp
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_19: # %for.cond47
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; CHECK-NEXT: # Parent Loop BB0_1 Depth=1
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; CHECK-NEXT: # => This Inner Loop Header: Depth=2
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: jne .LBB0_19
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; CHECK-NEXT: # %bb.20: # %for.cond47
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; CHECK-NEXT: # in Loop: Header=BB0_19 Depth=2
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: jne .LBB0_19
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; CHECK-NEXT: .LBB0_10: # %ae
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: jne .LBB0_11
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; CHECK-NEXT: # %bb.12: # %if.end26
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: xorl %esi, %esi
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; CHECK-NEXT: testb %dl, %dl
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; CHECK-NEXT: je .LBB0_15
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; CHECK-NEXT: # %bb.13: # %if.end26
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: testl %ebp, %ebp
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; CHECK-NEXT: jne .LBB0_15
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; CHECK-NEXT: # %bb.14: # %if.then31
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: xorl %esi, %esi
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; CHECK-NEXT: xorl %ebp, %ebp
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; CHECK-NEXT: jmp .LBB0_15
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_11: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: movl %edi, %esi
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; CHECK-NEXT: # implicit-def: $eax
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; CHECK-NEXT: testb %bl, %bl
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; CHECK-NEXT: je .LBB0_16
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; CHECK-NEXT: .LBB0_8: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: # implicit-def: $edi
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; CHECK-NEXT: # implicit-def: $cl
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; CHECK-NEXT: # implicit-def: $dl
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; CHECK-NEXT: # implicit-def: $ebp
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; CHECK-NEXT: jmp .LBB0_6
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%l.0 = phi i16 [ undef, %entry ], [ 0, %for.inc ]
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%m.0 = phi i32 [ undef, %entry ], [ %m.2, %for.inc ]
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%i.0 = phi i32 [ undef, %entry ], [ %i.2, %for.inc ]
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%p.0 = phi i8 [ undef, %entry ], [ %p.2, %for.inc ]
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%k.0 = phi i8 [ undef, %entry ], [ %k.2, %for.inc ]
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%q.0 = phi i32 [ undef, %entry ], [ %q.2, %for.inc ]
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%cmp = icmp ugt i8 %k.0, 8
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%or.cond61 = or i1 %cmp, undef
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br i1 %or.cond61, label %if.then, label %if.end
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if.then: ; preds = %for.cond
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tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i32 0, i32 0), i64 undef)
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br label %for.cond35
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if.end: ; preds = %for.cond
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%0 = load i32, i32* @a, align 4
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%div = sdiv i32 %m.0, %0
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br label %ac
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ac: ; preds = %ac, %if.end
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br i1 undef, label %if.end9, label %ac
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if.end9: ; preds = %ac
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%conv3 = trunc i32 %m.0 to i8
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%conv5 = sext i16 %l.0 to i32
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store i32 %conv5, i32* @h, align 4
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%cmp11 = icmp slt i8 %k.0, 9
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br i1 %cmp11, label %if.then13, label %if.end21
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if.then13: ; preds = %if.end9
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tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i32 0, i32 0), i64 undef)
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br i1 undef, label %for.inc, label %for.cond35
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if.end21: ; preds = %if.end9
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%1 = load i8, i8* @g, align 1
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br label %ae
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ae: ; preds = %for.cond47, %if.end21
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%l.2 = phi i16 [ undef, %if.end21 ], [ 0, %for.cond47 ]
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%i.1 = phi i32 [ %i.0, %if.end21 ], [ %i.5, %for.cond47 ]
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%p.1 = phi i8 [ %k.0, %if.end21 ], [ %p.6, %for.cond47 ]
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%k.1 = phi i8 [ %conv3, %if.end21 ], [ %k.6, %for.cond47 ]
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%q.1 = phi i32 [ undef, %if.end21 ], [ %q.5, %for.cond47 ]
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br i1 undef, label %if.end26, label %af
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if.end26: ; preds = %ae
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%tobool27 = icmp eq i32 %q.1, 0
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%tobool30 = icmp ne i8 %p.1, 0
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%or.cond = and i1 %tobool30, %tobool27
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br i1 %or.cond, label %if.then31, label %for.inc
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if.then31: ; preds = %if.end26
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br label %for.inc
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for.inc: ; preds = %if.then31, %if.end26, %if.then13
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%m.2 = phi i32 [ 0, %if.then31 ], [ 0, %if.end26 ], [ %div, %if.then13 ]
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%i.2 = phi i32 [ %i.1, %if.then31 ], [ %i.1, %if.end26 ], [ %i.0, %if.then13 ]
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%p.2 = phi i8 [ %p.1, %if.then31 ], [ %p.1, %if.end26 ], [ undef, %if.then13 ]
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%k.2 = phi i8 [ %k.1, %if.then31 ], [ %k.1, %if.end26 ], [ %conv3, %if.then13 ]
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%q.2 = phi i32 [ 0, %if.then31 ], [ %q.1, %if.end26 ], [ %q.0, %if.then13 ]
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%2 = load i32, i32* @h, align 4
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br label %for.cond
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for.cond35: ; preds = %for.inc44, %if.then13, %if.then
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%i.3 = phi i32 [ undef, %for.inc44 ], [ %i.0, %if.then ], [ %i.0, %if.then13 ]
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%o.2 = phi i32 [ %o.3, %for.inc44 ], [ undef, %if.then ], [ undef, %if.then13 ]
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%p.4 = phi i8 [ undef, %for.inc44 ], [ %p.0, %if.then ], [ %k.0, %if.then13 ]
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%k.4 = phi i8 [ undef, %for.inc44 ], [ %k.0, %if.then ], [ %conv3, %if.then13 ]
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%q.3 = phi i32 [ undef, %for.inc44 ], [ %q.0, %if.then ], [ %q.0, %if.then13 ]
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%tobool36 = icmp eq i32 %i.3, 0
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br i1 %tobool36, label %for.end46, label %af
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af: ; preds = %for.cond35, %ae
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%i.4 = phi i32 [ %i.3, %for.cond35 ], [ %i.1, %ae ]
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%o.3 = phi i32 [ %o.2, %for.cond35 ], [ undef, %ae ]
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br i1 undef, label %if.end39, label %for.inc44
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if.end39: ; preds = %af
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%tobool40 = icmp eq i32 %o.3, 0
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br i1 %tobool40, label %for.end46, label %if.then41
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if.then41: ; preds = %if.end39
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tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i32 0, i32 0), i64 ptrtoint (void ()* @fn to i64))
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br label %for.end46
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for.inc44: ; preds = %af
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br label %for.cond35
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for.end46: ; preds = %if.then41, %if.end39, %for.cond35
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%i.5 = phi i32 [ %i.4, %if.then41 ], [ %i.4, %if.end39 ], [ 0, %for.cond35 ]
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%p.6 = phi i8 [ undef, %if.then41 ], [ undef, %if.end39 ], [ %p.4, %for.cond35 ]
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%k.6 = phi i8 [ undef, %if.then41 ], [ undef, %if.end39 ], [ %k.4, %for.cond35 ]
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%q.5 = phi i32 [ undef, %if.then41 ], [ undef, %if.end39 ], [ %q.3, %for.cond35 ]
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br label %for.cond47
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for.cond47: ; preds = %for.cond47, %for.end46
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%brmerge = or i1 false, undef
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br i1 %brmerge, label %for.cond47, label %ae
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}
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declare dso_local void @printf(i8* nocapture readonly, ...) local_unnamed_addr
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