AMDGPU/GlobalISel: Fixed handling of non-standard vectors

[rampitec]

Summary

We do not have register classes for all possible vector
sizes, so round it up for extract vector element.

Also fixes selection of G_MERGE_VALUES when vectors are
not a power of two.

This has required to refactor getRegSplitParts() in way
that it can handle not just power of two vectors.

Ideally we would like RegSplitParts to be generated by
tablegen.

[arsenm]

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

555 ↗

(On Diff #265798)

The selector shouldn't be trying to fix these up. The selector should only see directly selectable vector sizes. We can either widen the vector sources in the legalizer, or add the missing register classes. It's also not valid to use G_MERGE_VALUES on vectors. You have to use G_BUILD_VECTOR or G_CONCAT_VECTORS depending on whether the source is scalar or vector

[rampitec]

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

555 ↗

(On Diff #265798)

In fact it does not seem to be needed at all. REG_SEQUENCE does it right even if incomplete.

[rampitec]

Removed handling of undef elements.

[rampitec]

llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

1342

NB: Nothing breaks even if I remove Exact argument and always use if statements.

[rampitec]

Simplified the patch:

• Removed Exact argument.
• Changed vector<vector<int_16_t>> into vector<int_16_t>[16].

[arsenm]

llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

60

Should probably put this into its own function with a FIXME that it should be a table produced by tablegen, also with a call_once?

llvm/lib/Target/AMDGPU/SIRegisterInfo.h

40

std::array?

[rampitec]

llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

60

I am not really sure we initialize TRI exactly once, especially in a JIT, where llvm can be initialized and finalized multiple times.

[arsenm]

llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

60

It's initialized once per subtarget, but you can make it static. This is the un-tablegened hack from AMDGPURegisterBankInfo:

// HACK: Until this is fully tablegen'd.
static llvm::once_flag InitializeRegisterBankFlag;

static auto InitializeRegisterBankOnce = [this]() {
  assert(&getRegBank(AMDGPU::SGPRRegBankID) == &AMDGPU::SGPRRegBank &&
         &getRegBank(AMDGPU::VGPRRegBankID) == &AMDGPU::VGPRRegBank &&
         &getRegBank(AMDGPU::AGPRRegBankID) == &AMDGPU::AGPRRegBank);
  (void)this;
};

llvm::call_once(InitializeRegisterBankFlag, InitializeRegisterBankOnce);

}

[rampitec]

Moved RegSplitParts into a static std::array initialized once.

[arsenm]

llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

47–50

Should be a static member of TRI. I think here you'll get a global constructor for the std::array

[rampitec]

Moved RegSplitParts into the TRI as a static member.

llvm/lib/Target/AMDGPU/SIRegisterInfo.h

 
 class SIRegisterInfo final : public AMDGPUGenRegisterInfo {
 private:
   const GCNSubtarget &ST;
   bool SpillSGPRToVGPR;
   bool isWave32;
   BitVector RegPressureIgnoredUnits;
 
+  /// Sub reg indexes for getRegSplitParts.
+  /// First index represents subreg size from 1 to 16 DWORDs.
+  /// The inner vector is sorted by bit offset.
+  /// Provided a register can be fully split with given subregs,
+  /// all elements of the inner vector combined give a full lane mask.
+  static std::array<std::vector<int16_t>, 16> RegSplitParts;
+
   void reserveRegisterTuples(BitVector &, MCRegister Reg) const;
 
 public:
   SIRegisterInfo(const GCNSubtarget &ST);
 
   /// \returns the sub reg enum value for the given \p Channel
   /// (e.g. getSubRegFromChannel(0) -> AMDGPU::sub0)
   static unsigned getSubRegFromChannel(unsigned Channel, unsigned NumRegs = 1);

llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

 #include "llvm/CodeGen/LiveIntervals.h"
 #include "llvm/CodeGen/MachineDominators.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/RegisterScavenging.h"
 #include "llvm/CodeGen/SlotIndexes.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/LLVMContext.h"
+#include <vector>
 
 using namespace llvm;
 
 #define GET_REGINFO_TARGET_DESC
 #include "AMDGPUGenRegisterInfo.inc"
 
 static cl::opt<bool> EnableSpillSGPRToVGPR(
   "amdgpu-spill-sgpr-to-vgpr",
   cl::desc("Enable spilling VGPRs to SGPRs"),
   cl::ReallyHidden,
   cl::init(true));
 
+std::array<std::vector<int16_t>, 16> SIRegisterInfo::RegSplitParts;
+
 SIRegisterInfo::SIRegisterInfo(const GCNSubtarget &ST)
     : AMDGPUGenRegisterInfo(AMDGPU::PC_REG, ST.getAMDGPUDwarfFlavour()), ST(ST),
       SpillSGPRToVGPR(EnableSpillSGPRToVGPR), isWave32(ST.isWave32()) {
 
   assert(getSubRegIndexLaneMask(AMDGPU::sub0).getAsInteger() == 3 &&
          getSubRegIndexLaneMask(AMDGPU::sub31).getAsInteger() == (3ULL << 62) &&
          (getSubRegIndexLaneMask(AMDGPU::lo16) |
           getSubRegIndexLaneMask(AMDGPU::hi16)).getAsInteger() ==
            getSubRegIndexLaneMask(AMDGPU::sub0).getAsInteger() &&
          "getNumCoveredRegs() will not work with generated subreg masks!");
 
   RegPressureIgnoredUnits.resize(getNumRegUnits());
   RegPressureIgnoredUnits.set(*MCRegUnitIterator(AMDGPU::M0, this));
   for (auto Reg : AMDGPU::VGPR_HI16RegClass)
     RegPressureIgnoredUnits.set(*MCRegUnitIterator(Reg, this));
+
+  // HACK: Until this is fully tablegen'd.
+  static llvm::once_flag InitializeRegSplitPartsFlag;
+
+  static auto InitializeRegSplitPartsOnce = [this]() {
+    for (unsigned Idx = 1, E = getNumSubRegIndices() - 1; Idx < E; ++Idx) {
+      unsigned Size = getSubRegIdxSize(Idx);
+      if (Size & 31)
+        continue;
+      std::vector<int16_t> &Vec = RegSplitParts[Size / 32 - 1];
+      unsigned Pos = getSubRegIdxOffset(Idx);
+      if (Pos % Size)
+        continue;
+      Pos /= Size;
+      if (Vec.empty()) {
+        unsigned MaxNumParts = 1024 / Size; // Maximum register is 1024 bits.
+        Vec.resize(MaxNumParts);
+      }
+      Vec[Pos] = Idx;
+    }
+  };
+
+
+  llvm::call_once(InitializeRegSplitPartsFlag, InitializeRegSplitPartsOnce);
 }
 
 void SIRegisterInfo::reserveRegisterTuples(BitVector &Reserved,
                                            MCRegister Reg) const {
   MCRegAliasIterator R(Reg, this, true);
 
   for (; R.isValid(); ++R)
     Reserved.set(*R);
void SIRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator MI,
   }
 }
 
 StringRef SIRegisterInfo::getRegAsmName(MCRegister Reg) const {
   return AMDGPUInstPrinter::getRegisterName(Reg);
 }
 
 const TargetRegisterClass *
 SIRegisterInfo::getVGPRClassForBitWidth(unsigned BitWidth) {
-  switch (BitWidth) {
-  case 1:
+  if (BitWidth == 1)
     return &AMDGPU::VReg_1RegClass;
-  case 16:
+  if (BitWidth <= 16)
     return &AMDGPU::VGPR_LO16RegClass;
-  case 32:
+  if (BitWidth <= 32)
     return &AMDGPU::VGPR_32RegClass;
-  case 64:
+  if (BitWidth <= 64)
     return &AMDGPU::VReg_64RegClass;
-  case 96:
+  if (BitWidth <= 96)
     return &AMDGPU::VReg_96RegClass;
-  case 128:
+  if (BitWidth <= 128)
     return &AMDGPU::VReg_128RegClass;
-  case 160:
+  if (BitWidth <= 160)
     return &AMDGPU::VReg_160RegClass;
-  case 192:
+  if (BitWidth <= 192)
     return &AMDGPU::VReg_192RegClass;
-  case 256:
+  if (BitWidth <= 256)
     return &AMDGPU::VReg_256RegClass;
-  case 512:
+  if (BitWidth <= 512)
     return &AMDGPU::VReg_512RegClass;
-  case 1024:
+  if (BitWidth <= 1024)
     return &AMDGPU::VReg_1024RegClass;
-  default:
-    return nullptr;
-  }
-}
+
 
 const TargetRegisterClass *
 SIRegisterInfo::getAGPRClassForBitWidth(unsigned BitWidth) {
-  switch (BitWidth) {
-  case 16:
+  if (BitWidth <= 16)
     return &AMDGPU::AGPR_LO16RegClass;
-  case 32:
+  if (BitWidth <= 32)
     return &AMDGPU::AGPR_32RegClass;
-  case 64:
+  if (BitWidth <= 64)
     return &AMDGPU::AReg_64RegClass;
-  case 96:
+  if (BitWidth <= 96)
     return &AMDGPU::AReg_96RegClass;
-  case 128:
+  if (BitWidth <= 128)
     return &AMDGPU::AReg_128RegClass;
-  case 160:
+  if (BitWidth <= 160)
     return &AMDGPU::AReg_160RegClass;
-  case 192:
+  if (BitWidth <= 192)
     return &AMDGPU::AReg_192RegClass;
-  case 256:
+  if (BitWidth <= 256)
     return &AMDGPU::AReg_256RegClass;
-  case 512:
+  if (BitWidth <= 512)
     return &AMDGPU::AReg_512RegClass;
-  case 1024:
+  if (BitWidth <= 1024)
     return &AMDGPU::AReg_1024RegClass;
-  default:
-    return nullptr;
-  }
-}
+
 
 const TargetRegisterClass *
 SIRegisterInfo::getSGPRClassForBitWidth(unsigned BitWidth) {
-  switch (BitWidth) {
-  case 16:
+  if (BitWidth <= 16)
     return &AMDGPU::SGPR_LO16RegClass;
-  case 32:
+  if (BitWidth <= 32)
     return &AMDGPU::SReg_32RegClass;
-  case 64:
+  if (BitWidth <= 64)
     return &AMDGPU::SReg_64RegClass;
-  case 96:
+  if (BitWidth <= 96)
     return &AMDGPU::SGPR_96RegClass;
-  case 128:
+  if (BitWidth <= 128)
     return &AMDGPU::SGPR_128RegClass;
-  case 160:
+  if (BitWidth <= 160)
     return &AMDGPU::SGPR_160RegClass;
-  case 192:
+  if (BitWidth <= 192)
     return &AMDGPU::SGPR_192RegClass;
-  case 256:
+  if (BitWidth <= 256)
     return &AMDGPU::SGPR_256RegClass;
-  case 512:
+  if (BitWidth <= 512)
     return &AMDGPU::SGPR_512RegClass;
-  case 1024:
+  if (BitWidth <= 1024)
     return &AMDGPU::SGPR_1024RegClass;
-  default:
-    return nullptr;
-  }
-}
+
 
 // FIXME: This is very slow. It might be worth creating a map from physreg to
 // register class.
 const TargetRegisterClass *
 SIRegisterInfo::getPhysRegClass(MCRegister Reg) const {
   static const TargetRegisterClass *const BaseClasses[] = {
     &AMDGPU::VGPR_LO16RegClass,
     &AMDGPU::VGPR_HI16RegClass,
MCRegister SIRegisterInfo::findUnusedRegister(const MachineRegisterInfo &MRI,
   return MCRegister();
 }
 
 ArrayRef<int16_t> SIRegisterInfo::getRegSplitParts(const TargetRegisterClass *RC,
                                                    unsigned EltSize) const {
   const unsigned RegBitWidth = AMDGPU::getRegBitWidth(*RC->MC);
   assert(RegBitWidth >= 32 && RegBitWidth <= 1024);
 
-  const unsigned EltBitWidth = EltSize * 8;
-  assert(EltBitWidth >= 32 && EltBitWidth < 1024 && isPowerOf2_32(EltBitWidth));
-  const unsigned LogEltBitWidth = Log2_32(EltBitWidth);
-
-  assert(RegBitWidth % EltBitWidth == 0);
+  const unsigned RegDWORDs = RegBitWidth / 32;
+  const unsigned EltDWORDs = EltSize / 4;
+  assert(RegSplitParts.size() + 1 >= EltDWORDs);
 
-  if (RegBitWidth == EltBitWidth)
-    return {};
-
-  static const int16_t Sub_32[] = {
-    AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3,
-    AMDGPU::sub4, AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7,
-    AMDGPU::sub8, AMDGPU::sub9, AMDGPU::sub10, AMDGPU::sub11,
-    AMDGPU::sub12, AMDGPU::sub13, AMDGPU::sub14, AMDGPU::sub15,
-    AMDGPU::sub16, AMDGPU::sub17, AMDGPU::sub18, AMDGPU::sub19,
-    AMDGPU::sub20, AMDGPU::sub21, AMDGPU::sub22, AMDGPU::sub23,
-    AMDGPU::sub24, AMDGPU::sub25, AMDGPU::sub26, AMDGPU::sub27,
-    AMDGPU::sub28, AMDGPU::sub29, AMDGPU::sub30, AMDGPU::sub31
-  };
-
-  static const int16_t Sub_64[] = {
-    AMDGPU::sub0_sub1, AMDGPU::sub2_sub3,
-    AMDGPU::sub4_sub5, AMDGPU::sub6_sub7,
-    AMDGPU::sub8_sub9, AMDGPU::sub10_sub11,
-    AMDGPU::sub12_sub13, AMDGPU::sub14_sub15,
-    AMDGPU::sub16_sub17, AMDGPU::sub18_sub19,
-    AMDGPU::sub20_sub21, AMDGPU::sub22_sub23,
-    AMDGPU::sub24_sub25, AMDGPU::sub26_sub27,
-    AMDGPU::sub28_sub29, AMDGPU::sub30_sub31
-  };
-
-  static const int16_t Sub_128[] = {
-    AMDGPU::sub0_sub1_sub2_sub3,
-    AMDGPU::sub4_sub5_sub6_sub7,
-    AMDGPU::sub8_sub9_sub10_sub11,
-    AMDGPU::sub12_sub13_sub14_sub15,
-    AMDGPU::sub16_sub17_sub18_sub19,
-    AMDGPU::sub20_sub21_sub22_sub23,
-    AMDGPU::sub24_sub25_sub26_sub27,
-    AMDGPU::sub28_sub29_sub30_sub31
-  };
-
-  static const int16_t Sub_256[] = {
-    AMDGPU::sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7,
-    AMDGPU::sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15,
-    AMDGPU::sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23,
-    AMDGPU::sub24_sub25_sub26_sub27_sub28_sub29_sub30_sub31
-  };
-
-  static const int16_t Sub_512[] = {
-    AMDGPU::sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15,
-    AMDGPU::sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27_sub28_sub29_sub30_sub31
-  };
-
-  static const int16_t *const Subs[] = {
-    Sub_32, Sub_64, Sub_128, Sub_256, Sub_512
-  };
+  const std::vector<int16_t> &Parts = RegSplitParts[EltDWORDs - 1];
+  const unsigned NumParts = RegDWORDs / EltDWORDs;
 
-  return makeArrayRef(Subs[LogEltBitWidth - 5], RegBitWidth >> LogEltBitWidth);
+  return makeArrayRef(Parts.data(), NumParts);
 }
 
 const TargetRegisterClass*
 SIRegisterInfo::getRegClassForReg(const MachineRegisterInfo &MRI,
                                   Register Reg) const {
   return Reg.isVirtual() ? MRI.getRegClass(Reg) : getPhysRegClass(Reg);
 }
 

llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement.ll

 ; MOVREL-NEXT:    s_mov_b32 s40, s66
 ; MOVREL-NEXT:    s_mov_b64 s[38:39], 2.0
 ; MOVREL-NEXT:    s_movrels_b64 s[0:1], s[36:37]
 ; MOVREL-NEXT:    ; return to shader part epilog
 entry:
   %ext = extractelement <16 x double> <double 1.0, double 2.0, double 3.0, double 4.0, double 5.0, double 6.0, double 7.0, double 8.0, double 9.0, double 10.0, double 11.0, double 12.0, double 13.0, double 14.0, double 15.0, double 16.0>, i32 %sel
   ret double %ext
 }
+
+define amdgpu_ps float @dyn_extract_v6f32_s_v(<6 x float> inreg %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f32_s_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s0, s2
+; GPRIDX-NEXT:    s_mov_b32 s1, s3
+; GPRIDX-NEXT:    s_mov_b32 s2, s4
+; GPRIDX-NEXT:    s_mov_b32 s3, s5
+; GPRIDX-NEXT:    s_mov_b32 s4, s6
+; GPRIDX-NEXT:    s_mov_b32 s5, s7
+; GPRIDX-NEXT:    s_mov_b64 s[6:7], exec
+; GPRIDX-NEXT:  BB33_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s8, v0
+; GPRIDX-NEXT:    s_mov_b32 m0, s8
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s8, v0
+; GPRIDX-NEXT:    s_movrels_b32 s8, s0
+; GPRIDX-NEXT:    v_mov_b32_e32 v1, s8
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB33_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[6:7]
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v1
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v6f32_s_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s0, s2
+; MOVREL-NEXT:    s_mov_b32 s1, s3
+; MOVREL-NEXT:    s_mov_b32 s2, s4
+; MOVREL-NEXT:    s_mov_b32 s3, s5
+; MOVREL-NEXT:    s_mov_b32 s4, s6
+; MOVREL-NEXT:    s_mov_b32 s5, s7
+; MOVREL-NEXT:    s_mov_b64 s[6:7], exec
+; MOVREL-NEXT:  BB33_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s8, v0
+; MOVREL-NEXT:    s_mov_b32 m0, s8
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s8, v0
+; MOVREL-NEXT:    s_movrels_b32 s8, s0
+; MOVREL-NEXT:    v_mov_b32_e32 v1, s8
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB33_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[6:7]
+; MOVREL-NEXT:    v_mov_b32_e32 v0, v1
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <6 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define float @dyn_extract_v6f32_v_v(<6 x float> %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f32_v_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GPRIDX-NEXT:    s_mov_b64 s[4:5], exec
+; GPRIDX-NEXT:  BB34_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s6, v6
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v6
+; GPRIDX-NEXT:    s_set_gpr_idx_on s6, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v7, v0
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB34_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[4:5]
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v7
+; GPRIDX-NEXT:    s_setpc_b64 s[30:31]
+;
+; MOVREL-LABEL: dyn_extract_v6f32_v_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; MOVREL-NEXT:    s_mov_b64 s[4:5], exec
+; MOVREL-NEXT:  BB34_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s6, v6
+; MOVREL-NEXT:    s_mov_b32 m0, s6
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v6
+; MOVREL-NEXT:    v_movrels_b32_e32 v7, v0
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB34_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[4:5]
+; MOVREL-NEXT:    v_mov_b32_e32 v0, v7
+; MOVREL-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %ext = extractelement <6 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define amdgpu_ps float @dyn_extract_v6f32_v_s(<6 x float> %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f32_v_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_set_gpr_idx_on s2, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v0
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v6f32_v_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 m0, s2
+; MOVREL-NEXT:    v_movrels_b32_e32 v0, v0
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <6 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define amdgpu_ps float @dyn_extract_v6f32_s_s(<6 x float> inreg %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f32_s_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s0, s2
+; GPRIDX-NEXT:    s_mov_b32 m0, s8
+; GPRIDX-NEXT:    s_mov_b32 s1, s3
+; GPRIDX-NEXT:    s_mov_b32 s2, s4
+; GPRIDX-NEXT:    s_mov_b32 s3, s5
+; GPRIDX-NEXT:    s_mov_b32 s4, s6
+; GPRIDX-NEXT:    s_mov_b32 s5, s7
+; GPRIDX-NEXT:    s_movrels_b32 s0, s0
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, s0
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v6f32_s_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s0, s2
+; MOVREL-NEXT:    s_mov_b32 m0, s8
+; MOVREL-NEXT:    s_mov_b32 s1, s3
+; MOVREL-NEXT:    s_mov_b32 s2, s4
+; MOVREL-NEXT:    s_mov_b32 s3, s5
+; MOVREL-NEXT:    s_mov_b32 s4, s6
+; MOVREL-NEXT:    s_mov_b32 s5, s7
+; MOVREL-NEXT:    s_movrels_b32 s0, s0
+; MOVREL-NEXT:    v_mov_b32_e32 v0, s0
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <6 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define amdgpu_ps float @dyn_extract_v7f32_s_v(<7 x float> inreg %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f32_s_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s0, s2
+; GPRIDX-NEXT:    s_mov_b32 s1, s3
+; GPRIDX-NEXT:    s_mov_b32 s2, s4
+; GPRIDX-NEXT:    s_mov_b32 s3, s5
+; GPRIDX-NEXT:    s_mov_b32 s4, s6
+; GPRIDX-NEXT:    s_mov_b32 s6, s8
+; GPRIDX-NEXT:    s_mov_b32 s5, s7
+; GPRIDX-NEXT:    s_mov_b64 s[8:9], exec
+; GPRIDX-NEXT:  BB37_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s7, v0
+; GPRIDX-NEXT:    s_mov_b32 m0, s7
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s7, v0
+; GPRIDX-NEXT:    s_movrels_b32 s7, s0
+; GPRIDX-NEXT:    v_mov_b32_e32 v1, s7
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB37_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[8:9]
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v1
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v7f32_s_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s0, s2
+; MOVREL-NEXT:    s_mov_b32 s1, s3
+; MOVREL-NEXT:    s_mov_b32 s2, s4
+; MOVREL-NEXT:    s_mov_b32 s3, s5
+; MOVREL-NEXT:    s_mov_b32 s4, s6
+; MOVREL-NEXT:    s_mov_b32 s6, s8
+; MOVREL-NEXT:    s_mov_b32 s5, s7
+; MOVREL-NEXT:    s_mov_b64 s[8:9], exec
+; MOVREL-NEXT:  BB37_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s7, v0
+; MOVREL-NEXT:    s_mov_b32 m0, s7
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s7, v0
+; MOVREL-NEXT:    s_movrels_b32 s7, s0
+; MOVREL-NEXT:    v_mov_b32_e32 v1, s7
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB37_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[8:9]
+; MOVREL-NEXT:    v_mov_b32_e32 v0, v1
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <7 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define float @dyn_extract_v7f32_v_v(<7 x float> %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f32_v_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GPRIDX-NEXT:    s_mov_b64 s[4:5], exec
+; GPRIDX-NEXT:  BB38_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s6, v7
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v7
+; GPRIDX-NEXT:    s_set_gpr_idx_on s6, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v8, v0
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB38_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[4:5]
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v8
+; GPRIDX-NEXT:    s_setpc_b64 s[30:31]
+;
+; MOVREL-LABEL: dyn_extract_v7f32_v_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; MOVREL-NEXT:    s_mov_b64 s[4:5], exec
+; MOVREL-NEXT:  BB38_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s6, v7
+; MOVREL-NEXT:    s_mov_b32 m0, s6
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v7
+; MOVREL-NEXT:    v_movrels_b32_e32 v8, v0
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB38_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[4:5]
+; MOVREL-NEXT:    v_mov_b32_e32 v0, v8
+; MOVREL-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %ext = extractelement <7 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define amdgpu_ps float @dyn_extract_v7f32_v_s(<7 x float> %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f32_v_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_set_gpr_idx_on s2, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v0
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v7f32_v_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 m0, s2
+; MOVREL-NEXT:    v_movrels_b32_e32 v0, v0
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <7 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define amdgpu_ps float @dyn_extract_v7f32_s_s(<7 x float> inreg %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f32_s_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s0, s2
+; GPRIDX-NEXT:    s_mov_b32 m0, s9
+; GPRIDX-NEXT:    s_mov_b32 s1, s3
+; GPRIDX-NEXT:    s_mov_b32 s2, s4
+; GPRIDX-NEXT:    s_mov_b32 s3, s5
+; GPRIDX-NEXT:    s_mov_b32 s4, s6
+; GPRIDX-NEXT:    s_mov_b32 s5, s7
+; GPRIDX-NEXT:    s_mov_b32 s6, s8
+; GPRIDX-NEXT:    s_movrels_b32 s0, s0
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, s0
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v7f32_s_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s0, s2
+; MOVREL-NEXT:    s_mov_b32 m0, s9
+; MOVREL-NEXT:    s_mov_b32 s1, s3
+; MOVREL-NEXT:    s_mov_b32 s2, s4
+; MOVREL-NEXT:    s_mov_b32 s3, s5
+; MOVREL-NEXT:    s_mov_b32 s4, s6
+; MOVREL-NEXT:    s_mov_b32 s5, s7
+; MOVREL-NEXT:    s_mov_b32 s6, s8
+; MOVREL-NEXT:    s_movrels_b32 s0, s0
+; MOVREL-NEXT:    v_mov_b32_e32 v0, s0
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <7 x float> %vec, i32 %sel
+  ret float %ext
+}
+
+define amdgpu_ps double @dyn_extract_v6f64_s_v(<6 x double> inreg %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f64_s_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s16, s2
+; GPRIDX-NEXT:    s_mov_b32 s17, s3
+; GPRIDX-NEXT:    s_mov_b32 s18, s4
+; GPRIDX-NEXT:    s_mov_b32 s19, s5
+; GPRIDX-NEXT:    s_mov_b32 s20, s6
+; GPRIDX-NEXT:    s_mov_b32 s21, s7
+; GPRIDX-NEXT:    s_mov_b32 s22, s8
+; GPRIDX-NEXT:    s_mov_b32 s23, s9
+; GPRIDX-NEXT:    s_mov_b32 s24, s10
+; GPRIDX-NEXT:    s_mov_b32 s25, s11
+; GPRIDX-NEXT:    s_mov_b32 s26, s12
+; GPRIDX-NEXT:    s_mov_b32 s27, s13
+; GPRIDX-NEXT:    s_mov_b64 s[2:3], exec
+; GPRIDX-NEXT:  BB41_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s0, v0
+; GPRIDX-NEXT:    s_lshl_b32 m0, s0, 1
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s0, v0
+; GPRIDX-NEXT:    s_movrels_b32 s0, s16
+; GPRIDX-NEXT:    s_movrels_b32 s1, s17
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB41_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[2:3]
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v6f64_s_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s16, s2
+; MOVREL-NEXT:    s_mov_b32 s17, s3
+; MOVREL-NEXT:    s_mov_b32 s18, s4
+; MOVREL-NEXT:    s_mov_b32 s19, s5
+; MOVREL-NEXT:    s_mov_b32 s20, s6
+; MOVREL-NEXT:    s_mov_b32 s21, s7
+; MOVREL-NEXT:    s_mov_b32 s22, s8
+; MOVREL-NEXT:    s_mov_b32 s23, s9
+; MOVREL-NEXT:    s_mov_b32 s24, s10
+; MOVREL-NEXT:    s_mov_b32 s25, s11
+; MOVREL-NEXT:    s_mov_b32 s26, s12
+; MOVREL-NEXT:    s_mov_b32 s27, s13
+; MOVREL-NEXT:    s_mov_b64 s[2:3], exec
+; MOVREL-NEXT:  BB41_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s0, v0
+; MOVREL-NEXT:    s_lshl_b32 m0, s0, 1
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s0, v0
+; MOVREL-NEXT:    s_movrels_b32 s0, s16
+; MOVREL-NEXT:    s_movrels_b32 s1, s17
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB41_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[2:3]
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <6 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define double @dyn_extract_v6f64_v_v(<6 x double> %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f64_v_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GPRIDX-NEXT:    s_mov_b64 s[4:5], exec
+; GPRIDX-NEXT:  BB42_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s6, v12
+; GPRIDX-NEXT:    s_lshl_b32 s7, s6, 1
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v12
+; GPRIDX-NEXT:    s_set_gpr_idx_on s7, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v13, v0
+; GPRIDX-NEXT:    v_mov_b32_e32 v14, v1
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB42_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[4:5]
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v13
+; GPRIDX-NEXT:    v_mov_b32_e32 v1, v14
+; GPRIDX-NEXT:    s_setpc_b64 s[30:31]
+;
+; MOVREL-LABEL: dyn_extract_v6f64_v_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; MOVREL-NEXT:    s_mov_b64 s[4:5], exec
+; MOVREL-NEXT:  BB42_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s6, v12
+; MOVREL-NEXT:    s_lshl_b32 m0, s6, 1
+; MOVREL-NEXT:    v_movrels_b32_e32 v13, v0
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v12
+; MOVREL-NEXT:    v_movrels_b32_e32 v14, v1
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB42_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[4:5]
+; MOVREL-NEXT:    v_mov_b32_e32 v0, v13
+; MOVREL-NEXT:    v_mov_b32_e32 v1, v14
+; MOVREL-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %ext = extractelement <6 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define amdgpu_ps double @dyn_extract_v6f64_v_s(<6 x double> %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f64_v_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_lshl_b32 s0, s2, 1
+; GPRIDX-NEXT:    s_set_gpr_idx_on s0, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v12, v0
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v1
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    v_readfirstlane_b32 s0, v12
+; GPRIDX-NEXT:    v_readfirstlane_b32 s1, v0
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v6f64_v_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_lshl_b32 m0, s2, 1
+; MOVREL-NEXT:    v_movrels_b32_e32 v12, v0
+; MOVREL-NEXT:    v_movrels_b32_e32 v0, v1
+; MOVREL-NEXT:    v_readfirstlane_b32 s0, v12
+; MOVREL-NEXT:    v_readfirstlane_b32 s1, v0
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <6 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define amdgpu_ps double @dyn_extract_v6f64_s_s(<6 x double> inreg %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v6f64_s_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s0, s2
+; GPRIDX-NEXT:    s_mov_b32 s1, s3
+; GPRIDX-NEXT:    s_mov_b32 m0, s14
+; GPRIDX-NEXT:    s_mov_b32 s2, s4
+; GPRIDX-NEXT:    s_mov_b32 s3, s5
+; GPRIDX-NEXT:    s_mov_b32 s4, s6
+; GPRIDX-NEXT:    s_mov_b32 s5, s7
+; GPRIDX-NEXT:    s_mov_b32 s6, s8
+; GPRIDX-NEXT:    s_mov_b32 s7, s9
+; GPRIDX-NEXT:    s_mov_b32 s8, s10
+; GPRIDX-NEXT:    s_mov_b32 s9, s11
+; GPRIDX-NEXT:    s_mov_b32 s10, s12
+; GPRIDX-NEXT:    s_mov_b32 s11, s13
+; GPRIDX-NEXT:    s_movrels_b64 s[0:1], s[0:1]
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v6f64_s_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s0, s2
+; MOVREL-NEXT:    s_mov_b32 s1, s3
+; MOVREL-NEXT:    s_mov_b32 m0, s14
+; MOVREL-NEXT:    s_mov_b32 s2, s4
+; MOVREL-NEXT:    s_mov_b32 s3, s5
+; MOVREL-NEXT:    s_mov_b32 s4, s6
+; MOVREL-NEXT:    s_mov_b32 s5, s7
+; MOVREL-NEXT:    s_mov_b32 s6, s8
+; MOVREL-NEXT:    s_mov_b32 s7, s9
+; MOVREL-NEXT:    s_mov_b32 s8, s10
+; MOVREL-NEXT:    s_mov_b32 s9, s11
+; MOVREL-NEXT:    s_mov_b32 s10, s12
+; MOVREL-NEXT:    s_mov_b32 s11, s13
+; MOVREL-NEXT:    s_movrels_b64 s[0:1], s[0:1]
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <6 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define amdgpu_ps double @dyn_extract_v7f64_s_v(<7 x double> inreg %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f64_s_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s16, s2
+; GPRIDX-NEXT:    s_mov_b32 s17, s3
+; GPRIDX-NEXT:    s_mov_b32 s18, s4
+; GPRIDX-NEXT:    s_mov_b32 s19, s5
+; GPRIDX-NEXT:    s_mov_b32 s20, s6
+; GPRIDX-NEXT:    s_mov_b32 s21, s7
+; GPRIDX-NEXT:    s_mov_b32 s22, s8
+; GPRIDX-NEXT:    s_mov_b32 s23, s9
+; GPRIDX-NEXT:    s_mov_b32 s24, s10
+; GPRIDX-NEXT:    s_mov_b32 s25, s11
+; GPRIDX-NEXT:    s_mov_b32 s26, s12
+; GPRIDX-NEXT:    s_mov_b32 s27, s13
+; GPRIDX-NEXT:    s_mov_b32 s28, s14
+; GPRIDX-NEXT:    s_mov_b32 s29, s15
+; GPRIDX-NEXT:    s_mov_b64 s[2:3], exec
+; GPRIDX-NEXT:  BB45_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s0, v0
+; GPRIDX-NEXT:    s_lshl_b32 m0, s0, 1
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s0, v0
+; GPRIDX-NEXT:    s_movrels_b32 s0, s16
+; GPRIDX-NEXT:    s_movrels_b32 s1, s17
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB45_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[2:3]
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v7f64_s_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s16, s2
+; MOVREL-NEXT:    s_mov_b32 s17, s3
+; MOVREL-NEXT:    s_mov_b32 s18, s4
+; MOVREL-NEXT:    s_mov_b32 s19, s5
+; MOVREL-NEXT:    s_mov_b32 s20, s6
+; MOVREL-NEXT:    s_mov_b32 s21, s7
+; MOVREL-NEXT:    s_mov_b32 s22, s8
+; MOVREL-NEXT:    s_mov_b32 s23, s9
+; MOVREL-NEXT:    s_mov_b32 s24, s10
+; MOVREL-NEXT:    s_mov_b32 s25, s11
+; MOVREL-NEXT:    s_mov_b32 s26, s12
+; MOVREL-NEXT:    s_mov_b32 s27, s13
+; MOVREL-NEXT:    s_mov_b32 s28, s14
+; MOVREL-NEXT:    s_mov_b32 s29, s15
+; MOVREL-NEXT:    s_mov_b64 s[2:3], exec
+; MOVREL-NEXT:  BB45_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s0, v0
+; MOVREL-NEXT:    s_lshl_b32 m0, s0, 1
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s0, v0
+; MOVREL-NEXT:    s_movrels_b32 s0, s16
+; MOVREL-NEXT:    s_movrels_b32 s1, s17
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB45_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[2:3]
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <7 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define double @dyn_extract_v7f64_v_v(<7 x double> %vec, i32 %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f64_v_v:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GPRIDX-NEXT:    s_mov_b64 s[4:5], exec
+; GPRIDX-NEXT:  BB46_1: ; =>This Inner Loop Header: Depth=1
+; GPRIDX-NEXT:    v_readfirstlane_b32 s6, v14
+; GPRIDX-NEXT:    s_lshl_b32 s7, s6, 1
+; GPRIDX-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v14
+; GPRIDX-NEXT:    s_set_gpr_idx_on s7, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v15, v0
+; GPRIDX-NEXT:    v_mov_b32_e32 v16, v1
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    s_and_saveexec_b64 vcc, vcc
+; GPRIDX-NEXT:    s_xor_b64 exec, exec, vcc
+; GPRIDX-NEXT:    s_cbranch_execnz BB46_1
+; GPRIDX-NEXT:  ; %bb.2:
+; GPRIDX-NEXT:    s_mov_b64 exec, s[4:5]
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v15
+; GPRIDX-NEXT:    v_mov_b32_e32 v1, v16
+; GPRIDX-NEXT:    s_setpc_b64 s[30:31]
+;
+; MOVREL-LABEL: dyn_extract_v7f64_v_v:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; MOVREL-NEXT:    s_mov_b64 s[4:5], exec
+; MOVREL-NEXT:  BB46_1: ; =>This Inner Loop Header: Depth=1
+; MOVREL-NEXT:    v_readfirstlane_b32 s6, v14
+; MOVREL-NEXT:    s_lshl_b32 m0, s6, 1
+; MOVREL-NEXT:    v_movrels_b32_e32 v15, v0
+; MOVREL-NEXT:    v_cmp_eq_u32_e32 vcc, s6, v14
+; MOVREL-NEXT:    v_movrels_b32_e32 v16, v1
+; MOVREL-NEXT:    s_and_saveexec_b64 vcc, vcc
+; MOVREL-NEXT:    s_xor_b64 exec, exec, vcc
+; MOVREL-NEXT:    s_cbranch_execnz BB46_1
+; MOVREL-NEXT:  ; %bb.2:
+; MOVREL-NEXT:    s_mov_b64 exec, s[4:5]
+; MOVREL-NEXT:    v_mov_b32_e32 v0, v15
+; MOVREL-NEXT:    v_mov_b32_e32 v1, v16
+; MOVREL-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %ext = extractelement <7 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define amdgpu_ps double @dyn_extract_v7f64_v_s(<7 x double> %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f64_v_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_lshl_b32 s0, s2, 1
+; GPRIDX-NEXT:    s_set_gpr_idx_on s0, gpr_idx(SRC0)
+; GPRIDX-NEXT:    v_mov_b32_e32 v14, v0
+; GPRIDX-NEXT:    v_mov_b32_e32 v0, v1
+; GPRIDX-NEXT:    s_set_gpr_idx_off
+; GPRIDX-NEXT:    v_readfirstlane_b32 s0, v14
+; GPRIDX-NEXT:    v_readfirstlane_b32 s1, v0
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v7f64_v_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_lshl_b32 m0, s2, 1
+; MOVREL-NEXT:    v_movrels_b32_e32 v14, v0
+; MOVREL-NEXT:    v_movrels_b32_e32 v0, v1
+; MOVREL-NEXT:    v_readfirstlane_b32 s0, v14
+; MOVREL-NEXT:    v_readfirstlane_b32 s1, v0
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <7 x double> %vec, i32 %sel
+  ret double %ext
+}
+
+define amdgpu_ps double @dyn_extract_v7f64_s_s(<7 x double> inreg %vec, i32 inreg %sel) {
+; GPRIDX-LABEL: dyn_extract_v7f64_s_s:
+; GPRIDX:       ; %bb.0: ; %entry
+; GPRIDX-NEXT:    s_mov_b32 s0, s2
+; GPRIDX-NEXT:    s_mov_b32 s1, s3
+; GPRIDX-NEXT:    s_mov_b32 m0, s16
+; GPRIDX-NEXT:    s_mov_b32 s2, s4
+; GPRIDX-NEXT:    s_mov_b32 s3, s5
+; GPRIDX-NEXT:    s_mov_b32 s4, s6
+; GPRIDX-NEXT:    s_mov_b32 s5, s7
+; GPRIDX-NEXT:    s_mov_b32 s6, s8
+; GPRIDX-NEXT:    s_mov_b32 s7, s9
+; GPRIDX-NEXT:    s_mov_b32 s8, s10
+; GPRIDX-NEXT:    s_mov_b32 s9, s11
+; GPRIDX-NEXT:    s_mov_b32 s10, s12
+; GPRIDX-NEXT:    s_mov_b32 s11, s13
+; GPRIDX-NEXT:    s_mov_b32 s12, s14
+; GPRIDX-NEXT:    s_mov_b32 s13, s15
+; GPRIDX-NEXT:    s_movrels_b64 s[0:1], s[0:1]
+; GPRIDX-NEXT:    ; return to shader part epilog
+;
+; MOVREL-LABEL: dyn_extract_v7f64_s_s:
+; MOVREL:       ; %bb.0: ; %entry
+; MOVREL-NEXT:    s_mov_b32 s0, s2
+; MOVREL-NEXT:    s_mov_b32 s1, s3
+; MOVREL-NEXT:    s_mov_b32 m0, s16
+; MOVREL-NEXT:    s_mov_b32 s2, s4
+; MOVREL-NEXT:    s_mov_b32 s3, s5
+; MOVREL-NEXT:    s_mov_b32 s4, s6
+; MOVREL-NEXT:    s_mov_b32 s5, s7
+; MOVREL-NEXT:    s_mov_b32 s6, s8
+; MOVREL-NEXT:    s_mov_b32 s7, s9
+; MOVREL-NEXT:    s_mov_b32 s8, s10
+; MOVREL-NEXT:    s_mov_b32 s9, s11
+; MOVREL-NEXT:    s_mov_b32 s10, s12
+; MOVREL-NEXT:    s_mov_b32 s11, s13
+; MOVREL-NEXT:    s_mov_b32 s12, s14
+; MOVREL-NEXT:    s_mov_b32 s13, s15
+; MOVREL-NEXT:    s_movrels_b64 s[0:1], s[0:1]
+; MOVREL-NEXT:    ; return to shader part epilog
+entry:
+  %ext = extractelement <7 x double> %vec, i32 %sel
+  ret double %ext
+}

llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-concat-vectors.mir

 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=instruction-select -global-isel-abort=2 -pass-remarks-missed='gisel*'  -o - %s 2> %t | FileCheck -check-prefix=GCN  %s
-# RUN: FileCheck -check-prefix=ERR %s < %t
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=instruction-select -global-isel-abort=2 -pass-remarks-missed='gisel*'  -o - %s | FileCheck -check-prefix=GCN  %s
 
-# ERR-NOT: remark:
-# ERR: remark: <unknown>:0:0: cannot select: %2:sgpr(<6 x s64>) = G_CONCAT_VECTORS %0:sgpr(<3 x s64>), %1:sgpr(<3 x s64>) (in function: test_concat_vectors_s_v6s64_s_v3s64_s_v3s64)
-# ERR-NOT: remark:
 
 ---
 name: test_concat_vectors_v_v4s16_v_v2s16_v_v2s16
 legalized:       true
 regBankSelected: true
 
 body: |
   bb.0:

 legalized:       true
 regBankSelected: true
 
 body: |
   bb.0:
     liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
 
     ; GCN-LABEL: name: test_concat_vectors_s_v6s64_s_v3s64_s_v3s64
-    ; GCN: [[DEF:%[0-9]+]]:sgpr(<3 x s64>) = G_IMPLICIT_DEF
-    ; GCN: [[DEF1:%[0-9]+]]:sgpr(<3 x s64>) = G_IMPLICIT_DEF
-    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:sgpr(<6 x s64>) = G_CONCAT_VECTORS [[DEF]](<3 x s64>), [[DEF1]](<3 x s64>)
-    ; GCN: S_ENDPGM 0, implicit [[CONCAT_VECTORS]](<6 x s64>)
+    ; GCN: [[DEF:%[0-9]+]]:sgpr_192 = IMPLICIT_DEF
+    ; GCN: [[DEF1:%[0-9]+]]:sgpr_192 = IMPLICIT_DEF
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sgpr_512 = REG_SEQUENCE [[DEF]], %subreg.sub0_sub1_sub2_sub3_sub4_sub5, [[DEF1]], %subreg.sub6_sub7_sub8_sub9_sub10_sub11
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
     %0:sgpr(<3 x s64>) = G_IMPLICIT_DEF
     %1:sgpr(<3 x s64>) = G_IMPLICIT_DEF
     %2:sgpr(<6 x s64>) = G_CONCAT_VECTORS %0, %1
     S_ENDPGM 0, implicit %2
 ...
 
 ---
 name: test_concat_vectors_s_v8s64_s_v4s64_s_v4s64