mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-28 23:43:50 +00:00
7f35455708
in-register, such that we can use a single vector store rather then a series of scalar stores. For func_4_8 the generated code vldr d16, LCPI0_0 vmov d17, r0, r1 vadd.i16 d16, d17, d16 vmov.u16 r0, d16[3] strb r0, [r2, #3] vmov.u16 r0, d16[2] strb r0, [r2, #2] vmov.u16 r0, d16[1] strb r0, [r2, #1] vmov.u16 r0, d16[0] strb r0, [r2] bx lr becomes vldr d16, LCPI0_0 vmov d17, r0, r1 vadd.i16 d16, d17, d16 vuzp.8 d16, d17 vst1.32 {d16[0]}, [r2, :32] bx lr I'm not fond of how this combine pessimizes 2012-03-13-DAGCombineBug.ll, but I couldn't think of a way to judiciously apply this combine. This ldrh r0, [r0, #4] strh r0, [r1] becomes vldr d16, [r0] vmov.u16 r0, d16[2] vmov.32 d16[0], r0 vuzp.16 d16, d17 vst1.32 {d16[0]}, [r1, :32] PR11158 rdar://10703339 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154340 91177308-0d34-0410-b5e6-96231b3b80d8
16 lines
570 B
LLVM
16 lines
570 B
LLVM
; RUN: llc < %s -mtriple=thumbv7-apple-ios | FileCheck %s
|
|
; rdar://11035895
|
|
|
|
; DAG combine incorrectly optimize (i32 vextract (v4i16 load $addr), c) to
|
|
; (i16 load $addr+c*sizeof(i16)). It should have issued an extload instead. i.e.
|
|
; (i32 extload $addr+c*sizeof(i16)
|
|
define void @test_hi_short3(<3 x i16> * nocapture %srcA, <2 x i16> * nocapture %dst) nounwind {
|
|
entry:
|
|
; CHECK: vst1.32
|
|
%0 = load <3 x i16> * %srcA, align 8
|
|
%1 = shufflevector <3 x i16> %0, <3 x i16> undef, <2 x i32> <i32 2, i32 undef>
|
|
store <2 x i16> %1, <2 x i16> * %dst, align 4
|
|
ret void
|
|
}
|
|
|