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llvm-6502/test/CodeGen/Mips/atomic.ll
Logan Chien 8c4cf40507 Replace the result usages while legalizing cmpxchg. 
We should update the usages to all of the results;
otherwise, we might get assertion failure or SEGV during
the type legalization of ATOMIC_CMP_SWAP_WITH_SUCCESS
with two or more illegal types.

For example, in the following sequence, both i8 and i1
might be illegal in some target, e.g. armv5, mipsel, mips64el,

    %0 = cmpxchg i8* %ptr, i8 %desire, i8 %new monotonic monotonic
    %1 = extractvalue { i8, i1 } %0, 1

Since both i8 and i1 should be legalized, the corresponding
ATOMIC_CMP_SWAP_WITH_SUCCESS dag will be checked/replaced/updated
twice.

If we don't update the usage to *ALL* of the results in the
first round, the DAG for extractvalue might be processed earlier.
The GetPromotedInteger() will result in assertion failure,
because its operand (i.e. the success bit of cmpxchg) is not
promoted beforehand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213569 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-21 17:33:44 +00:00

435 lines
16 KiB
LLVM
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; RUN: llc -march=mipsel --disable-machine-licm -mcpu=mips32 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS32-ANY -check-prefix=NO-SEB-SEH -check-prefix=CHECK-EL
; RUN: llc -march=mipsel --disable-machine-licm -mcpu=mips32r2 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS32-ANY -check-prefix=HAS-SEB-SEH -check-prefix=CHECK-EL
; RUN: llc -march=mipsel --disable-machine-licm -mcpu=mips32r6 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS32-ANY -check-prefix=HAS-SEB-SEH -check-prefix=CHECK-EL
; RUN: llc -march=mips64el --disable-machine-licm -mcpu=mips4 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS64-ANY -check-prefix=NO-SEB-SEH -check-prefix=CHECK-EL
; RUN: llc -march=mips64el --disable-machine-licm -mcpu=mips64 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS64-ANY -check-prefix=NO-SEB-SEH -check-prefix=CHECK-EL
; RUN: llc -march=mips64el --disable-machine-licm -mcpu=mips64r2 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS64-ANY -check-prefix=HAS-SEB-SEH -check-prefix=CHECK-EL
; RUN: llc -march=mips64el --disable-machine-licm -mcpu=mips64r6 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS64-ANY -check-prefix=HAS-SEB-SEH -check-prefix=CHECK-EL
; Keep one big-endian check so that we don't reduce testing, but don't add more
; since endianness doesn't affect the body of the atomic operations.
; RUN: llc -march=mips --disable-machine-licm -mcpu=mips32 < %s | FileCheck %s -check-prefix=ALL -check-prefix=MIPS32-ANY -check-prefix=NO-SEB-SEH -check-prefix=CHECK-EB
@x = common global i32 0, align 4
define i32 @AtomicLoadAdd32(i32 %incr) nounwind {
entry:
%0 = atomicrmw add i32* @x, i32 %incr monotonic
ret i32 %0
; ALL-LABEL: AtomicLoadAdd32:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(x)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(x)(
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R1:[0-9]+]], 0($[[R0]])
; ALL: addu $[[R2:[0-9]+]], $[[R1]], $4
; ALL: sc $[[R2]], 0($[[R0]])
; ALL: beqz $[[R2]], $[[BB0]]
}
define i32 @AtomicLoadNand32(i32 %incr) nounwind {
entry:
%0 = atomicrmw nand i32* @x, i32 %incr monotonic
ret i32 %0
; ALL-LABEL: AtomicLoadNand32:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(x)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(x)(
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R1:[0-9]+]], 0($[[R0]])
; ALL: and $[[R3:[0-9]+]], $[[R1]], $4
; ALL: nor $[[R2:[0-9]+]], $zero, $[[R3]]
; ALL: sc $[[R2]], 0($[[R0]])
; ALL: beqz $[[R2]], $[[BB0]]
}
define i32 @AtomicSwap32(i32 %newval) nounwind {
entry:
%newval.addr = alloca i32, align 4
store i32 %newval, i32* %newval.addr, align 4
%tmp = load i32* %newval.addr, align 4
%0 = atomicrmw xchg i32* @x, i32 %tmp monotonic
ret i32 %0
; ALL-LABEL: AtomicSwap32:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(x)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(x)
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll ${{[0-9]+}}, 0($[[R0]])
; ALL: sc $[[R2:[0-9]+]], 0($[[R0]])
; ALL: beqz $[[R2]], $[[BB0]]
}
define i32 @AtomicCmpSwap32(i32 %oldval, i32 %newval) nounwind {
entry:
%newval.addr = alloca i32, align 4
store i32 %newval, i32* %newval.addr, align 4
%tmp = load i32* %newval.addr, align 4
%0 = cmpxchg i32* @x, i32 %oldval, i32 %tmp monotonic monotonic
%1 = extractvalue { i32, i1 } %0, 0
ret i32 %1
; ALL-LABEL: AtomicCmpSwap32:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(x)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(x)(
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $2, 0($[[R0]])
; ALL: bne $2, $4, $[[BB1:[A-Z_0-9]+]]
; ALL: sc $[[R2:[0-9]+]], 0($[[R0]])
; ALL: beqz $[[R2]], $[[BB0]]
; ALL: $[[BB1]]:
}
@y = common global i8 0, align 1
define signext i8 @AtomicLoadAdd8(i8 signext %incr) nounwind {
entry:
%0 = atomicrmw add i8* @y, i8 %incr monotonic
ret i8 %0
; ALL-LABEL: AtomicLoadAdd8:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(y)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(y)(
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $[[R0]], $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $[[R0]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 3
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 255
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: sllv $[[R9:[0-9]+]], $4, $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R10:[0-9]+]], 0($[[R2]])
; ALL: addu $[[R11:[0-9]+]], $[[R10]], $[[R9]]
; ALL: and $[[R12:[0-9]+]], $[[R11]], $[[R7]]
; ALL: and $[[R13:[0-9]+]], $[[R10]], $[[R8]]
; ALL: or $[[R14:[0-9]+]], $[[R13]], $[[R12]]
; ALL: sc $[[R14]], 0($[[R2]])
; ALL: beqz $[[R14]], $[[BB0]]
; ALL: and $[[R15:[0-9]+]], $[[R10]], $[[R7]]
; ALL: srlv $[[R16:[0-9]+]], $[[R15]], $[[R5]]
; NO-SEB-SEH: sll $[[R17:[0-9]+]], $[[R16]], 24
; NO-SEB-SEH: sra $2, $[[R17]], 24
; HAS-SEB-SEH: seb $2, $[[R16]]
}
define signext i8 @AtomicLoadSub8(i8 signext %incr) nounwind {
entry:
%0 = atomicrmw sub i8* @y, i8 %incr monotonic
ret i8 %0
; ALL-LABEL: AtomicLoadSub8:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(y)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(y)(
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $[[R0]], $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $[[R0]], 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 3
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 255
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: sllv $[[R9:[0-9]+]], $4, $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R10:[0-9]+]], 0($[[R2]])
; ALL: subu $[[R11:[0-9]+]], $[[R10]], $[[R9]]
; ALL: and $[[R12:[0-9]+]], $[[R11]], $[[R7]]
; ALL: and $[[R13:[0-9]+]], $[[R10]], $[[R8]]
; ALL: or $[[R14:[0-9]+]], $[[R13]], $[[R12]]
; ALL: sc $[[R14]], 0($[[R2]])
; ALL: beqz $[[R14]], $[[BB0]]
; ALL: and $[[R15:[0-9]+]], $[[R10]], $[[R7]]
; ALL: srlv $[[R16:[0-9]+]], $[[R15]], $[[R5]]
; NO-SEB-SEH: sll $[[R17:[0-9]+]], $[[R16]], 24
; NO-SEB-SEH: sra $2, $[[R17]], 24
; HAS-SEB-SEH:seb $2, $[[R16]]
}
define signext i8 @AtomicLoadNand8(i8 signext %incr) nounwind {
entry:
%0 = atomicrmw nand i8* @y, i8 %incr monotonic
ret i8 %0
; ALL-LABEL: AtomicLoadNand8:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(y)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(y)(
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $[[R0]], $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $[[R0]], 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 3
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 255
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: sllv $[[R9:[0-9]+]], $4, $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R10:[0-9]+]], 0($[[R2]])
; ALL: and $[[R18:[0-9]+]], $[[R10]], $[[R9]]
; ALL: nor $[[R11:[0-9]+]], $zero, $[[R18]]
; ALL: and $[[R12:[0-9]+]], $[[R11]], $[[R7]]
; ALL: and $[[R13:[0-9]+]], $[[R10]], $[[R8]]
; ALL: or $[[R14:[0-9]+]], $[[R13]], $[[R12]]
; ALL: sc $[[R14]], 0($[[R2]])
; ALL: beqz $[[R14]], $[[BB0]]
; ALL: and $[[R15:[0-9]+]], $[[R10]], $[[R7]]
; ALL: srlv $[[R16:[0-9]+]], $[[R15]], $[[R5]]
; NO-SEB-SEH: sll $[[R17:[0-9]+]], $[[R16]], 24
; NO-SEB-SEH: sra $2, $[[R17]], 24
; HAS-SEB-SEH: seb $2, $[[R16]]
}
define signext i8 @AtomicSwap8(i8 signext %newval) nounwind {
entry:
%0 = atomicrmw xchg i8* @y, i8 %newval monotonic
ret i8 %0
; ALL-LABEL: AtomicSwap8:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(y)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(y)(
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $[[R0]], $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $[[R0]], 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 3
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 255
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: sllv $[[R9:[0-9]+]], $4, $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R10:[0-9]+]], 0($[[R2]])
; ALL: and $[[R18:[0-9]+]], $[[R9]], $[[R7]]
; ALL: and $[[R13:[0-9]+]], $[[R10]], $[[R8]]
; ALL: or $[[R14:[0-9]+]], $[[R13]], $[[R18]]
; ALL: sc $[[R14]], 0($[[R2]])
; ALL: beqz $[[R14]], $[[BB0]]
; ALL: and $[[R15:[0-9]+]], $[[R10]], $[[R7]]
; ALL: srlv $[[R16:[0-9]+]], $[[R15]], $[[R5]]
; NO-SEB-SEH: sll $[[R17:[0-9]+]], $[[R16]], 24
; NO-SEB-SEH: sra $2, $[[R17]], 24
; HAS-SEB-SEH: seb $2, $[[R16]]
}
define signext i8 @AtomicCmpSwap8(i8 signext %oldval, i8 signext %newval) nounwind {
entry:
%pair0 = cmpxchg i8* @y, i8 %oldval, i8 %newval monotonic monotonic
%0 = extractvalue { i8, i1 } %pair0, 0
ret i8 %0
; ALL-LABEL: AtomicCmpSwap8:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(y)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(y)(
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $[[R0]], $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $[[R0]], 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 3
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 255
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: andi $[[R9:[0-9]+]], $4, 255
; ALL: sllv $[[R10:[0-9]+]], $[[R9]], $[[R5]]
; ALL: andi $[[R11:[0-9]+]], $5, 255
; ALL: sllv $[[R12:[0-9]+]], $[[R11]], $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R13:[0-9]+]], 0($[[R2]])
; ALL: and $[[R14:[0-9]+]], $[[R13]], $[[R7]]
; ALL: bne $[[R14]], $[[R10]], $[[BB1:[A-Z_0-9]+]]
; ALL: and $[[R15:[0-9]+]], $[[R13]], $[[R8]]
; ALL: or $[[R16:[0-9]+]], $[[R15]], $[[R12]]
; ALL: sc $[[R16]], 0($[[R2]])
; ALL: beqz $[[R16]], $[[BB0]]
; ALL: $[[BB1]]:
; ALL: srlv $[[R17:[0-9]+]], $[[R14]], $[[R5]]
; NO-SEB-SEH: sll $[[R18:[0-9]+]], $[[R17]], 24
; NO-SEB-SEH: sra $2, $[[R18]], 24
; HAS-SEB-SEH: seb $2, $[[R17]]
}
define i1 @AtomicCmpSwapRes8(i8* %ptr, i8 %oldval, i8 signext %newval) nounwind {
entry:
%0 = cmpxchg i8* %ptr, i8 %oldval, i8 %newval monotonic monotonic
%1 = extractvalue { i8, i1 } %0, 1
ret i1 %1
; ALL-LABEL: AtomicCmpSwapRes8
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $4, $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $4, 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 3
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 255
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: andi $[[R9:[0-9]+]], $5, 255
; ALL: sllv $[[R10:[0-9]+]], $[[R9]], $[[R5]]
; ALL: andi $[[R11:[0-9]+]], $6, 255
; ALL: sllv $[[R12:[0-9]+]], $[[R11]], $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R13:[0-9]+]], 0($[[R2]])
; ALL: and $[[R14:[0-9]+]], $[[R13]], $[[R7]]
; ALL: bne $[[R14]], $[[R10]], $[[BB1:[A-Z_0-9]+]]
; ALL: and $[[R15:[0-9]+]], $[[R13]], $[[R8]]
; ALL: or $[[R16:[0-9]+]], $[[R15]], $[[R12]]
; ALL: sc $[[R16]], 0($[[R2]])
; ALL: beqz $[[R16]], $[[BB0]]
; ALL: $[[BB1]]:
; ALL: srlv $[[R17:[0-9]+]], $[[R14]], $[[R5]]
; NO-SEB-SEH: sll $[[R18:[0-9]+]], $[[R17]], 24
; NO-SEB-SEH: sra $[[R19:[0-9]+]], $[[R18]], 24
; HAS-SEB-SEH: seb $[[R19:[0-9]+]], $[[R17]]
; ALL: xor $[[R20:[0-9]+]], $[[R19]], $5
; ALL: sltiu $2, $[[R20]], 1
}
; Check one i16 so that we cover the seh sign extend
@z = common global i16 0, align 1
define signext i16 @AtomicLoadAdd16(i16 signext %incr) nounwind {
entry:
%0 = atomicrmw add i16* @z, i16 %incr monotonic
ret i16 %0
; ALL-LABEL: AtomicLoadAdd16:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(z)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(z)(
; ALL: addiu $[[R1:[0-9]+]], $zero, -4
; ALL: and $[[R2:[0-9]+]], $[[R0]], $[[R1]]
; ALL: andi $[[R3:[0-9]+]], $[[R0]], 3
; CHECK-EB: xori $[[R4:[0-9]+]], $[[R3]], 2
; CHECK-EB: sll $[[R5:[0-9]+]], $[[R4]], 3
; CHECK-EL: sll $[[R5:[0-9]+]], $[[R3]], 3
; ALL: ori $[[R6:[0-9]+]], $zero, 65535
; ALL: sllv $[[R7:[0-9]+]], $[[R6]], $[[R5]]
; ALL: nor $[[R8:[0-9]+]], $zero, $[[R7]]
; ALL: sllv $[[R9:[0-9]+]], $4, $[[R5]]
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R10:[0-9]+]], 0($[[R2]])
; ALL: addu $[[R11:[0-9]+]], $[[R10]], $[[R9]]
; ALL: and $[[R12:[0-9]+]], $[[R11]], $[[R7]]
; ALL: and $[[R13:[0-9]+]], $[[R10]], $[[R8]]
; ALL: or $[[R14:[0-9]+]], $[[R13]], $[[R12]]
; ALL: sc $[[R14]], 0($[[R2]])
; ALL: beqz $[[R14]], $[[BB0]]
; ALL: and $[[R15:[0-9]+]], $[[R10]], $[[R7]]
; ALL: srlv $[[R16:[0-9]+]], $[[R15]], $[[R5]]
; NO-SEB-SEH: sll $[[R17:[0-9]+]], $[[R16]], 16
; NO-SEB-SEH: sra $2, $[[R17]], 16
; MIPS32R2: seh $2, $[[R16]]
}
@countsint = common global i32 0, align 4
define i32 @CheckSync(i32 %v) nounwind noinline {
entry:
%0 = atomicrmw add i32* @countsint, i32 %v seq_cst
ret i32 %0
; ALL-LABEL: CheckSync:
; ALL: sync
; ALL: ll
; ALL: sc
; ALL: beq
; ALL: sync
}
; make sure that this assertion in
; TwoAddressInstructionPass::TryInstructionTransform does not fail:
;
; line 1203: assert(TargetRegisterInfo::isVirtualRegister(regB) &&
;
; it failed when MipsDAGToDAGISel::ReplaceUsesWithZeroReg replaced an
; operand of an atomic instruction with register $zero.
@a = external global i32
define i32 @zeroreg() nounwind {
entry:
%pair0 = cmpxchg i32* @a, i32 1, i32 0 seq_cst seq_cst
%0 = extractvalue { i32, i1 } %pair0, 0
%1 = icmp eq i32 %0, 1
%conv = zext i1 %1 to i32
ret i32 %conv
}
; Check that MIPS32R6 has the correct offset range.
; FIXME: At the moment, we don't seem to do addr+offset for any atomic load/store.
define i32 @AtomicLoadAdd32_OffGt9Bit(i32 %incr) nounwind {
entry:
%0 = atomicrmw add i32* getelementptr(i32* @x, i32 256), i32 %incr monotonic
ret i32 %0
; ALL-LABEL: AtomicLoadAdd32_OffGt9Bit:
; MIPS32-ANY: lw $[[R0:[0-9]+]], %got(x)
; MIPS64-ANY: ld $[[R0:[0-9]+]], %got_disp(x)(
; ALL: addiu $[[PTR:[0-9]+]], $[[R0]], 1024
; ALL: $[[BB0:[A-Z_0-9]+]]:
; ALL: ll $[[R1:[0-9]+]], 0($[[PTR]])
; ALL: addu $[[R2:[0-9]+]], $[[R1]], $4
; ALL: sc $[[R2]], 0($[[PTR]])
; ALL: beqz $[[R2]], $[[BB0]]
}
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