forked from OSchip/llvm-project
20 lines
657 B
LLVM
20 lines
657 B
LLVM
; RUN: llc -mtriple=aarch64-none-linux-gnu -filetype=obj < %s | llvm-objdump -disassemble - | FileCheck %s
|
|
|
|
; The encoding of lsb -> immr in the CGed bitfield instructions was wrong at one
|
|
; point, in the edge case where lsb = 0. Just make sure.
|
|
|
|
define void @test_bfi0(i32* %existing, i32* %new) {
|
|
; CHECK: bfxil {{w[0-9]+}}, {{w[0-9]+}}, #0, #18
|
|
|
|
%oldval = load volatile i32* %existing
|
|
%oldval_keep = and i32 %oldval, 4294705152 ; 0xfffc_0000
|
|
|
|
%newval = load volatile i32* %new
|
|
%newval_masked = and i32 %newval, 262143 ; = 0x0003_ffff
|
|
|
|
%combined = or i32 %newval_masked, %oldval_keep
|
|
store volatile i32 %combined, i32* %existing
|
|
|
|
ret void
|
|
}
|