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Added getSubRegIndex(A,B) that returns subreg index of A to B. Use it to replace broken code in VirtRegRewriter.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88753 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -464,6 +464,11 @@ public:
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/// exist.
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virtual unsigned getSubReg(unsigned RegNo, unsigned Index) const = 0;
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/// getSubRegIndex - For a given register pair, return the sub-register index
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/// if they are second register is a sub-register of the second. Return zero
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/// otherwise.
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virtual unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const = 0;
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/// getMatchingSuperReg - Return a super-register of the specified register
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/// Reg so its sub-register of index SubIdx is Reg.
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unsigned getMatchingSuperReg(unsigned Reg, unsigned SubIdx,
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@ -841,11 +841,8 @@ unsigned ReuseInfo::GetRegForReload(const TargetRegisterClass *RC,
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"A reuse cannot be a virtual register");
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if (PRRU != RealPhysRegUsed) {
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// What was the sub-register index?
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unsigned SubReg;
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for (SubIdx = 1; (SubReg = TRI->getSubReg(PRRU, SubIdx)); SubIdx++)
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if (SubReg == RealPhysRegUsed)
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break;
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assert(SubReg == RealPhysRegUsed &&
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SubIdx = TRI->getSubRegIndex(PRRU, RealPhysRegUsed);
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assert(SubIdx &&
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"Operand physreg is not a sub-register of PhysRegUsed");
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}
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133
test/CodeGen/X86/2009-11-13-VirtRegRewriterBug.ll
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133
test/CodeGen/X86/2009-11-13-VirtRegRewriterBug.ll
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@ -0,0 +1,133 @@
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; RUN: llc < %s -mtriple=i386-apple-darwin -relocation-model=pic -disable-fp-elim
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; rdar://7394770
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%struct.JVTLib_100487 = type <{ i8 }>
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define i32 @_Z13JVTLib_10335613JVTLib_10266513JVTLib_100579S_S_S_jPhj(i16* nocapture %ResidualX_Array.0, %struct.JVTLib_100487* nocapture byval align 4 %xqp, i16* nocapture %ResidualL_Array.0, i16* %ResidualDCZ_Array.0, i16* nocapture %ResidualACZ_FOArray.0, i32 %useFRextDequant, i8* nocapture %JVTLib_103357, i32 %use_field_scan) ssp {
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bb.nph:
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%0 = shl i32 undef, 1 ; <i32> [#uses=2]
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%mask133.masked.masked.masked.masked.masked.masked = or i640 undef, undef ; <i640> [#uses=1]
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br label %bb
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bb: ; preds = %_ZL13JVTLib_105204PKsPK13JVTLib_105184PsPhjS5_j.exit, %bb.nph
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br i1 undef, label %bb2, label %bb1
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bb1: ; preds = %bb
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br i1 undef, label %bb.i, label %bb1.i
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bb2: ; preds = %bb
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unreachable
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bb.i: ; preds = %bb1
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br label %_ZL13JVTLib_105204PKsPK13JVTLib_105184PsPhjS5_j.exit
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bb1.i: ; preds = %bb1
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br label %_ZL13JVTLib_105204PKsPK13JVTLib_105184PsPhjS5_j.exit
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_ZL13JVTLib_105204PKsPK13JVTLib_105184PsPhjS5_j.exit: ; preds = %bb1.i, %bb.i
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br i1 undef, label %bb5, label %bb
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bb5: ; preds = %_ZL13JVTLib_105204PKsPK13JVTLib_105184PsPhjS5_j.exit
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%mask271.masked.masked.masked.masked.masked.masked.masked = or i256 0, undef ; <i256> [#uses=2]
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%mask266.masked.masked.masked.masked.masked.masked = or i256 %mask271.masked.masked.masked.masked.masked.masked.masked, undef ; <i256> [#uses=1]
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%mask241.masked = or i256 undef, undef ; <i256> [#uses=1]
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%ins237 = or i256 undef, 0 ; <i256> [#uses=1]
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br i1 undef, label %bb9, label %bb10
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bb9: ; preds = %bb5
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br i1 undef, label %bb12.i, label %_ZL13JVTLib_105255PKsPK13JVTLib_105184Psj.exit
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bb12.i: ; preds = %bb9
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br label %_ZL13JVTLib_105255PKsPK13JVTLib_105184Psj.exit
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_ZL13JVTLib_105255PKsPK13JVTLib_105184Psj.exit: ; preds = %bb12.i, %bb9
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ret i32 undef
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bb10: ; preds = %bb5
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%1 = sext i16 undef to i32 ; <i32> [#uses=1]
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%2 = sext i16 undef to i32 ; <i32> [#uses=1]
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%3 = sext i16 undef to i32 ; <i32> [#uses=1]
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%4 = sext i16 undef to i32 ; <i32> [#uses=1]
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%5 = sext i16 undef to i32 ; <i32> [#uses=1]
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%6 = sext i16 undef to i32 ; <i32> [#uses=1]
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%tmp211 = lshr i256 %mask271.masked.masked.masked.masked.masked.masked.masked, 112 ; <i256> [#uses=0]
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%7 = sext i16 undef to i32 ; <i32> [#uses=1]
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%tmp208 = lshr i256 %mask266.masked.masked.masked.masked.masked.masked, 128 ; <i256> [#uses=1]
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%tmp209 = trunc i256 %tmp208 to i16 ; <i16> [#uses=1]
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%8 = sext i16 %tmp209 to i32 ; <i32> [#uses=1]
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%9 = sext i16 undef to i32 ; <i32> [#uses=1]
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%10 = sext i16 undef to i32 ; <i32> [#uses=1]
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%tmp193 = lshr i256 %mask241.masked, 208 ; <i256> [#uses=1]
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%tmp194 = trunc i256 %tmp193 to i16 ; <i16> [#uses=1]
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%11 = sext i16 %tmp194 to i32 ; <i32> [#uses=1]
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%tmp187 = lshr i256 %ins237, 240 ; <i256> [#uses=1]
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%tmp188 = trunc i256 %tmp187 to i16 ; <i16> [#uses=1]
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%12 = sext i16 %tmp188 to i32 ; <i32> [#uses=1]
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%13 = add nsw i32 %4, %1 ; <i32> [#uses=1]
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%14 = add nsw i32 %5, 0 ; <i32> [#uses=1]
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%15 = add nsw i32 %6, %2 ; <i32> [#uses=1]
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%16 = add nsw i32 %7, %3 ; <i32> [#uses=1]
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%17 = add nsw i32 0, %8 ; <i32> [#uses=1]
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%18 = add nsw i32 %11, %9 ; <i32> [#uses=1]
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%19 = add nsw i32 0, %10 ; <i32> [#uses=1]
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%20 = add nsw i32 %12, 0 ; <i32> [#uses=1]
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%21 = add nsw i32 %17, %13 ; <i32> [#uses=2]
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%22 = add nsw i32 %18, %14 ; <i32> [#uses=2]
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%23 = add nsw i32 %19, %15 ; <i32> [#uses=2]
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%24 = add nsw i32 %20, %16 ; <i32> [#uses=2]
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%25 = add nsw i32 %22, %21 ; <i32> [#uses=2]
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%26 = add nsw i32 %24, %23 ; <i32> [#uses=2]
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%27 = sub i32 %21, %22 ; <i32> [#uses=1]
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%28 = sub i32 %23, %24 ; <i32> [#uses=1]
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%29 = add nsw i32 %26, %25 ; <i32> [#uses=1]
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%30 = sub i32 %25, %26 ; <i32> [#uses=1]
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%31 = sub i32 %27, %28 ; <i32> [#uses=1]
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%32 = ashr i32 %29, 1 ; <i32> [#uses=2]
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%33 = ashr i32 %30, 1 ; <i32> [#uses=2]
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%34 = ashr i32 %31, 1 ; <i32> [#uses=2]
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%35 = icmp sgt i32 %32, 32767 ; <i1> [#uses=1]
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%o0_0.0.i = select i1 %35, i32 32767, i32 %32 ; <i32> [#uses=2]
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%36 = icmp slt i32 %o0_0.0.i, -32768 ; <i1> [#uses=1]
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%37 = icmp sgt i32 %33, 32767 ; <i1> [#uses=1]
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%o1_0.0.i = select i1 %37, i32 32767, i32 %33 ; <i32> [#uses=2]
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%38 = icmp slt i32 %o1_0.0.i, -32768 ; <i1> [#uses=1]
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%39 = icmp sgt i32 %34, 32767 ; <i1> [#uses=1]
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%o2_0.0.i = select i1 %39, i32 32767, i32 %34 ; <i32> [#uses=2]
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%40 = icmp slt i32 %o2_0.0.i, -32768 ; <i1> [#uses=1]
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%tmp101 = lshr i640 %mask133.masked.masked.masked.masked.masked.masked, 256 ; <i640> [#uses=1]
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%41 = trunc i32 %o0_0.0.i to i16 ; <i16> [#uses=1]
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%tmp358 = select i1 %36, i16 -32768, i16 %41 ; <i16> [#uses=2]
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%42 = trunc i32 %o1_0.0.i to i16 ; <i16> [#uses=1]
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%tmp347 = select i1 %38, i16 -32768, i16 %42 ; <i16> [#uses=1]
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%43 = trunc i32 %o2_0.0.i to i16 ; <i16> [#uses=1]
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%tmp335 = select i1 %40, i16 -32768, i16 %43 ; <i16> [#uses=1]
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%44 = icmp sgt i16 %tmp358, -1 ; <i1> [#uses=2]
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%..i24 = select i1 %44, i16 %tmp358, i16 undef ; <i16> [#uses=1]
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%45 = icmp sgt i16 %tmp347, -1 ; <i1> [#uses=1]
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%46 = icmp sgt i16 %tmp335, -1 ; <i1> [#uses=1]
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%47 = zext i16 %..i24 to i32 ; <i32> [#uses=1]
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%tmp = trunc i640 %tmp101 to i32 ; <i32> [#uses=1]
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%48 = and i32 %tmp, 65535 ; <i32> [#uses=2]
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%49 = mul i32 %47, %48 ; <i32> [#uses=1]
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%50 = zext i16 undef to i32 ; <i32> [#uses=1]
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%51 = mul i32 %50, %48 ; <i32> [#uses=1]
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%52 = add i32 %49, %0 ; <i32> [#uses=1]
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%53 = add i32 %51, %0 ; <i32> [#uses=1]
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%54 = lshr i32 %52, undef ; <i32> [#uses=1]
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%55 = lshr i32 %53, undef ; <i32> [#uses=1]
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%56 = trunc i32 %54 to i16 ; <i16> [#uses=1]
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%57 = trunc i32 %55 to i16 ; <i16> [#uses=1]
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%vs16Out0_0.0.i = select i1 %44, i16 %56, i16 undef ; <i16> [#uses=1]
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%vs16Out0_4.0.i = select i1 %45, i16 0, i16 undef ; <i16> [#uses=1]
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%vs16Out1_0.0.i = select i1 %46, i16 %57, i16 undef ; <i16> [#uses=1]
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br i1 undef, label %bb129.i, label %_ZL13JVTLib_105207PKsPK13JVTLib_105184Psj.exit
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bb129.i: ; preds = %bb10
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br label %_ZL13JVTLib_105207PKsPK13JVTLib_105184Psj.exit
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_ZL13JVTLib_105207PKsPK13JVTLib_105184Psj.exit: ; preds = %bb129.i, %bb10
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%58 = phi i16 [ %vs16Out0_4.0.i, %bb129.i ], [ undef, %bb10 ] ; <i16> [#uses=0]
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%59 = phi i16 [ undef, %bb129.i ], [ %vs16Out1_0.0.i, %bb10 ] ; <i16> [#uses=0]
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store i16 %vs16Out0_0.0.i, i16* %ResidualDCZ_Array.0, align 2
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unreachable
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}
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@ -66,6 +66,7 @@ void RegisterInfoEmitter::runHeader(raw_ostream &OS) {
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<< " virtual bool needsStackRealignment(const MachineFunction &) const\n"
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<< " { return false; }\n"
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<< " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
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<< " unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const;\n"
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<< "};\n\n";
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const std::vector<CodeGenRegisterClass> &RegisterClasses =
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@ -831,6 +832,23 @@ void RegisterInfoEmitter::run(raw_ostream &OS) {
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OS << " };\n";
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OS << " return 0;\n";
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OS << "}\n\n";
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OS << "unsigned " << ClassName
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<< "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n"
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<< " switch (RegNo) {\n"
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<< " default:\n return 0;\n";
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for (std::map<Record*, std::vector<std::pair<int, Record*> > >::iterator
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I = SubRegVectors.begin(), E = SubRegVectors.end(); I != E; ++I) {
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OS << " case " << getQualifiedName(I->first) << ":\n";
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for (unsigned i = 0, e = I->second.size(); i != e; ++i)
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OS << " if (SubRegNo == "
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<< getQualifiedName((I->second)[i].second)
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<< ") return " << (I->second)[i].first << ";\n";
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OS << " return 0;\n";
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}
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OS << " };\n";
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OS << " return 0;\n";
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OS << "}\n\n";
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// Emit the constructor of the class...
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OS << ClassName << "::" << ClassName
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