1 ; RUN: llc -mtriple=aarch64-linux-gnu -filetype=obj -o - %s | llvm-objdump -disassemble - | FileCheck %s 2 3 ; The encoding of lsb -> immr in the CGed bitfield instructions was wrong at one 4 ; point, in the edge case where lsb = 0. Just make sure. 5 6 define void @test_bfi0(i32* %existing, i32* %new) { 7 ; CHECK: bfxil {{w[0-9]+}}, {{w[0-9]+}}, #0, #18 8 9 %oldval = load volatile i32* %existing 10 %oldval_keep = and i32 %oldval, 4294705152 ; 0xfffc_0000 11 12 %newval = load volatile i32* %new 13 %newval_masked = and i32 %newval, 262143 ; = 0x0003_ffff 14 15 %combined = or i32 %newval_masked, %oldval_keep 16 store volatile i32 %combined, i32* %existing 17 18 ret void 19 } 20
