1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
; RUN: llc < %s -O3 -mtriple=arm-linux-gnueabi | FileCheck %s
; RUN: llc -mtriple=thumbv7-none-linux-gnueabi -verify-machineinstrs < %s | FileCheck %s
; check if regs are passing correctly
define void @i64_write(i64* %p, i64 %val) nounwind {
; CHECK-LABEL: i64_write:
; CHECK: ldrexd [[REG1:(r[0-9]?[02468])]], {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; CHECK: strexd [[REG1]], {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}
%1 = tail call i64 asm sideeffect "1: ldrexd $0, ${0:H}, [$2]\0A strexd $0, $3, ${3:H}, [$2]\0A teq $0, #0\0A bne 1b", "=&r,=*Qo,r,r,~{cc}"(i64* %p, i64* %p, i64 %val) nounwind
ret void
}
; check if register allocation can reuse the registers
define void @multi_writes(i64* %p, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind {
entry:
; CHECK-LABEL: multi_writes:
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
tail call void asm sideeffect " strexd $1, ${1:H}, [$0]\0A strexd $2, ${2:H}, [$0]\0A strexd $3, ${3:H}, [$0]\0A strexd $4, ${4:H}, [$0]\0A strexd $5, ${5:H}, [$0]\0A strexd $6, ${6:H}, [$0]\0A", "r,r,r,r,r,r,r"(i64* %p, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind
%incdec.ptr = getelementptr inbounds i64* %p, i32 1
tail call void asm sideeffect " strexd $1, ${1:H}, [$0]\0A strexd $2, ${2:H}, [$0]\0A strexd $3, ${3:H}, [$0]\0A strexd $4, ${4:H}, [$0]\0A strexd $5, ${5:H}, [$0]\0A strexd $6, ${6:H}, [$0]\0A", "r,r,r,r,r,r,r"(i64* %incdec.ptr, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind
tail call void asm sideeffect " strexd $1, ${1:H}, [$0]\0A strexd $2, ${2:H}, [$0]\0A strexd $3, ${3:H}, [$0]\0A strexd $4, ${4:H}, [$0]\0A strexd $5, ${5:H}, [$0]\0A strexd $6, ${6:H}, [$0]\0A", "r,r,r,r,r,r,r"(i64* %incdec.ptr, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind
ret void
}
; check if callee-saved registers used by inline asm are saved/restored
define void @foo(i64* %p, i64 %i) nounwind {
; CHECK-LABEL:foo:
; CHECK: {{push|push.w}} {{{r[4-9]|r10|r11}}
; CHECK: ldrexd [[REG1:(r[0-9]?[02468])]], {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
; CHECK: strexd [[REG1]], {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}
; CHECK: {{pop|pop.w}} {{{r[4-9]|r10|r11}}
%1 = tail call { i64, i64 } asm sideeffect "@ atomic64_set\0A1: ldrexd $0, ${0:H}, [$3]\0Aldrexd $1, ${1:H}, [$3]\0A strexd $0, $4, ${4:H}, [$3]\0A teq $0, #0\0A bne 1b", "=&r,=&r,=*Qo,r,r,~{cc}"(i64* %p, i64* %p, i64 %i) nounwind
ret void
}
; return *p;
define i64 @ldrd_test(i64* %p) nounwind {
; CHECK-LABEL: ldrd_test:
%1 = tail call i64 asm "ldrd $0, ${0:H}, [$1]", "=r,r"(i64* %p) nounwind
ret i64 %1
}
define i64 @QR_test(i64* %p) nounwind {
; CHECK-LABEL: QR_test:
; CHECK: ldrd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}
%1 = tail call i64 asm "ldrd ${0:Q}, ${0:R}, [$1]", "=r,r"(i64* %p) nounwind
ret i64 %1
}
define i64 @defuse_test(i64 %p) nounwind {
; CHECK-LABEL: defuse_test:
; CHECK: add {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, #1
%1 = tail call i64 asm "add $0, ${0:H}, #1", "=r,0"(i64 %p) nounwind
ret i64 %1
}
; *p = (hi << 32) | lo;
define void @strd_test(i64* %p, i32 %lo, i32 %hi) nounwind {
; CHECK-LABEL: strd_test:
; CHECK: strd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}
%1 = zext i32 %hi to i64
%2 = shl nuw i64 %1, 32
%3 = sext i32 %lo to i64
%4 = or i64 %2, %3
tail call void asm sideeffect "strd $0, ${0:H}, [$1]", "r,r"(i64 %4, i64* %p) nounwind
ret void
}
; Make sure we don't untie operands by mistake.
define i64 @tied_64bit_test(i64 %in) nounwind {
; CHECK-LABEL: tied_64bit_test:
; CHECK: OUT([[OUTREG:r[0-9]+]]), IN([[OUTREG]])
%addr = alloca i64
call void asm "OUT($0), IN($1)", "=*rm,0"(i64* %addr, i64 %in)
ret i64 %in
}
; If we explicitly name a tied operand, then the code should lookup the operand
; we were tied to for information about register class and so on.
define i64 @tied_64bit_lookback_test(i64 %in) nounwind {
; CHECK-LABEL: tied_64bit_lookback_test:
; CHECK: OUTLO([[LO:r[0-9]+]]) OUTHI([[HI:r[0-9]+]]) INLO([[LO]]) INHI([[HI]])
%vars = call {i64, i32, i64} asm "OUTLO(${2:Q}) OUTHI(${2:R}) INLO(${3:Q}) INHI(${3:R})", "=r,=r,=r,2"(i64 %in)
%res = extractvalue {i64, i32, i64} %vars, 2
ret i64 %res
}
|
