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Remove 'llvm.x86.avx2.vbroadcasti128' intrinsic.

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The intrinsic is no longer generated by the front-end. Remove the intrinsic and
auto-upgrade it to a vector shuffle.

Reviewed by Nadav

This is related to rdar://problem/18742778.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231182 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka 2015-03-04 00:13:25 +00:00
parent 258b7710d5
commit e49da9aff1
5 changed files with 30 additions and 14 deletions
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2
include/llvm/IR/IntrinsicsX86.td
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@ -1732,8 +1732,6 @@ let TargetPrefix = "x86" in { // All intrinsics start with "llvm.x86.".
def int_x86_avx2_vbroadcast_ss_ps_256 :
GCCBuiltin<"__builtin_ia32_vbroadcastss_ps256">,
Intrinsic<[llvm_v8f32_ty], [llvm_v4f32_ty], [IntrNoMem]>;
def int_x86_avx2_vbroadcasti128 :
Intrinsic<[llvm_v4i64_ty], [llvm_ptr_ty], [IntrReadArgMem]>;
def int_x86_avx2_pbroadcastb_128 :
GCCBuiltin<"__builtin_ia32_pbroadcastb128">,
Intrinsic<[llvm_v16i8_ty], [llvm_v16i8_ty], [IntrNoMem]>;

12
lib/IR/AutoUpgrade.cpp
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@ -179,6 +179,7 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
Name == "x86.avx2.pblendw" ||
Name == "x86.avx2.pblendd.128" ||
Name == "x86.avx2.pblendd.256" ||
Name == "x86.avx2.vbroadcasti128" ||
(Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
NewFn = nullptr;
return true;
@ -553,6 +554,17 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
for (unsigned I = 0; I < EltNum; ++I)
Rep = Builder.CreateInsertElement(Rep, Load,
ConstantInt::get(I32Ty, I));
} else if (Name == "llvm.x86.avx2.vbroadcasti128") {
// Replace vbroadcasts with a vector shuffle.
Value *Op = Builder.CreatePointerCast(
CI->getArgOperand(0),
PointerType::getUnqual(VectorType::get(Type::getInt64Ty(C), 2)));
Value *Load = Builder.CreateLoad(Op);
SmallVector<Constant *, 4> Idxs; // 0, 1, 0, 1.
for (unsigned i = 0; i != 4; ++i)
Idxs.push_back(Builder.getInt32(i & 1));
Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()),
ConstantVector::get(Idxs));
} else if (Name == "llvm.x86.sse2.psll.dq") {
// 128-bit shift left specified in bits.
unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();

5
lib/Target/X86/X86InstrSSE.td
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@ -7834,11 +7834,6 @@ def VBROADCASTSDYrr : avx2_broadcast_reg<0x19, "vbroadcastsd", VR256,
int_x86_avx2_vbroadcast_sd_pd_256,
WriteFShuffle256>, VEX_L;
let Predicates = [HasAVX2] in
def VBROADCASTI128 : avx_broadcast<0x5A, "vbroadcasti128", VR256, i128mem,
int_x86_avx2_vbroadcasti128, WriteLoad>,
VEX_L;
let Predicates = [HasAVX] in
def : Pat<(int_x86_avx_vbroadcastf128_ps_256 addr:$src),
(VBROADCASTF128 addr:$src)>;

7
test/CodeGen/X86/avx2-intrinsics-x86.ll
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@ -641,13 +641,6 @@ define <4 x i64> @test_x86_avx2_pmul.dq(<8 x i32> %a0, <8 x i32> %a1) {
declare <4 x i64> @llvm.x86.avx2.pmul.dq(<8 x i32>, <8 x i32>) nounwind readnone
define <4 x i64> @test_x86_avx2_vbroadcasti128(i8* %a0) {
; CHECK: vbroadcasti128
%res = call <4 x i64> @llvm.x86.avx2.vbroadcasti128(i8* %a0) ; <<4 x i64>> [#uses=1]
ret <4 x i64> %res
}
declare <4 x i64> @llvm.x86.avx2.vbroadcasti128(i8*) nounwind readonly
define <4 x double> @test_x86_avx2_vbroadcast_sd_pd_256(<2 x double> %a0) {
; CHECK: vbroadcastsd
%res = call <4 x double> @llvm.x86.avx2.vbroadcast.sd.pd.256(<2 x double> %a0) ; <<4 x double>> [#uses=1]

18
test/CodeGen/X86/x86-upgrade-avx2-vbroadcast.ll Normal file
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@ -0,0 +1,18 @@
; RUN: llc -mattr=+avx2 < %s | FileCheck %s
; Check that we properly upgrade the AVX2 vbroadcast intrinsic to IR.
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"
define <4 x i64> @broadcast128(<2 x i64> %src) {
CHECK-LABEL: broadcast128
CHECK: vinsertf128 $1, %xmm0, %ymm0, %ymm0
%1 = alloca <2 x i64>, align 16
%2 = bitcast <2 x i64>* %1 to i8*
store <2 x i64> %src, <2 x i64>* %1, align 16
%3 = call <4 x i64> @llvm.x86.avx2.vbroadcasti128(i8* %2)
ret <4 x i64> %3
}
declare <4 x i64> @llvm.x86.avx2.vbroadcasti128(i8*) #1