1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
2 ; RUN: llc -mtriple=x86_64-grtev4-linux-gnu < %s | FileCheck %s
4 ; Test a bad interaction between register allocation and the register
5 ; coalescer. The coalescer lost the high subregister def when
6 ; SUBREG_TO_REG was used to implement i32->i64 zext. The allocator
7 ; then recognized the undef subregister defing MOV as a copy
8 ; instruction, resulting in the users seeing different undef values.
11 %struct.wibble = type { %struct.wombat }
12 %struct.wombat = type { %struct.ham, [3 x i8] }
13 %struct.ham = type { %struct.zot }
14 %struct.zot = type { %struct.blam }
15 %struct.blam = type { %struct.ham.0 }
16 %struct.ham.0 = type { %struct.bar }
17 %struct.bar = type { %struct.bar.1 }
18 %struct.bar.1 = type { %struct.baz, i8 }
19 %struct.baz = type { %struct.snork }
20 %struct.snork = type <{ %struct.spam, i8, [3 x i8] }>
21 %struct.spam = type { %struct.snork.2, %struct.snork.2 }
22 %struct.snork.2 = type { i32 }
24 define void @foo(ptr %arg3, i1 %icmp16) #0 {
26 ; CHECK: # %bb.0: # %bb
27 ; CHECK-NEXT: pushq %rbp
28 ; CHECK-NEXT: .cfi_def_cfa_offset 16
29 ; CHECK-NEXT: .cfi_offset %rbp, -16
30 ; CHECK-NEXT: movq %rsp, %rbp
31 ; CHECK-NEXT: .cfi_def_cfa_register %rbp
32 ; CHECK-NEXT: pushq %r15
33 ; CHECK-NEXT: pushq %r14
34 ; CHECK-NEXT: pushq %r13
35 ; CHECK-NEXT: pushq %r12
36 ; CHECK-NEXT: pushq %rbx
37 ; CHECK-NEXT: pushq %rax
38 ; CHECK-NEXT: .cfi_offset %rbx, -56
39 ; CHECK-NEXT: .cfi_offset %r12, -48
40 ; CHECK-NEXT: .cfi_offset %r13, -40
41 ; CHECK-NEXT: .cfi_offset %r14, -32
42 ; CHECK-NEXT: .cfi_offset %r15, -24
43 ; CHECK-NEXT: movl %esi, %ebx
44 ; CHECK-NEXT: movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
45 ; CHECK-NEXT: xorl %r15d, %r15d
46 ; CHECK-NEXT: xorl %r12d, %r12d
47 ; CHECK-NEXT: # implicit-def: $r13
48 ; CHECK-NEXT: jmp .LBB0_2
49 ; CHECK-NEXT: .p2align 4, 0x90
50 ; CHECK-NEXT: .LBB0_1: # %bb5
51 ; CHECK-NEXT: # in Loop: Header=BB0_2 Depth=1
52 ; CHECK-NEXT: orl $1, %r12d
53 ; CHECK-NEXT: movq %r14, %r15
54 ; CHECK-NEXT: .LBB0_2: # %bb7
55 ; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
56 ; CHECK-NEXT: xorl %eax, %eax
57 ; CHECK-NEXT: callq *%rax
58 ; CHECK-NEXT: movl %r13d, %r13d
59 ; CHECK-NEXT: testb $1, %bl
60 ; CHECK-NEXT: movl $0, %r14d
61 ; CHECK-NEXT: jne .LBB0_1
62 ; CHECK-NEXT: # %bb.3: # %bb17
63 ; CHECK-NEXT: # in Loop: Header=BB0_2 Depth=1
64 ; CHECK-NEXT: xorl %r14d, %r14d
65 ; CHECK-NEXT: testq %r15, %r15
66 ; CHECK-NEXT: sete %r14b
67 ; CHECK-NEXT: xorl %edi, %edi
68 ; CHECK-NEXT: xorl %eax, %eax
69 ; CHECK-NEXT: callq *%rax
70 ; CHECK-NEXT: shll $4, %r14d
71 ; CHECK-NEXT: addq {{[-0-9]+}}(%r{{[sb]}}p), %r14 # 8-byte Folded Reload
72 ; CHECK-NEXT: movl %r13d, 0
73 ; CHECK-NEXT: movb $0, 4
74 ; CHECK-NEXT: jmp .LBB0_1
78 bb5: ; preds = %bb17, %bb7
79 %phi6 = phi ptr [ %getelementptr, %bb17 ], [ null, %bb7 ]
80 %add = or i32 %phi9, 1
81 %icmp = icmp eq i32 %phi9, 0
84 bb7: ; preds = %bb5, %bb
85 %phi8 = phi ptr [ null, %bb ], [ %phi6, %bb5 ]
86 %phi9 = phi i32 [ 0, %bb ], [ %add, %bb5 ]
87 %phi10 = phi i40 [ undef, %bb ], [ %and, %bb5 ]
88 %call = call ptr null()
89 %and = and i40 %phi10, 4294967295
90 %icmp161 = icmp ugt ptr %phi8, null
91 br i1 %icmp16, label %bb5, label %bb17
94 %icmp18 = icmp eq ptr %phi8, null
95 %zext = zext i1 %icmp18 to i64
96 %call19 = call ptr null(i64 0)
97 %getelementptr = getelementptr %struct.wibble, ptr %arg3, i64 %zext
98 store i40 %and, ptr null, align 4
102 attributes #0 = { "frame-pointer"="all" }