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Support generic lowering of vector bswap

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llvm-svn: 319419
This commit is contained in:
Serge Guelton 2017-11-30 11:06:22 +00:00
parent f231f5c5e5
commit ddb7e7b222
2 changed files with 60 additions and 10 deletions
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20
lib/CodeGen/IntrinsicLowering.cpp
View File

@ -164,9 +164,9 @@ void IntrinsicLowering::AddPrototypes(Module &M) {
/// LowerBSWAP - Emit the code to lower bswap of V before the specified
/// instruction IP.
static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) {
assert(V->getType()->isIntegerTy() && "Can't bswap a non-integer type!");
assert(V->getType()->isIntOrIntVectorTy() && "Can't bswap a non-integer type!");
unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
unsigned BitSize = V->getType()->getScalarSizeInBits();
IRBuilder<> Builder(IP);
@ -190,10 +190,10 @@ static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) {
Value *Tmp1 = Builder.CreateLShr(V,ConstantInt::get(V->getType(), 24),
"bswap.1");
Tmp3 = Builder.CreateAnd(Tmp3,
ConstantInt::get(Type::getInt32Ty(Context), 0xFF0000),
ConstantInt::get(V->getType(), 0xFF0000),
"bswap.and3");
Tmp2 = Builder.CreateAnd(Tmp2,
ConstantInt::get(Type::getInt32Ty(Context), 0xFF00),
ConstantInt::get(V->getType(), 0xFF00),
"bswap.and2");
Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or1");
Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or2");
@ -221,27 +221,27 @@ static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) {
ConstantInt::get(V->getType(), 56),
"bswap.1");
Tmp7 = Builder.CreateAnd(Tmp7,
ConstantInt::get(Type::getInt64Ty(Context),
ConstantInt::get(V->getType(),
0xFF000000000000ULL),
"bswap.and7");
Tmp6 = Builder.CreateAnd(Tmp6,
ConstantInt::get(Type::getInt64Ty(Context),
ConstantInt::get(V->getType(),
0xFF0000000000ULL),
"bswap.and6");
Tmp5 = Builder.CreateAnd(Tmp5,
ConstantInt::get(Type::getInt64Ty(Context),
ConstantInt::get(V->getType(),
0xFF00000000ULL),
"bswap.and5");
Tmp4 = Builder.CreateAnd(Tmp4,
ConstantInt::get(Type::getInt64Ty(Context),
ConstantInt::get(V->getType(),
0xFF000000ULL),
"bswap.and4");
Tmp3 = Builder.CreateAnd(Tmp3,
ConstantInt::get(Type::getInt64Ty(Context),
ConstantInt::get(V->getType(),
0xFF0000ULL),
"bswap.and3");
Tmp2 = Builder.CreateAnd(Tmp2,
ConstantInt::get(Type::getInt64Ty(Context),
ConstantInt::get(V->getType(),
0xFF00ULL),
"bswap.and2");
Tmp8 = Builder.CreateOr(Tmp8, Tmp7, "bswap.or1");

50
test/CodeGen/Generic/bswap.ll Normal file
View File

@ -0,0 +1,50 @@
; tests lowering of vector bswap
; RUN: lli -force-interpreter %s | FileCheck %s
; CHECK: 0x100
; CHECK: 0x10000
; CHECK: 0x1001000000000000
; CHECK: 0x100
; CHECK: 0x10000
; CHECK: 0x1001000000000000
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
declare i16 @llvm.bswap.i16(i16);
declare i32 @llvm.bswap.i32(i32);
declare i64 @llvm.bswap.i64(i64);
declare <4 x i16> @llvm.bswap.v4i16(<4 x i16>);
declare <4 x i32> @llvm.bswap.v4i32(<4 x i32>);
declare <4 x i64> @llvm.bswap.v4i64(<4 x i64>);
declare i32 @printf(i8* nocapture readonly, ...);
@.str = private unnamed_addr constant [5 x i8] c"%#x\0A\00", align 1
@.strs = private unnamed_addr constant [6 x i8] c"%#hx\0A\00", align 1
@.strl = private unnamed_addr constant [6 x i8] c"%#lx\0A\00", align 1
define i32 @main() local_unnamed_addr {
%ra = tail call i16 @llvm.bswap.i16(i16 1)
%pa = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.strs, i64 0, i64 0), i16 %ra)
%rb = tail call i32 @llvm.bswap.i32(i32 256)
%pb = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %rb)
%rc = tail call i64 @llvm.bswap.i64(i64 272)
%pc = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.strl, i64 0, i64 0), i64 %rc)
%r0 = tail call <4 x i16> @llvm.bswap.v4i16(<4 x i16> <i16 1, i16 1, i16 1, i16 1>)
%e0 = extractelement <4 x i16> %r0, i8 0
%p0 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.strs, i64 0, i64 0), i16 %e0)
%r1 = tail call <4 x i32> @llvm.bswap.v4i32(<4 x i32> <i32 256, i32 256, i32 256, i32 256>)
%e1 = extractelement <4 x i32> %r1, i8 1
%p1 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %e1)
%r2 = tail call <4 x i64> @llvm.bswap.v4i64(<4 x i64> <i64 272, i64 272, i64 272, i64 272>)
%e2 = extractelement <4 x i64> %r2, i8 2
%p2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.strl, i64 0, i64 0), i64 %e2)
ret i32 0
}