102 lines
3.6 KiB
LLVM
102 lines
3.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
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; RUN: llc -mtriple=x86_64-grtev4-linux-gnu < %s | FileCheck %s
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; Test a bad interaction between register allocation and the register
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; coalescer. The coalescer lost the high subregister def when
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; SUBREG_TO_REG was used to implement i32->i64 zext. The allocator
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; then recognized the undef subregister defing MOV as a copy
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; instruction, resulting in the users seeing different undef values.
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%struct.wibble = type { %struct.wombat }
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%struct.wombat = type { %struct.ham, [3 x i8] }
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%struct.ham = type { %struct.zot }
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%struct.zot = type { %struct.blam }
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%struct.blam = type { %struct.ham.0 }
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%struct.ham.0 = type { %struct.bar }
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%struct.bar = type { %struct.bar.1 }
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%struct.bar.1 = type { %struct.baz, i8 }
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%struct.baz = type { %struct.snork }
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%struct.snork = type <{ %struct.spam, i8, [3 x i8] }>
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%struct.spam = type { %struct.snork.2, %struct.snork.2 }
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%struct.snork.2 = type { i32 }
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define void @foo(ptr %arg3, i1 %icmp16) #0 {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0: # %bb
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; CHECK-NEXT: pushq %rbp
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset %rbp, -16
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; CHECK-NEXT: movq %rsp, %rbp
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; CHECK-NEXT: .cfi_def_cfa_register %rbp
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; CHECK-NEXT: pushq %r15
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; CHECK-NEXT: pushq %r14
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; CHECK-NEXT: pushq %r13
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; CHECK-NEXT: pushq %r12
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_offset %rbx, -56
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; CHECK-NEXT: .cfi_offset %r12, -48
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; CHECK-NEXT: .cfi_offset %r13, -40
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; CHECK-NEXT: .cfi_offset %r14, -32
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; CHECK-NEXT: .cfi_offset %r15, -24
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
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; CHECK-NEXT: xorl %r15d, %r15d
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; CHECK-NEXT: xorl %r12d, %r12d
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; CHECK-NEXT: # implicit-def: $r13
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; CHECK-NEXT: jmp .LBB0_2
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_1: # %bb5
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; CHECK-NEXT: # in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: orl $1, %r12d
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; CHECK-NEXT: movq %r14, %r15
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; CHECK-NEXT: .LBB0_2: # %bb7
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: callq *%rax
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; CHECK-NEXT: movl %r13d, %r13d
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; CHECK-NEXT: testb $1, %bl
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; CHECK-NEXT: movl $0, %r14d
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; CHECK-NEXT: jne .LBB0_1
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; CHECK-NEXT: # %bb.3: # %bb17
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; CHECK-NEXT: # in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: xorl %r14d, %r14d
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; CHECK-NEXT: testq %r15, %r15
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; CHECK-NEXT: sete %r14b
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; CHECK-NEXT: xorl %edi, %edi
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: callq *%rax
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; CHECK-NEXT: shll $4, %r14d
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; CHECK-NEXT: addq {{[-0-9]+}}(%r{{[sb]}}p), %r14 # 8-byte Folded Reload
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; CHECK-NEXT: movl %r13d, 0
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; CHECK-NEXT: movb $0, 4
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; CHECK-NEXT: jmp .LBB0_1
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bb:
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br label %bb7
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bb5: ; preds = %bb17, %bb7
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%phi6 = phi ptr [ %getelementptr, %bb17 ], [ null, %bb7 ]
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%add = or i32 %phi9, 1
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%icmp = icmp eq i32 %phi9, 0
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br label %bb7
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bb7: ; preds = %bb5, %bb
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%phi8 = phi ptr [ null, %bb ], [ %phi6, %bb5 ]
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%phi9 = phi i32 [ 0, %bb ], [ %add, %bb5 ]
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%phi10 = phi i40 [ undef, %bb ], [ %and, %bb5 ]
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%call = call ptr null()
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%and = and i40 %phi10, 4294967295
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%icmp161 = icmp ugt ptr %phi8, null
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br i1 %icmp16, label %bb5, label %bb17
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bb17: ; preds = %bb7
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%icmp18 = icmp eq ptr %phi8, null
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%zext = zext i1 %icmp18 to i64
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%call19 = call ptr null(i64 0)
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%getelementptr = getelementptr %struct.wibble, ptr %arg3, i64 %zext
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store i40 %and, ptr null, align 4
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br label %bb5
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}
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attributes #0 = { "frame-pointer"="all" }
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