1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=i686-unknown-unknown -mcpu=i686 | FileCheck %s --check-prefix=X86 3 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64 4 5 ; Combine BSWAP (lowered to rolw 8) with a second rotate. 6 ; This test checks for combining rotates with inconsistent constant value types. 7 8 define i16 @combine_bswap_rotate(i16 %a0) { 9 ; X86-LABEL: combine_bswap_rotate: 10 ; X86: # %bb.0: 11 ; X86-NEXT: movzwl {{[0-9]+}}(%esp), %eax 12 ; X86-NEXT: rolw $9, %ax 13 ; X86-NEXT: retl 14 ; 15 ; X64-LABEL: combine_bswap_rotate: 16 ; X64: # %bb.0: 17 ; X64-NEXT: rolw $9, %di 18 ; X64-NEXT: movl %edi, %eax 19 ; X64-NEXT: retq 20 %1 = call i16 @llvm.bswap.i16(i16 %a0) 21 %2 = shl i16 %1, 1 22 %3 = lshr i16 %1, 15 23 %4 = or i16 %2, %3 24 ret i16 %4 25 } 26 27 declare i16 @llvm.bswap.i16(i16) 28
