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[SelectionDAG] Added bitreverse(bitreverse(v)) --> v
Added bitreverse creation testing llvm-svn: 268865
This commit is contained in:
Simon Pilgrim
parent
7b7547a4dc
commit
2b77907462
@ -259,6 +259,7 @@ namespace {
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SDValue visitSRL(SDNode *N);
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SDValue visitRotate(SDNode *N);
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SDValue visitBSWAP(SDNode *N);
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SDValue visitBITREVERSE(SDNode *N);
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SDValue visitCTLZ(SDNode *N);
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SDValue visitCTLZ_ZERO_UNDEF(SDNode *N);
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SDValue visitCTTZ(SDNode *N);
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@ -1392,6 +1393,7 @@ SDValue DAGCombiner::visit(SDNode *N) {
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case ISD::ROTR:
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case ISD::ROTL: return visitRotate(N);
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case ISD::BSWAP: return visitBSWAP(N);
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case ISD::BITREVERSE: return visitBITREVERSE(N);
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case ISD::CTLZ: return visitCTLZ(N);
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case ISD::CTLZ_ZERO_UNDEF: return visitCTLZ_ZERO_UNDEF(N);
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case ISD::CTTZ: return visitCTTZ(N);
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@ -4976,6 +4978,16 @@ SDValue DAGCombiner::visitBSWAP(SDNode *N) {
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return SDValue();
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}
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SDValue DAGCombiner::visitBITREVERSE(SDNode *N) {
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SDValue N0 = N->getOperand(0);
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EVT VT = N->getValueType(0);
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// fold (bitreverse (bitreverse x)) -> x
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if (N0.getOpcode() == ISD::BITREVERSE)
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return N0.getOperand(0);
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return SDValue();
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}
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SDValue DAGCombiner::visitCTLZ(SDNode *N) {
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SDValue N0 = N->getOperand(0);
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EVT VT = N->getValueType(0);
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@ -3146,6 +3146,12 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL,
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if (OpOpcode == ISD::UNDEF)
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return getUNDEF(VT);
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break;
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case ISD::BITREVERSE:
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assert(VT.isInteger() && VT == Operand.getValueType() &&
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"Invalid BITREVERSE!");
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if (OpOpcode == ISD::UNDEF)
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return getUNDEF(VT);
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break;
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case ISD::BITCAST:
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// Basic sanity checking.
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assert(VT.getSizeInBits() == Operand.getValueType().getSizeInBits()
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@ -48,62 +48,6 @@ define i8 @identity_i8(i8 %a) {
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; CHECK-LABEL: identity_i8:
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; CHECK: # BB#0:
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; CHECK-NEXT: movb {{[0-9]+}}(%esp), %al
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; CHECK-NEXT: movl %eax, %ecx
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; CHECK-NEXT: shlb $7, %cl
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: shlb $5, %dl
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; CHECK-NEXT: andb $64, %dl
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; CHECK-NEXT: movb %al, %ah
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; CHECK-NEXT: shlb $3, %ah
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; CHECK-NEXT: andb $32, %ah
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; CHECK-NEXT: orb %dl, %ah
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: addb %dl, %dl
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; CHECK-NEXT: andb $16, %dl
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; CHECK-NEXT: orb %ah, %dl
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; CHECK-NEXT: movb %al, %ah
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; CHECK-NEXT: shrb %ah
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; CHECK-NEXT: andb $8, %ah
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; CHECK-NEXT: orb %dl, %ah
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: shrb $3, %dl
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; CHECK-NEXT: andb $4, %dl
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; CHECK-NEXT: orb %ah, %dl
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; CHECK-NEXT: movb %al, %ah
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; CHECK-NEXT: shrb $5, %ah
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; CHECK-NEXT: andb $2, %ah
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; CHECK-NEXT: orb %dl, %ah
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; CHECK-NEXT: shrb $7, %al
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; CHECK-NEXT: orb %ah, %al
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; CHECK-NEXT: orb %cl, %al
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; CHECK-NEXT: movl %eax, %ecx
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; CHECK-NEXT: shlb $7, %cl
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: shlb $5, %dl
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; CHECK-NEXT: andb $64, %dl
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; CHECK-NEXT: movb %al, %ah
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; CHECK-NEXT: shlb $3, %ah
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; CHECK-NEXT: andb $32, %ah
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; CHECK-NEXT: orb %dl, %ah
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: addb %dl, %dl
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; CHECK-NEXT: andb $16, %dl
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; CHECK-NEXT: orb %ah, %dl
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; CHECK-NEXT: movb %al, %ah
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; CHECK-NEXT: shrb %ah
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; CHECK-NEXT: andb $8, %ah
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; CHECK-NEXT: orb %dl, %ah
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: shrb $3, %dl
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; CHECK-NEXT: andb $4, %dl
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; CHECK-NEXT: orb %ah, %dl
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; CHECK-NEXT: movb %al, %ah
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; CHECK-NEXT: shrb $5, %ah
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; CHECK-NEXT: andb $2, %ah
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; CHECK-NEXT: orb %dl, %ah
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; CHECK-NEXT: shrb $7, %al
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; CHECK-NEXT: orb %ah, %al
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; CHECK-NEXT: orb %cl, %al
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; CHECK-NEXT: retl
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%b = call i8 @llvm.bitreverse.i8(i8 %a)
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%c = call i8 @llvm.bitreverse.i8(i8 %b)
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@ -113,272 +57,28 @@ define i8 @identity_i8(i8 %a) {
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define <2 x i16> @identity_v2i16(<2 x i16> %a) {
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; CHECK-LABEL: identity_v2i16:
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; CHECK: # BB#0:
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; CHECK-NEXT: pushl %ebp
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; CHECK-NEXT: .Ltmp4:
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: pushl %ebx
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; CHECK-NEXT: .Ltmp5:
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; CHECK-NEXT: .cfi_def_cfa_offset 12
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; CHECK-NEXT: pushl %edi
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; CHECK-NEXT: .Ltmp6:
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: pushl %esi
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; CHECK-NEXT: .Ltmp7:
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; CHECK-NEXT: .cfi_def_cfa_offset 20
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; CHECK-NEXT: .Ltmp8:
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; CHECK-NEXT: .cfi_offset %esi, -20
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; CHECK-NEXT: .Ltmp9:
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; CHECK-NEXT: .cfi_offset %edi, -16
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; CHECK-NEXT: .Ltmp10:
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; CHECK-NEXT: .cfi_offset %ebx, -12
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; CHECK-NEXT: .Ltmp11:
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; CHECK-NEXT: .cfi_offset %ebp, -8
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; CHECK-NEXT: movzwl {{[0-9]+}}(%esp), %esi
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; CHECK-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: shll $15, %eax
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: andl $2, %edx
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; CHECK-NEXT: shll $13, %edx
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; CHECK-NEXT: orl %eax, %edx
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: andl $4, %eax
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; CHECK-NEXT: shll $11, %eax
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; CHECK-NEXT: orl %edx, %eax
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: andl $8, %edx
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; CHECK-NEXT: shll $9, %edx
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; CHECK-NEXT: orl %eax, %edx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: andl $16, %edi
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; CHECK-NEXT: shll $7, %edi
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; CHECK-NEXT: orl %edx, %edi
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: andl $32, %eax
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; CHECK-NEXT: shll $5, %eax
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; CHECK-NEXT: orl %edi, %eax
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: andl $64, %edx
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; CHECK-NEXT: shll $3, %edx
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; CHECK-NEXT: leal (%ecx,%ecx), %edi
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; CHECK-NEXT: andl $256, %edi # imm = 0x100
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; CHECK-NEXT: orl %edx, %edi
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: shrl %edx
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; CHECK-NEXT: andl $128, %edx
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; CHECK-NEXT: orl %edi, %edx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: shrl $3, %edi
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; CHECK-NEXT: andl $64, %edi
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; CHECK-NEXT: orl %edx, %edi
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: shrl $5, %edx
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; CHECK-NEXT: andl $32, %edx
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; CHECK-NEXT: orl %edi, %edx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: shrl $7, %edi
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; CHECK-NEXT: andl $16, %edi
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; CHECK-NEXT: orl %edx, %edi
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: shrl $9, %edx
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; CHECK-NEXT: andl $8, %edx
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; CHECK-NEXT: orl %edi, %edx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: shrl $11, %edi
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; CHECK-NEXT: andl $4, %edi
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; CHECK-NEXT: orl %edx, %edi
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: shrl $13, %edx
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; CHECK-NEXT: andl $2, %edx
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; CHECK-NEXT: orl %edi, %edx
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; CHECK-NEXT: shrl $15, %ecx
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; CHECK-NEXT: orl %edx, %ecx
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; CHECK-NEXT: orl %eax, %ecx
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; CHECK-NEXT: movl %ecx, %edx
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; CHECK-NEXT: andl $32768, %edx # imm = 0x8000
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; CHECK-NEXT: movl %esi, %eax
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; CHECK-NEXT: shll $15, %eax
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: andl $2, %edi
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; CHECK-NEXT: shll $13, %edi
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; CHECK-NEXT: orl %eax, %edi
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; CHECK-NEXT: movl %esi, %eax
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; CHECK-NEXT: andl $4, %eax
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; CHECK-NEXT: shll $11, %eax
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; CHECK-NEXT: orl %edi, %eax
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: andl $8, %edi
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; CHECK-NEXT: shll $9, %edi
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; CHECK-NEXT: orl %eax, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: andl $16, %ebx
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; CHECK-NEXT: shll $7, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %eax
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; CHECK-NEXT: andl $32, %eax
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; CHECK-NEXT: shll $5, %eax
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; CHECK-NEXT: orl %ebx, %eax
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: andl $64, %edi
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; CHECK-NEXT: shll $3, %edi
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; CHECK-NEXT: leal (%esi,%esi), %ebx
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; CHECK-NEXT: andl $256, %ebx # imm = 0x100
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: shrl %edi
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; CHECK-NEXT: andl $128, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: shrl $3, %ebx
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; CHECK-NEXT: andl $64, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: shrl $5, %edi
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; CHECK-NEXT: andl $32, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: shrl $7, %ebx
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; CHECK-NEXT: andl $16, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: shrl $9, %edi
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; CHECK-NEXT: andl $8, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: shrl $11, %ebx
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; CHECK-NEXT: andl $4, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: shrl $13, %edi
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; CHECK-NEXT: andl $2, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: shrl $15, %esi
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; CHECK-NEXT: orl %edi, %esi
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; CHECK-NEXT: orl %eax, %esi
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; CHECK-NEXT: movl %esi, %eax
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; CHECK-NEXT: andl $32768, %eax # imm = 0x8000
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: shll $15, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: andl $2, %ebx
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; CHECK-NEXT: shll $13, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: andl $4, %edi
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; CHECK-NEXT: shll $11, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: andl $8, %ebx
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; CHECK-NEXT: shll $9, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %esi, %ebp
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; CHECK-NEXT: andl $16, %ebp
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; CHECK-NEXT: shll $7, %ebp
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; CHECK-NEXT: orl %ebx, %ebp
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; CHECK-NEXT: movl %esi, %edi
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; CHECK-NEXT: andl $32, %edi
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; CHECK-NEXT: shll $5, %edi
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; CHECK-NEXT: orl %ebp, %edi
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: andl $64, %ebx
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; CHECK-NEXT: shll $3, %ebx
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; CHECK-NEXT: leal (%esi,%esi), %ebp
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; CHECK-NEXT: andl $256, %ebp # imm = 0x100
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; CHECK-NEXT: orl %ebx, %ebp
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: shrl %ebx
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; CHECK-NEXT: andl $128, %ebx
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; CHECK-NEXT: orl %ebp, %ebx
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; CHECK-NEXT: movl %esi, %ebp
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; CHECK-NEXT: shrl $3, %ebp
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; CHECK-NEXT: andl $64, %ebp
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; CHECK-NEXT: orl %ebx, %ebp
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: shrl $5, %ebx
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; CHECK-NEXT: andl $32, %ebx
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; CHECK-NEXT: orl %ebp, %ebx
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; CHECK-NEXT: movl %esi, %ebp
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; CHECK-NEXT: shrl $7, %ebp
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; CHECK-NEXT: andl $16, %ebp
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; CHECK-NEXT: orl %ebx, %ebp
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; CHECK-NEXT: movl %esi, %ebx
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; CHECK-NEXT: shrl $9, %ebx
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; CHECK-NEXT: andl $8, %ebx
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; CHECK-NEXT: orl %ebp, %ebx
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; CHECK-NEXT: movl %esi, %ebp
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; CHECK-NEXT: shrl $11, %ebp
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; CHECK-NEXT: andl $4, %ebp
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; CHECK-NEXT: orl %ebx, %ebp
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; CHECK-NEXT: shrl $13, %esi
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; CHECK-NEXT: andl $2, %esi
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; CHECK-NEXT: orl %ebp, %esi
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; CHECK-NEXT: shrl $15, %eax
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; CHECK-NEXT: orl %esi, %eax
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; CHECK-NEXT: orl %edi, %eax
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; CHECK-NEXT: movl %ecx, %esi
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; CHECK-NEXT: shll $15, %esi
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: andl $2, %edi
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; CHECK-NEXT: shll $13, %edi
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; CHECK-NEXT: orl %esi, %edi
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; CHECK-NEXT: movl %ecx, %esi
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; CHECK-NEXT: andl $4, %esi
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; CHECK-NEXT: shll $11, %esi
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; CHECK-NEXT: orl %edi, %esi
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: andl $8, %edi
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; CHECK-NEXT: shll $9, %edi
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; CHECK-NEXT: orl %esi, %edi
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; CHECK-NEXT: movl %ecx, %ebx
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; CHECK-NEXT: andl $16, %ebx
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; CHECK-NEXT: shll $7, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %ecx, %esi
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; CHECK-NEXT: andl $32, %esi
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; CHECK-NEXT: shll $5, %esi
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; CHECK-NEXT: orl %ebx, %esi
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: andl $64, %edi
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; CHECK-NEXT: shll $3, %edi
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; CHECK-NEXT: leal (%ecx,%ecx), %ebx
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; CHECK-NEXT: andl $256, %ebx # imm = 0x100
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: shrl %edi
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; CHECK-NEXT: andl $128, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %ecx, %ebx
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; CHECK-NEXT: shrl $3, %ebx
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; CHECK-NEXT: andl $64, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: shrl $5, %edi
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; CHECK-NEXT: andl $32, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %ecx, %ebx
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; CHECK-NEXT: shrl $7, %ebx
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; CHECK-NEXT: andl $16, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: shrl $9, %edi
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; CHECK-NEXT: andl $8, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: movl %ecx, %ebx
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; CHECK-NEXT: shrl $11, %ebx
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; CHECK-NEXT: andl $4, %ebx
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; CHECK-NEXT: orl %edi, %ebx
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; CHECK-NEXT: shrl $13, %ecx
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; CHECK-NEXT: andl $2, %ecx
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; CHECK-NEXT: orl %ebx, %ecx
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; CHECK-NEXT: shrl $15, %edx
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; CHECK-NEXT: orl %ecx, %edx
|
||||
; CHECK-NEXT: orl %esi, %edx
|
||||
; CHECK-NEXT: popl %esi
|
||||
; CHECK-NEXT: popl %edi
|
||||
; CHECK-NEXT: popl %ebx
|
||||
; CHECK-NEXT: popl %ebp
|
||||
; CHECK-NEXT: movzwl {{[0-9]+}}(%esp), %eax
|
||||
; CHECK-NEXT: movzwl {{[0-9]+}}(%esp), %edx
|
||||
; CHECK-NEXT: retl
|
||||
%b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %a)
|
||||
%c = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %b)
|
||||
ret <2 x i16> %c
|
||||
}
|
||||
|
||||
; These tests check that bitreverse(undef) calls are removed
|
||||
|
||||
define i8 @undef_i8() {
|
||||
; CHECK-LABEL: undef_i8:
|
||||
; CHECK: # BB#0:
|
||||
; CHECK-NEXT: retl
|
||||
%b = call i8 @llvm.bitreverse.i8(i8 undef)
|
||||
ret i8 %b
|
||||
}
|
||||
|
||||
define <2 x i16> @undef_v2i16() {
|
||||
; CHECK-LABEL: undef_v2i16:
|
||||
; CHECK: # BB#0:
|
||||
; CHECK-NEXT: retl
|
||||
%b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> undef)
|
||||
ret <2 x i16> %b
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user