mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-23 15:29:51 +00:00
f5f8a3e6a6
It can help with argument juggling on some targets, and is generally a good idea. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226740 91177308-0d34-0410-b5e6-96231b3b80d8
45 lines
1.1 KiB
LLVM
45 lines
1.1 KiB
LLVM
; RUN: llc -mtriple=aarch64-linux-gnu -o - %s | FileCheck %s
|
|
|
|
define i32 @test_consts(i32 %in) {
|
|
; CHECK-LABEL: test_consts:
|
|
; CHECK-NOT: bfxil
|
|
; CHECK-NOT: and
|
|
; CHECK-NOT: orr
|
|
; CHECK: ret
|
|
|
|
%lo = and i32 %in, 65535
|
|
%hi = and i32 %in, -65536
|
|
%res = or i32 %lo, %hi
|
|
ret i32 %res
|
|
}
|
|
|
|
define i32 @test_generic(i32 %in, i32 %mask1, i32 %mask2) {
|
|
; CHECK-LABEL: test_generic:
|
|
; CHECK: orr [[FULL_MASK:w[0-9]+]], w1, w2
|
|
; CHECK: and w0, w0, [[FULL_MASK]]
|
|
|
|
%lo = and i32 %in, %mask1
|
|
%hi = and i32 %in, %mask2
|
|
%res = or i32 %lo, %hi
|
|
ret i32 %res
|
|
}
|
|
|
|
; In this case the transformation isn't profitable, since %lo and %hi
|
|
; are used more than once.
|
|
define [3 x i32] @test_reuse(i32 %in, i32 %mask1, i32 %mask2) {
|
|
; CHECK-LABEL: test_reuse:
|
|
; CHECK-DAG: and w1, w0, w1
|
|
; CHECK-DAG: and w2, w0, w2
|
|
; CHECK-DAG: orr w0, w1, w2
|
|
|
|
%lo = and i32 %in, %mask1
|
|
%hi = and i32 %in, %mask2
|
|
%recombine = or i32 %lo, %hi
|
|
|
|
%res.tmp0 = insertvalue [3 x i32] undef, i32 %recombine, 0
|
|
%res.tmp1 = insertvalue [3 x i32] %res.tmp0, i32 %lo, 1
|
|
%res = insertvalue [3 x i32] %res.tmp1, i32 %hi, 2
|
|
|
|
ret [3 x i32] %res
|
|
}
|