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Revert "Revert "ARM: Improve pattern for isel mul of vector by scalar.""

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This reverts commit r189648.

Fixes for the previously failing clang-side arm_neon_intrinsics test
cases will be checked in separately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189841 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2013-09-03 20:08:17 +00:00
parent bd18c8d090
commit b81d7a8912
2 changed files with 29 additions and 0 deletions
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11
lib/Target/ARM/ARMInstrNEON.td
View File

@ -4022,6 +4022,17 @@ def : Pat<(v4f32 (fmul (v4f32 QPR:$src1),
(DSubReg_i32_reg imm:$lane))),
(SubReg_i32_lane imm:$lane)))>;
def : Pat<(v2f32 (fmul DPR:$Rn, (NEONvdup (f32 SPR:$Rm)))),
(VMULslfd DPR:$Rn,
(INSERT_SUBREG (v2f32 (IMPLICIT_DEF)), SPR:$Rm, ssub_0),
(i32 0))>;
def : Pat<(v4f32 (fmul QPR:$Rn, (NEONvdup (f32 SPR:$Rm)))),
(VMULslfq QPR:$Rn,
(INSERT_SUBREG (v2f32 (IMPLICIT_DEF)), SPR:$Rm, ssub_0),
(i32 0))>;
// VQDMULH : Vector Saturating Doubling Multiply Returning High Half
defm VQDMULH : N3VInt_HS<0, 0, 0b1011, 0, N3RegFrm, IIC_VMULi16D, IIC_VMULi32D,
IIC_VMULi16Q, IIC_VMULi32Q,

18
test/CodeGen/ARM/vmul.ll
View File

@ -623,3 +623,21 @@ entry:
store <4 x i32> %predphi290.v.i, <4 x i32>* undef, align 4
ret void
}
define void @foo(<4 x float> * %a, <4 x float>* nocapture %dst, float* nocapture readonly %src) nounwind {
; Look for doing a normal scalar FP load rather than an to-all-lanes load.
; e.g., "ldr s0, [r2]" rathern than "vld1.32 {d18[], d19[]}, [r2:32]"
; Then check that the vector multiply has folded the splat to all lanes
; and used a vector * scalar instruction.
; CHECK: vldr {{s[0-9]+}}, [r2]
; CHECK: vmul.f32 q8, q8, d0[0]
%tmp = load float* %src, align 4
%tmp5 = load <4 x float>* %a, align 4
%tmp6 = insertelement <4 x float> undef, float %tmp, i32 0
%tmp7 = insertelement <4 x float> %tmp6, float %tmp, i32 1
%tmp8 = insertelement <4 x float> %tmp7, float %tmp, i32 2
%tmp9 = insertelement <4 x float> %tmp8, float %tmp, i32 3
%tmp10 = fmul <4 x float> %tmp9, %tmp5
store <4 x float> %tmp10, <4 x float>* %dst, align 4
ret void
}