1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=instcombine -S | FileCheck %s
4 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
6 ; A copy of bswap.ll, with undef at insertelement/shufflevector replaced with
9 define i32 @shuf_4bytes(<4 x i8> %x) {
10 ; CHECK-LABEL: @shuf_4bytes(
11 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast <4 x i8> [[X:%.*]] to i32
12 ; CHECK-NEXT: [[CAST:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP1]])
13 ; CHECK-NEXT: ret i32 [[CAST]]
15 %bswap = shufflevector <4 x i8> %x, <4 x i8> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
16 %cast = bitcast <4 x i8> %bswap to i32
20 define i32 @shuf_load_4bytes(ptr %p) {
21 ; CHECK-LABEL: @shuf_load_4bytes(
22 ; CHECK-NEXT: [[X1:%.*]] = load i32, ptr [[P:%.*]], align 4
23 ; CHECK-NEXT: [[CAST:%.*]] = call i32 @llvm.bswap.i32(i32 [[X1]])
24 ; CHECK-NEXT: ret i32 [[CAST]]
26 %x = load <4 x i8>, ptr %p
27 %bswap = shufflevector <4 x i8> %x, <4 x i8> poison, <4 x i32> <i32 3, i32 2, i32 undef, i32 0>
28 %cast = bitcast <4 x i8> %bswap to i32
32 define i32 @shuf_bitcast_twice_4bytes(i32 %x) {
33 ; CHECK-LABEL: @shuf_bitcast_twice_4bytes(
34 ; CHECK-NEXT: [[CAST2:%.*]] = call i32 @llvm.bswap.i32(i32 [[X:%.*]])
35 ; CHECK-NEXT: ret i32 [[CAST2]]
37 %cast1 = bitcast i32 %x to <4 x i8>
38 %bswap = shufflevector <4 x i8> %cast1, <4 x i8> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
39 %cast2 = bitcast <4 x i8> %bswap to i32
43 ; Negative test - extra use
44 declare void @use(<4 x i8>)
46 define i32 @shuf_4bytes_extra_use(<4 x i8> %x) {
47 ; CHECK-LABEL: @shuf_4bytes_extra_use(
48 ; CHECK-NEXT: [[BSWAP:%.*]] = shufflevector <4 x i8> [[X:%.*]], <4 x i8> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
49 ; CHECK-NEXT: call void @use(<4 x i8> [[BSWAP]])
50 ; CHECK-NEXT: [[CAST:%.*]] = bitcast <4 x i8> [[BSWAP]] to i32
51 ; CHECK-NEXT: ret i32 [[CAST]]
53 %bswap = shufflevector <4 x i8> %x, <4 x i8> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
54 call void @use(<4 x i8> %bswap)
55 %cast = bitcast <4 x i8> %bswap to i32
59 ; Negative test - scalar type is not in the data layout
61 define i128 @shuf_16bytes(<16 x i8> %x) {
62 ; CHECK-LABEL: @shuf_16bytes(
63 ; CHECK-NEXT: [[BSWAP:%.*]] = shufflevector <16 x i8> [[X:%.*]], <16 x i8> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
64 ; CHECK-NEXT: [[CAST:%.*]] = bitcast <16 x i8> [[BSWAP]] to i128
65 ; CHECK-NEXT: ret i128 [[CAST]]
67 %bswap = shufflevector <16 x i8> %x, <16 x i8> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
68 %cast = bitcast <16 x i8> %bswap to i128
72 ; Negative test - don't touch widening shuffles (for now)
74 define i32 @shuf_2bytes_widening(<2 x i8> %x) {
75 ; CHECK-LABEL: @shuf_2bytes_widening(
76 ; CHECK-NEXT: [[BSWAP:%.*]] = shufflevector <2 x i8> [[X:%.*]], <2 x i8> poison, <4 x i32> <i32 1, i32 0, i32 poison, i32 poison>
77 ; CHECK-NEXT: [[CAST:%.*]] = bitcast <4 x i8> [[BSWAP]] to i32
78 ; CHECK-NEXT: ret i32 [[CAST]]
80 %bswap = shufflevector <2 x i8> %x, <2 x i8> poison, <4 x i32> <i32 1, i32 0, i32 undef, i32 undef>
81 %cast = bitcast <4 x i8> %bswap to i32
85 declare i32 @llvm.fshl.i32(i32, i32, i32)
86 declare i32 @llvm.fshr.i32(i32, i32, i32)