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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown -mcpu=generic | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=generic | FileCheck %s --check-prefix=X64
; Verify that we correctly lower ISD::READCYCLECOUNTER.
define i64 @test_builtin_readcyclecounter() {
; X86-LABEL: test_builtin_readcyclecounter:
; X86: # %bb.0:
; X86-NEXT: rdtsc
; X86-NEXT: retl
;
; X64-LABEL: test_builtin_readcyclecounter:
; X64: # %bb.0:
; X64-NEXT: rdtsc
; X64-NEXT: shlq $32, %rdx
; X64-NEXT: orq %rdx, %rax
; X64-NEXT: retq
%1 = tail call i64 @llvm.readcyclecounter()
ret i64 %1
}
; Verify that we correctly lower the Read Cycle Counter GCC x86 builtins
; (i.e. RDTSC and RDTSCP).
define i64 @test_builtin_rdtsc() {
; X86-LABEL: test_builtin_rdtsc:
; X86: # %bb.0:
; X86-NEXT: rdtsc
; X86-NEXT: retl
;
; X64-LABEL: test_builtin_rdtsc:
; X64: # %bb.0:
; X64-NEXT: rdtsc
; X64-NEXT: shlq $32, %rdx
; X64-NEXT: orq %rdx, %rax
; X64-NEXT: retq
%1 = tail call i64 @llvm.x86.rdtsc()
ret i64 %1
}
define i64 @test_builtin_rdtscp(i8* %A) {
; X86-LABEL: test_builtin_rdtscp:
; X86: # %bb.0:
; X86-NEXT: pushl %esi
; X86-NEXT: .cfi_def_cfa_offset 8
; X86-NEXT: .cfi_offset %esi, -8
; X86-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NEXT: rdtscp
; X86-NEXT: movl %ecx, (%esi)
; X86-NEXT: popl %esi
; X86-NEXT: .cfi_def_cfa_offset 4
; X86-NEXT: retl
;
; X64-LABEL: test_builtin_rdtscp:
; X64: # %bb.0:
; X64-NEXT: rdtscp
; X64-NEXT: shlq $32, %rdx
; X64-NEXT: orq %rdx, %rax
; X64-NEXT: movl %ecx, (%rdi)
; X64-NEXT: retq
%1 = call { i64, i32 } @llvm.x86.rdtscp()
%2 = extractvalue { i64, i32 } %1, 1
%3 = bitcast i8* %A to i32*
store i32 %2, i32* %3, align 1
%4 = extractvalue { i64, i32 } %1, 0
ret i64 %4
}
declare i64 @llvm.readcyclecounter()
declare { i64, i32 } @llvm.x86.rdtscp()
declare i64 @llvm.x86.rdtsc()
|
