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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s3; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=CHECK644 5; Check reconstructing bswap from shifted masks and tree of ORs6 7; Match a 32-bit packed halfword bswap. That is8; ((x & 0x000000ff) << 8) |9; ((x & 0x0000ff00) >> 8) |10; ((x & 0x00ff0000) << 8) |11; ((x & 0xff000000) >> 8)12; => (rotl (bswap x), 16)13define i32 @test1(i32 %x) nounwind {14; CHECK-LABEL: test1:15; CHECK: # %bb.0:16; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax17; CHECK-NEXT: bswapl %eax18; CHECK-NEXT: roll $16, %eax19; CHECK-NEXT: retl20;21; CHECK64-LABEL: test1:22; CHECK64: # %bb.0:23; CHECK64-NEXT: movl %edi, %eax24; CHECK64-NEXT: bswapl %eax25; CHECK64-NEXT: roll $16, %eax26; CHECK64-NEXT: retq27 %byte0 = and i32 %x, 255 ; 0x000000ff28 %byte1 = and i32 %x, 65280 ; 0x0000ff0029 %byte2 = and i32 %x, 16711680 ; 0x00ff000030 %byte3 = and i32 %x, 4278190080 ; 0xff00000031 %tmp0 = shl i32 %byte0, 832 %tmp1 = lshr i32 %byte1, 833 %tmp2 = shl i32 %byte2, 834 %tmp3 = lshr i32 %byte3, 835 %or0 = or i32 %tmp0, %tmp136 %or1 = or i32 %tmp2, %tmp337 %result = or i32 %or0, %or138 ret i32 %result39}40 41; the same as test1, just shifts before the "and"42; ((x << 8) & 0x0000ff00) |43; ((x >> 8) & 0x000000ff) |44; ((x << 8) & 0xff000000) |45; ((x >> 8) & 0x00ff0000)46define i32 @test2(i32 %x) nounwind {47; CHECK-LABEL: test2:48; CHECK: # %bb.0:49; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax50; CHECK-NEXT: bswapl %eax51; CHECK-NEXT: roll $16, %eax52; CHECK-NEXT: retl53;54; CHECK64-LABEL: test2:55; CHECK64: # %bb.0:56; CHECK64-NEXT: movl %edi, %eax57; CHECK64-NEXT: bswapl %eax58; CHECK64-NEXT: roll $16, %eax59; CHECK64-NEXT: retq60 %byte1 = shl i32 %x, 861 %byte0 = lshr i32 %x, 862 %byte3 = shl i32 %x, 863 %byte2 = lshr i32 %x, 864 %tmp1 = and i32 %byte1, 65280 ; 0x0000ff0065 %tmp0 = and i32 %byte0, 255 ; 0x000000ff66 %tmp3 = and i32 %byte3, 4278190080 ; 0xff00000067 %tmp2 = and i32 %byte2, 16711680 ; 0x00ff000068 %or0 = or i32 %tmp0, %tmp169 %or1 = or i32 %tmp2, %tmp370 %result = or i32 %or0, %or171 ret i32 %result72}73 74declare i32 @llvm.bswap.i32(i32)75 76; Match a 32-bit packed halfword bswap, with some subtree77; already converted to a bswap.78define i32 @test3(i32 %x) nounwind {79; CHECK-LABEL: test3:80; CHECK: # %bb.0:81; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax82; CHECK-NEXT: bswapl %eax83; CHECK-NEXT: roll $16, %eax84; CHECK-NEXT: retl85;86; CHECK64-LABEL: test3:87; CHECK64: # %bb.0:88; CHECK64-NEXT: movl %edi, %eax89; CHECK64-NEXT: bswapl %eax90; CHECK64-NEXT: roll $16, %eax91; CHECK64-NEXT: retq92 %byte2 = and i32 %x, 16711680 ; 0x00ff000093 %byte3 = and i32 %x, 4278190080 ; 0xff00000094 %1 = shl i32 %byte2, 895 %2 = lshr i32 %byte3, 896 %or = or i32 %1, %297 %bswap = call i32 @llvm.bswap.i32(i32 %x)98 %3 = lshr i32 %bswap, 1699 %result = or i32 %or, %3100 ret i32 %result101}102