1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: opt < %s -loop-reduce -mcpu=btver2 -S | FileCheck %s --check-prefix=JAG
3 ; RUN: opt < %s -loop-reduce -mcpu=bdver2 -S | FileCheck %s --check-prefix=BUL
4 ; RUN: opt < %s -loop-reduce -mcpu=haswell -S | FileCheck %s --check-prefix=HSW
6 ; RUN: llc < %s | FileCheck %s --check-prefix=BASE
7 ; RUN: llc < %s -mattr=macrofusion | FileCheck %s --check-prefix=FUSE
8 ; RUN: llc < %s -mattr=branchfusion | FileCheck %s --check-prefix=FUSE
10 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
11 target triple = "x86_64-unknown-unknown"
13 ; PR35681 - https://bugs.llvm.org/show_bug.cgi?id=35681
14 ; FIXME: If a CPU can macro-fuse a compare and branch, then we discount that
15 ; cost in LSR and avoid generating large offsets in each memory access.
16 ; This reduces code size and may improve decode throughput.
18 define void @maxArray(double* noalias nocapture %x, double* noalias nocapture readonly %y) {
19 ; JAG-LABEL: @maxArray(
21 ; JAG-NEXT: [[Y1:%.*]] = bitcast double* [[Y:%.*]] to i8*
22 ; JAG-NEXT: [[X3:%.*]] = bitcast double* [[X:%.*]] to i8*
23 ; JAG-NEXT: br label [[VECTOR_BODY:%.*]]
25 ; JAG-NEXT: [[LSR_IV:%.*]] = phi i64 [ [[LSR_IV_NEXT:%.*]], [[VECTOR_BODY]] ], [ -524288, [[ENTRY:%.*]] ]
26 ; JAG-NEXT: [[UGLYGEP7:%.*]] = getelementptr i8, i8* [[X3]], i64 [[LSR_IV]]
27 ; JAG-NEXT: [[UGLYGEP78:%.*]] = bitcast i8* [[UGLYGEP7]] to <2 x double>*
28 ; JAG-NEXT: [[SCEVGEP9:%.*]] = getelementptr <2 x double>, <2 x double>* [[UGLYGEP78]], i64 32768
29 ; JAG-NEXT: [[UGLYGEP:%.*]] = getelementptr i8, i8* [[Y1]], i64 [[LSR_IV]]
30 ; JAG-NEXT: [[UGLYGEP2:%.*]] = bitcast i8* [[UGLYGEP]] to <2 x double>*
31 ; JAG-NEXT: [[SCEVGEP:%.*]] = getelementptr <2 x double>, <2 x double>* [[UGLYGEP2]], i64 32768
32 ; JAG-NEXT: [[XVAL:%.*]] = load <2 x double>, <2 x double>* [[SCEVGEP9]], align 8
33 ; JAG-NEXT: [[YVAL:%.*]] = load <2 x double>, <2 x double>* [[SCEVGEP]], align 8
34 ; JAG-NEXT: [[CMP:%.*]] = fcmp ogt <2 x double> [[YVAL]], [[XVAL]]
35 ; JAG-NEXT: [[MAX:%.*]] = select <2 x i1> [[CMP]], <2 x double> [[YVAL]], <2 x double> [[XVAL]]
36 ; JAG-NEXT: [[UGLYGEP4:%.*]] = getelementptr i8, i8* [[X3]], i64 [[LSR_IV]]
37 ; JAG-NEXT: [[UGLYGEP45:%.*]] = bitcast i8* [[UGLYGEP4]] to <2 x double>*
38 ; JAG-NEXT: [[SCEVGEP6:%.*]] = getelementptr <2 x double>, <2 x double>* [[UGLYGEP45]], i64 32768
39 ; JAG-NEXT: store <2 x double> [[MAX]], <2 x double>* [[SCEVGEP6]], align 8
40 ; JAG-NEXT: [[LSR_IV_NEXT]] = add nsw i64 [[LSR_IV]], 16
41 ; JAG-NEXT: [[DONE:%.*]] = icmp eq i64 [[LSR_IV_NEXT]], 0
42 ; JAG-NEXT: br i1 [[DONE]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
46 ; BUL-LABEL: @maxArray(
48 ; BUL-NEXT: br label [[VECTOR_BODY:%.*]]
50 ; BUL-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
51 ; BUL-NEXT: [[SCEVGEP4:%.*]] = getelementptr double, double* [[X:%.*]], i64 [[INDEX]]
52 ; BUL-NEXT: [[SCEVGEP45:%.*]] = bitcast double* [[SCEVGEP4]] to <2 x double>*
53 ; BUL-NEXT: [[SCEVGEP:%.*]] = getelementptr double, double* [[Y:%.*]], i64 [[INDEX]]
54 ; BUL-NEXT: [[SCEVGEP1:%.*]] = bitcast double* [[SCEVGEP]] to <2 x double>*
55 ; BUL-NEXT: [[XVAL:%.*]] = load <2 x double>, <2 x double>* [[SCEVGEP45]], align 8
56 ; BUL-NEXT: [[YVAL:%.*]] = load <2 x double>, <2 x double>* [[SCEVGEP1]], align 8
57 ; BUL-NEXT: [[CMP:%.*]] = fcmp ogt <2 x double> [[YVAL]], [[XVAL]]
58 ; BUL-NEXT: [[MAX:%.*]] = select <2 x i1> [[CMP]], <2 x double> [[YVAL]], <2 x double> [[XVAL]]
59 ; BUL-NEXT: [[SCEVGEP2:%.*]] = getelementptr double, double* [[X]], i64 [[INDEX]]
60 ; BUL-NEXT: [[SCEVGEP23:%.*]] = bitcast double* [[SCEVGEP2]] to <2 x double>*
61 ; BUL-NEXT: store <2 x double> [[MAX]], <2 x double>* [[SCEVGEP23]], align 8
62 ; BUL-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 2
63 ; BUL-NEXT: [[DONE:%.*]] = icmp eq i64 [[INDEX_NEXT]], 65536
64 ; BUL-NEXT: br i1 [[DONE]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
68 ; HSW-LABEL: @maxArray(
70 ; HSW-NEXT: br label [[VECTOR_BODY:%.*]]
72 ; HSW-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
73 ; HSW-NEXT: [[SCEVGEP4:%.*]] = getelementptr double, double* [[X:%.*]], i64 [[INDEX]]
74 ; HSW-NEXT: [[SCEVGEP45:%.*]] = bitcast double* [[SCEVGEP4]] to <2 x double>*
75 ; HSW-NEXT: [[SCEVGEP:%.*]] = getelementptr double, double* [[Y:%.*]], i64 [[INDEX]]
76 ; HSW-NEXT: [[SCEVGEP1:%.*]] = bitcast double* [[SCEVGEP]] to <2 x double>*
77 ; HSW-NEXT: [[XVAL:%.*]] = load <2 x double>, <2 x double>* [[SCEVGEP45]], align 8
78 ; HSW-NEXT: [[YVAL:%.*]] = load <2 x double>, <2 x double>* [[SCEVGEP1]], align 8
79 ; HSW-NEXT: [[CMP:%.*]] = fcmp ogt <2 x double> [[YVAL]], [[XVAL]]
80 ; HSW-NEXT: [[MAX:%.*]] = select <2 x i1> [[CMP]], <2 x double> [[YVAL]], <2 x double> [[XVAL]]
81 ; HSW-NEXT: [[SCEVGEP2:%.*]] = getelementptr double, double* [[X]], i64 [[INDEX]]
82 ; HSW-NEXT: [[SCEVGEP23:%.*]] = bitcast double* [[SCEVGEP2]] to <2 x double>*
83 ; HSW-NEXT: store <2 x double> [[MAX]], <2 x double>* [[SCEVGEP23]], align 8
84 ; HSW-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 2
85 ; HSW-NEXT: [[DONE:%.*]] = icmp eq i64 [[INDEX_NEXT]], 65536
86 ; HSW-NEXT: br i1 [[DONE]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
90 ; BASE-LABEL: maxArray:
91 ; BASE: # %bb.0: # %entry
92 ; BASE-NEXT: movq $-524288, %rax # imm = 0xFFF80000
93 ; BASE-NEXT: .p2align 4, 0x90
94 ; BASE-NEXT: .LBB0_1: # %vector.body
95 ; BASE-NEXT: # =>This Inner Loop Header: Depth=1
96 ; BASE-NEXT: movupd 524288(%rdi,%rax), %xmm0
97 ; BASE-NEXT: movupd 524288(%rsi,%rax), %xmm1
98 ; BASE-NEXT: maxpd %xmm0, %xmm1
99 ; BASE-NEXT: movupd %xmm1, 524288(%rdi,%rax)
100 ; BASE-NEXT: addq $16, %rax
101 ; BASE-NEXT: jne .LBB0_1
102 ; BASE-NEXT: # %bb.2: # %exit
104 ; FUSE-LABEL: maxArray:
105 ; FUSE: # %bb.0: # %entry
106 ; FUSE-NEXT: xorl %eax, %eax
107 ; FUSE-NEXT: .p2align 4, 0x90
108 ; FUSE-NEXT: .LBB0_1: # %vector.body
109 ; FUSE-NEXT: # =>This Inner Loop Header: Depth=1
110 ; FUSE-NEXT: movupd (%rdi,%rax,8), %xmm0
111 ; FUSE-NEXT: movupd (%rsi,%rax,8), %xmm1
112 ; FUSE-NEXT: maxpd %xmm0, %xmm1
113 ; FUSE-NEXT: movupd %xmm1, (%rdi,%rax,8)
114 ; FUSE-NEXT: addq $2, %rax
115 ; FUSE-NEXT: cmpq $65536, %rax # imm = 0x10000
116 ; FUSE-NEXT: jne .LBB0_1
117 ; FUSE-NEXT: # %bb.2: # %exit
120 br label %vector.body
123 %index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
124 %gepx = getelementptr inbounds double, double* %x, i64 %index
125 %gepy = getelementptr inbounds double, double* %y, i64 %index
126 %xptr = bitcast double* %gepx to <2 x double>*
127 %yptr = bitcast double* %gepy to <2 x double>*
128 %xval = load <2 x double>, <2 x double>* %xptr, align 8
129 %yval = load <2 x double>, <2 x double>* %yptr, align 8
130 %cmp = fcmp ogt <2 x double> %yval, %xval
131 %max = select <2 x i1> %cmp, <2 x double> %yval, <2 x double> %xval
132 %xptr_again = bitcast double* %gepx to <2 x double>*
133 store <2 x double> %max, <2 x double>* %xptr_again, align 8
134 %index.next = add i64 %index, 2
135 %done = icmp eq i64 %index.next, 65536
136 br i1 %done, label %exit, label %vector.body