[llvm] [DAGCombiner] Fold insert_vector_elt into a shared BUILD_VECTOR with undef lanes (PR #210905)
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llvm-commits at lists.llvm.org
Tue Jul 21 01:12:04 PDT 2026
llvmorg-github-actions[bot] wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-amdgpu
Author: Yuyang Zhang (yuyzhang512)
<details>
<summary>Changes</summary>
The `insert_vector_elt -> build_vector` fold in `DAGCombiner` requires the source `BUILD_VECTOR` to have one use, to avoid duplicating it. When the base has undef lanes, rebuilding only re-references its existing scalar operands, so it cannot duplicate real work, and it un-shares a CSE-shared poison-padded base produced by `insertelement` on a poison vector.
This allows the fold for a multi-use base in that case, gated by a new `TargetLowering` hook (`shouldUnshareBuildVectorForInsertElt`, default off) so only targets where `BUILD_VECTOR` is cheap opt in. AMDGPU opts in (its `BUILD_VECTOR` lowers to `REG_SEQUENCE` glue), which removes copies of a shared base's undef/overwritten lanes.
Split out from #<!-- -->199631 per review. Non-AMDGPU targets are unchanged (hook defaults off). AMDGPU: 2 tests regenerated (verifier-clean).
Note: the `splitkit-getsubrangeformask.ll` undef-deprecator flag is a false positive — those are MIR subregister-def flags (undef %reg.sub), not IR undef values.
---
Patch is 42.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/210905.diff
7 Files Affected:
- (modified) llvm/include/llvm/CodeGen/TargetLowering.h (+8)
- (modified) llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (+8-1)
- (modified) llvm/lib/Target/AMDGPU/SIISelLowering.cpp (+7)
- (modified) llvm/lib/Target/AMDGPU/SIISelLowering.h (+2)
- (added) llvm/test/CodeGen/AMDGPU/insert-vector-elt-build-vector-poison.ll (+25)
- (modified) llvm/test/CodeGen/AMDGPU/splitkit-getsubrangeformask.ll (+69-73)
- (modified) llvm/test/CodeGen/AMDGPU/undefined-subreg-liverange.ll (+3-8)
``````````diff
diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h b/llvm/include/llvm/CodeGen/TargetLowering.h
index 9a6dd7735421e..c1645cfbe2f55 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -999,6 +999,14 @@ class LLVM_ABI TargetLoweringBase {
return false;
}
+ /// Return true if folding INSERT_VECTOR_ELT into a fresh BUILD_VECTOR is
+ /// profitable even when the source BUILD_VECTOR has multiple uses (which
+ /// un-shares it). This helps targets where BUILD_VECTOR is cheap glue (e.g.
+ /// lowered to REG_SEQUENCE) by avoiding copies of a shared poison-padded
+ /// base; targets where a vector copy is cheaper should keep the default and
+ /// retain the sharing.
+ virtual bool shouldUnshareBuildVectorForInsertElt(EVT) const { return false; }
+
/// Return true if target always benefits from combining into FMA for a
/// given value type. This must typically return false on targets where FMA
/// takes more cycles to execute than FADD.
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 32e6d65159b5e..bf8b23fcbbafc 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -25179,7 +25179,14 @@ SDValue DAGCombiner::visitINSERT_VECTOR_ELT(SDNode *N) {
return CanonicalizeBuildVector(Ops, /*FreezeUndef=*/true);
// BUILD_VECTOR - insert unused operands and build new BUILD_VECTOR.
- if (CurVec.getOpcode() == ISD::BUILD_VECTOR && CurVec.hasOneUse()) {
+ // A multi-use base is allowed if it has an undef operand and the target
+ // opts in: rebuilding only re-references its scalars, so it cannot
+ // duplicate real work, and it un-shares a poison-padded base.
+ if (CurVec.getOpcode() == ISD::BUILD_VECTOR &&
+ (CurVec.hasOneUse() ||
+ (TLI.shouldUnshareBuildVectorForInsertElt(N->getValueType(0)) &&
+ any_of(CurVec->op_values(),
+ [](SDValue Op) { return Op.isUndef(); })))) {
for (unsigned I = 0; I != NumElts; ++I)
AddBuildVectorOp(Ops, CurVec.getOperand(I), I);
return CanonicalizeBuildVector(Ops);
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 87e951e489ba5..811cc05985805 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -12845,6 +12845,13 @@ bool SITargetLowering::shouldPreservePtrArith(const Function &F,
return PtrVT == MVT::i64;
}
+bool SITargetLowering::shouldUnshareBuildVectorForInsertElt(EVT VT) const {
+ // A BUILD_VECTOR lowers to REG_SEQUENCE glue, so rebuilding a vector from
+ // scalars is cheap. Un-sharing a poison-padded base avoids copies of its
+ // undef/overwritten lanes.
+ return VT.isVector();
+}
+
bool SITargetLowering::canTransformPtrArithOutOfBounds(const Function &F,
EVT PtrVT) const {
return true;
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.h b/llvm/lib/Target/AMDGPU/SIISelLowering.h
index 86653fe6920c5..cf24e7857a77b 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.h
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.h
@@ -285,6 +285,8 @@ class SITargetLowering final : public AMDGPUTargetLowering {
bool shouldPreservePtrArith(const Function &F, EVT PtrVT) const override;
+ bool shouldUnshareBuildVectorForInsertElt(EVT VT) const override;
+
bool canTransformPtrArithOutOfBounds(const Function &F,
EVT PtrVT) const override;
diff --git a/llvm/test/CodeGen/AMDGPU/insert-vector-elt-build-vector-poison.ll b/llvm/test/CodeGen/AMDGPU/insert-vector-elt-build-vector-poison.ll
new file mode 100644
index 0000000000000..e1ddb7a01a6d7
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/insert-vector-elt-build-vector-poison.ll
@@ -0,0 +1,25 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
+; RUN: llc -mtriple=amdgpu9.00 < %s | FileCheck %s
+
+; Two vectors are derived from the same poison-padded base constant. CSE shares
+; the base BUILD_VECTOR; the combine rebuilds each insert as its own
+; BUILD_VECTOR so the shared base does not force copies of its unused lanes.
+define amdgpu_kernel void @shared_poison_base(i32 %a, i32 %b, ptr addrspace(1) %out0, ptr addrspace(1) %out1) {
+; CHECK-LABEL: shared_poison_base:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: s_load_dwordx2 s[6:7], s[4:5], 0x24
+; CHECK-NEXT: s_load_dwordx4 s[0:3], s[4:5], 0x2c
+; CHECK-NEXT: v_mov_b32_e32 v3, 0
+; CHECK-NEXT: v_mov_b32_e32 v0, 1
+; CHECK-NEXT: s_waitcnt lgkmcnt(0)
+; CHECK-NEXT: v_mov_b32_e32 v1, s6
+; CHECK-NEXT: v_mov_b32_e32 v2, s7
+; CHECK-NEXT: global_store_dwordx4 v3, v[0:3], s[0:1]
+; CHECK-NEXT: global_store_dwordx4 v3, v[2:5], s[2:3]
+; CHECK-NEXT: s_endpgm
+ %v0 = insertelement <4 x i32> <i32 1, i32 poison, i32 poison, i32 poison>, i32 %a, i64 1
+ %v1 = insertelement <4 x i32> <i32 1, i32 poison, i32 poison, i32 poison>, i32 %b, i64 0
+ store <4 x i32> %v0, ptr addrspace(1) %out0
+ store <4 x i32> %v1, ptr addrspace(1) %out1
+ ret void
+}
diff --git a/llvm/test/CodeGen/AMDGPU/splitkit-getsubrangeformask.ll b/llvm/test/CodeGen/AMDGPU/splitkit-getsubrangeformask.ll
index b83c6f851b57c..e20e5df6e0ab2 100644
--- a/llvm/test/CodeGen/AMDGPU/splitkit-getsubrangeformask.ll
+++ b/llvm/test/CodeGen/AMDGPU/splitkit-getsubrangeformask.ll
@@ -31,8 +31,8 @@ define amdgpu_gs void @_amdgpu_gs_main(i32 inreg %primShaderTableAddrLow, <31 x
; CHECK-NEXT: [[COPY13:%[0-9]+]]:sgpr_32 = COPY $sgpr10
; CHECK-NEXT: [[COPY14:%[0-9]+]]:sgpr_32 = COPY $sgpr8
; CHECK-NEXT: undef [[S_LOAD_DWORDX2_IMM:%[0-9]+]].sub0_sub1:sgpr_128 = S_LOAD_DWORDX2_IMM [[COPY]], 232, 0 :: (invariant load (s64) from %ir.39, addrspace 4)
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_IMM:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_IMM undef %130:sgpr_128, 0, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: KILL undef %130:sgpr_128
+ ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_IMM:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_IMM undef %124:sgpr_128, 0, 0 :: (dereferenceable invariant load (s32))
+ ; CHECK-NEXT: KILL undef %124:sgpr_128
; CHECK-NEXT: [[S_LSHL_B32_:%[0-9]+]]:sreg_32 = S_LSHL_B32 [[COPY5]], 4, implicit-def dead $scc
; CHECK-NEXT: [[S_LSHL_B32_1:%[0-9]+]]:sreg_32 = S_LSHL_B32 [[COPY4]], 4, implicit-def dead $scc
; CHECK-NEXT: [[S_LSHL_B32_2:%[0-9]+]]:sreg_32 = S_LSHL_B32 [[COPY3]], 4, implicit-def dead $scc
@@ -45,17 +45,17 @@ define amdgpu_gs void @_amdgpu_gs_main(i32 inreg %primShaderTableAddrLow, <31 x
; CHECK-NEXT: undef [[S_ADD_U32_:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY6]], [[S_LSHL_B32_2]], implicit-def $scc
; CHECK-NEXT: [[S_ADD_U32_:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %54:sreg_32, [[S_ASHR_I32_2]], implicit-def dead $scc, implicit $scc
; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_]], 16, 0 :: (invariant load (s128) from %ir.83, addrspace 4)
- ; CHECK-NEXT: early-clobber %73:sgpr_256 = S_LOAD_DWORDX8_IMM_ec undef %74:sreg_64, 0, 0 :: (invariant load (s256) from `ptr addrspace(4) poison`, align 16, addrspace 4)
+ ; CHECK-NEXT: early-clobber %67:sgpr_256 = S_LOAD_DWORDX8_IMM_ec undef %68:sreg_64, 0, 0 :: (invariant load (s256) from `ptr addrspace(4) poison`, align 16, addrspace 4)
; CHECK-NEXT: KILL [[S_ADD_U32_]].sub0, [[S_ADD_U32_]].sub1
- ; CHECK-NEXT: KILL undef %74:sreg_64
+ ; CHECK-NEXT: KILL undef %68:sreg_64
; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_IMM1:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_IMM [[S_LOAD_DWORDX4_IMM]], 0, 0 :: (dereferenceable invariant load (s32))
; CHECK-NEXT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
; CHECK-NEXT: undef [[S_MOV_B32_:%[0-9]+]].sub1:sgpr_128 = S_MOV_B32 0
- ; CHECK-NEXT: [[BUFFER_LOAD_DWORD_OFFSET:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_DWORD_OFFSET undef %123:sgpr_128, 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], undef %94:sgpr_128, 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN1:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], %73.sub0_sub1_sub2_sub3, 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: KILL undef %94:sgpr_128
- ; CHECK-NEXT: KILL undef %123:sgpr_128
+ ; CHECK-NEXT: [[BUFFER_LOAD_DWORD_OFFSET:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_DWORD_OFFSET undef %117:sgpr_128, 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
+ ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], undef %88:sgpr_128, 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
+ ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN1:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], %67.sub0_sub1_sub2_sub3, 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
+ ; CHECK-NEXT: KILL undef %88:sgpr_128
+ ; CHECK-NEXT: KILL undef %117:sgpr_128
; CHECK-NEXT: [[S_SUB_I32_2:%[0-9]+]]:sreg_32 = S_SUB_I32 [[S_BUFFER_LOAD_DWORD_IMM1]], 31, implicit-def dead $scc
; CHECK-NEXT: undef [[S_ADD_U32_1:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY6]], [[S_LSHL_B32_]], implicit-def $scc
; CHECK-NEXT: [[S_ADD_U32_1:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %54:sreg_32, [[S_ASHR_I32_]], implicit-def dead $scc, implicit $scc
@@ -67,15 +67,17 @@ define amdgpu_gs void @_amdgpu_gs_main(i32 inreg %primShaderTableAddrLow, <31 x
; CHECK-NEXT: KILL [[S_ADD_U32_2]].sub0, [[S_ADD_U32_2]].sub1
; CHECK-NEXT: KILL [[S_ADD_U32_1]].sub0, [[S_ADD_U32_1]].sub1
; CHECK-NEXT: [[S_ADD_U32_3:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %54:sreg_32, [[S_ASHR_I32_2]], implicit-def dead $scc, implicit $scc
- ; CHECK-NEXT: [[S_ASHR_I32_3:%[0-9]+]]:sreg_32_xm0 = S_ASHR_I32 undef %174:sreg_32, 31, implicit-def dead $scc
- ; CHECK-NEXT: undef [[S_ADD_U32_4:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY6]], undef %174:sreg_32, implicit-def $scc
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM3:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_3]], 64, 0 :: (invariant load (s128) from %ir.101, addrspace 4)
+ ; CHECK-NEXT: [[S_ASHR_I32_3:%[0-9]+]]:sreg_32_xm0 = S_ASHR_I32 undef %168:sreg_32, 31, implicit-def dead $scc
+ ; CHECK-NEXT: undef [[S_ADD_U32_4:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY6]], undef %168:sreg_32, implicit-def $scc
; CHECK-NEXT: [[S_ADD_U32_4:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %54:sreg_32, [[S_ASHR_I32_3]], implicit-def dead $scc, implicit $scc
; CHECK-NEXT: undef [[S_ADD_U32_5:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY7]].sub0, [[S_LSHL_B32_]], implicit-def $scc
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM3:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_3]], 64, 0 :: (invariant load (s128) from %ir.101, addrspace 4)
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM4:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_4]], 64, 0 :: (invariant load (s128) from %ir.109, addrspace 4)
; CHECK-NEXT: [[S_ADD_U32_5:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %51:sreg_32, [[S_ASHR_I32_]], implicit-def dead $scc, implicit $scc
; CHECK-NEXT: undef [[S_ADD_U32_6:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY7]].sub0, [[S_LSHL_B32_1]], implicit-def $scc
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM5:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_5]], 0, 0 :: (invariant load (s128) from %ir.114, addrspace 4)
; CHECK-NEXT: [[S_ADD_U32_6:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %51:sreg_32, [[S_ASHR_I32_1]], implicit-def dead $scc, implicit $scc
- ; CHECK-NEXT: undef [[S_ADD_U32_7:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY7]].sub0, undef %174:sreg_32, implicit-def $scc
+ ; CHECK-NEXT: undef [[S_ADD_U32_7:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY7]].sub0, undef %168:sreg_32, implicit-def $scc
; CHECK-NEXT: [[S_ADD_U32_7:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %51:sreg_32, [[S_ASHR_I32_3]], implicit-def dead $scc, implicit $scc
; CHECK-NEXT: undef [[S_ADD_U32_8:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY7]].sub0, [[S_LSHL_B32_2]], implicit-def $scc
; CHECK-NEXT: [[S_ADD_U32_8:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %51:sreg_32, [[S_ASHR_I32_2]], implicit-def dead $scc, implicit $scc
@@ -88,20 +90,22 @@ define amdgpu_gs void @_amdgpu_gs_main(i32 inreg %primShaderTableAddrLow, <31 x
; CHECK-NEXT: [[S_ADD_I32_:%[0-9]+]]:sreg_32 = S_ADD_I32 [[S_LSHL_B32_]], 16, implicit-def dead $scc
; CHECK-NEXT: [[S_ADD_I32_1:%[0-9]+]]:sreg_32 = S_ADD_I32 [[S_LSHL_B32_2]], 16, implicit-def dead $scc
; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM [[S_MOV_B32_]], [[S_ADD_I32_]], 0, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM1:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM [[S_MOV_B32_]], undef %307:sreg_32, 0, 0 :: (dereferenceable invariant load (s32))
+ ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM1:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM [[S_MOV_B32_]], undef %301:sreg_32, 0, 0 :: (dereferenceable invariant load (s32))
; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM2:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM [[S_MOV_B32_]], [[S_ADD_I32_1]], 0, 0 :: (dereferenceable invariant load (s32))
; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_IMM2:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_IMM [[S_MOV_B32_]], 16, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM3:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %362:sgpr_128, undef %363:sreg_32, 0, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_IMM3:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_IMM undef %373:sgpr_128, 16, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM4:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_4]], 64, 0 :: (invariant load (s128) from %ir.109, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM5:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_5]], 0, 0 :: (invariant load (s128) from %ir.114, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM6:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_6]], 0, 0 :: (invariant load (s128) from %ir.119, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM7:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_7]], 0, 0 :: (invariant load (s128) from %ir.126, addrspace 4)
+ ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM3:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %356:sgpr_128, undef %357:sreg_32, 0, 0 :: (dereferenceable invariant load (s32))
+ ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_IMM3:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_IMM undef %367:sgpr_128, 16, 0 :: (dereferenceable invariant load (s32))
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM6:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_5]], 224, 0 :: (invariant load (s128) from %ir.131, addrspace 4)
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM7:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_6]], 0, 0 :: (invariant load (s128) from %ir.119, addrspace 4)
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM8:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_6]], 224, 0 :: (invariant load (s128) from %ir.136, addrspace 4)
; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN2:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM1]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM4:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %357:sgpr_128, [[S_ADD_I32_]], 0, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM5:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %368:sgpr_128, [[S_ADD_I32_1]], 0, 0 :: (dereferenceable invariant load (s32))
+ ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM9:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_7]], 0, 0 :: (invariant load (s128) from %ir.126, addrspace 4)
+ ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM4:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %351:sgpr_128, [[S_ADD_I32_]], 0, 0 :: (dereferenceable invariant load (s32))
+ ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM5:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %362:sgpr_128, [[S_ADD_I32_1]], 0, 0 :: (dereferenceable invariant load (s32))
; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN3:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM2]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN4:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM3]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
+ ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN5:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM4]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
+ ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN6:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM5]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
; CHECK-NEXT: [[S_ADD_I32_2:%[0-9]+]]:sreg_32 = S_ADD_I32 [[S_BUFFER_LOAD_DWORD_SGPR_IMM]], -98, implicit-def dead $scc
; CHECK-NEXT: [[S_ADD_I32_3:%[0-9]+]]:sreg_32 = S_ADD_I32 [[S_BUFFER_LOAD_DWORD_SGPR_IMM1]], -114, implicit-def dead $scc
; CHECK-NEXT: [[S_ADD_I32_4:%[0-9]+]]:sreg_32 = S_ADD_I32 [[S_BUFFER_LOAD_DWORD_SGPR_IMM2]], -130, implicit-def dead $scc
@@ -115,17 +119,16 @@ define amdgpu_gs void @_amdgpu_gs_main(i32 inreg %primShaderTableAddrLow, <31 x
; CHECK-NEXT: undef [[S_ADD_U32_15:%[0-9]+]].sub0:sreg_64 = S_ADD_U32 [[COPY11]], [[S_LSHL_B32_2]], implicit-def $scc
; CHECK-NEXT: [[S_ADD_U32_15:%[0-9]+]].sub1:sreg_64 = S_ADDC_U32 undef %39:sreg_32, [[S_ASHR_I32_2]], implicit-def dead $scc, implicit $scc
; CHECK-NEXT: [[S_LSHL4_ADD_U32_:%[0-9]+]]:sreg_32 = S_LSHL4_ADD_U32 [[COPY12]], 16, implicit-def dead $scc
- ; CHECK-NEXT: [[S_BUFFER_LOAD_DWORD_SGPR_IMM6:%[0-9]+]]:sreg_32_xm0_xexec = S_BUFFER_LOAD_DWORD_SGPR_IMM undef %388:sgpr_128, [[S_LSHL4_ADD_U32_]], 0, 0 :: (dereferenceable invariant load (s32))
- ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN5:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM4]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM8:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_5]], 224, 0 :: (invariant load (s128) from %ir.131, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM9:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[COPY7]], 224, 0 :: (invariant load (s128) from %ir.147, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM10:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_5]], 576, 0 :: (invariant load (s128) from %ir.152, addrspace 4)
- ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN6:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM5]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM11:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_6]], 224, 0 :: (invariant load (s128) from %ir.136, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM12:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_7]], 576, 0 :: (invariant load (s128) from %ir.164, addrspace 4)
- ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM13:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[S_ADD_U32_8]], 224, 0 :: (invariant load (s128) from %ir.142, addrspace 4)
- ; CHECK-NEXT: [[BUFFER_LOAD_FORMAT_X_IDXEN7:%[0-9]+]]:vgpr_32 = BUFFER_LOAD_FORMAT_X_IDXEN [[V_MOV_B32_e32_]], [[S_LOAD_DWORDX4_IMM6]], 0, 0, 0, 0, implicit $exec :: (dereferenceable load (s32), align 1, addrspace 8)
- ; CHECK-NEXT: [[BUFFER_LOAD_FO...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/210905
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