[llvm] b60e628 - [RISCV][CostModel] Remove cost of icmp inst in icmp+select with SFB. (#91158)
via llvm-commits
llvm-commits at lists.llvm.org
Mon May 20 01:03:21 PDT 2024
Author: Elvis Wang
Date: 2024-05-20T16:03:18+08:00
New Revision: b60e62896e2665e1a0ac51fc9942c1c4d31c0f53
URL: https://github.com/llvm/llvm-project/commit/b60e62896e2665e1a0ac51fc9942c1c4d31c0f53
DIFF: https://github.com/llvm/llvm-project/commit/b60e62896e2665e1a0ac51fc9942c1c4d31c0f53.diff
LOG: [RISCV][CostModel] Remove cost of icmp inst in icmp+select with SFB. (#91158)
With ShortFowrardBranchOpt(SFB) or ConditionalMoveFusion, scalar
ICmp and scalar Select instructions will lower to SELECT_CC
and lower to PseudoCCMOVGPR which will generate a conditional
branch instruction and a move instruction.
The cost of scalar (ICmp + Select) = (0 + Select instruction cost)
Added:
llvm/test/Analysis/CostModel/RISCV/cmp-select.ll
Modified:
llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index b73ed208ed74c..ca8279672c096 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -14,9 +14,11 @@
#include "llvm/CodeGen/CostTable.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/IR/Instructions.h"
+#include "llvm/IR/PatternMatch.h"
#include <cmath>
#include <optional>
using namespace llvm;
+using namespace llvm::PatternMatch;
#define DEBUG_TYPE "riscvtti"
@@ -1469,6 +1471,21 @@ InstructionCost RISCVTTIImpl::getCmpSelInstrCost(unsigned Opcode, Type *ValTy,
}
}
+ // With ShortForwardBranchOpt or ConditionalMoveFusion, scalar icmp + select
+ // instructions will lower to SELECT_CC and lower to PseudoCCMOVGPR which will
+ // generate a conditional branch + mv. The cost of scalar (icmp + select) will
+ // be (0 + select instr cost).
+ if (ST->hasConditionalMoveFusion() && I && isa<ICmpInst>(I) &&
+ ValTy->isIntegerTy() && !I->user_empty()) {
+ if (all_of(I->users(), [&](const User *U) {
+ return match(U, m_Select(m_Specific(I), m_Value(), m_Value())) &&
+ U->getType()->isIntegerTy() &&
+ !isa<ConstantData>(U->getOperand(1)) &&
+ !isa<ConstantData>(U->getOperand(2));
+ }))
+ return 0;
+ }
+
// TODO: Add cost for scalar type.
return BaseT::getCmpSelInstrCost(Opcode, ValTy, CondTy, VecPred, CostKind, I);
diff --git a/llvm/test/Analysis/CostModel/RISCV/cmp-select.ll b/llvm/test/Analysis/CostModel/RISCV/cmp-select.ll
new file mode 100644
index 0000000000000..dc0810b128698
--- /dev/null
+++ b/llvm/test/Analysis/CostModel/RISCV/cmp-select.ll
@@ -0,0 +1,258 @@
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
+; RUN: opt < %s -mtriple=riscv64 -mattr=+v,+f,+short-forward-branch-opt -passes="print<cost-model>" -cost-kind=throughput 2>&1 -disable-output | FileCheck %s --check-prefixes=SFB64
+; RUN: opt < %s -mtriple=riscv64 -mattr=+v,+f -passes="print<cost-model>" -cost-kind=throughput 2>&1 -disable-output | FileCheck %s --check-prefixes=RV64
+
+define i32 @icmp-iselect(i64 %ca, i64 %cb, i32 %a, i32 %b) {
+; SFB64-LABEL: 'icmp-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %select1
+;
+; RV64-LABEL: 'icmp-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %select1
+;
+ %cmp1 = icmp slt i64 %ca, %cb
+ %select1 = select i1 %cmp1, i32 %a, i32 %b
+ ret i32 %select1
+}
+
+define i32 @icmp-iselects(i64 %ca, i64 %cb, i32 %a, i32 %b, i32 %c) {
+; SFB64-LABEL: 'icmp-iselects'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select2 = select i1 %cmp1, i32 %a, i32 %c
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %ret = add i32 %select1, %select2
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %ret
+;
+; RV64-LABEL: 'icmp-iselects'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select2 = select i1 %cmp1, i32 %a, i32 %c
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %ret = add i32 %select1, %select2
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %ret
+;
+ %cmp1 = icmp slt i64 %ca, %cb
+ %select1 = select i1 %cmp1, i32 %a, i32 %b
+ %select2 = select i1 %cmp1, i32 %a, i32 %c
+ %ret = add i32 %select1, %select2
+ ret i32 %ret
+}
+
+define i32 @icmp-ifselects(i64 %ca, i64 %cb, i32 %a, i32 %b, float %c, float %d) {
+; SFB64-LABEL: 'icmp-ifselects'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select2 = select i1 %cmp1, float %c, float %d
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %selectint = fptosi float %select2 to i32
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %ret = add i32 %select1, %selectint
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %ret
+;
+; RV64-LABEL: 'icmp-ifselects'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select2 = select i1 %cmp1, float %c, float %d
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %selectint = fptosi float %select2 to i32
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %ret = add i32 %select1, %selectint
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %ret
+;
+ %cmp1 = icmp slt i64 %ca, %cb
+ %select1 = select i1 %cmp1, i32 %a, i32 %b
+ %select2 = select i1 %cmp1, float %c, float %d
+ %selectint = fptosi float %select2 to i32
+ %ret = add i32 %select1, %selectint
+ ret i32 %ret
+}
+
+define i32 @constant-icmp-iselect(i64 %ca, i64 %cb, i32 %a) {
+; SFB64-LABEL: 'constant-icmp-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 7
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %select1
+;
+; RV64-LABEL: 'constant-icmp-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %cmp1 = icmp slt i64 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %cmp1, i32 %a, i32 7
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %select1
+;
+ %cmp1 = icmp slt i64 %ca, %cb
+ %select1 = select i1 %cmp1, i32 %a, i32 7
+ ret i32 %select1
+}
+
+define i32 @fcmp-iselect(float %ca, float %cb, i32 %a, i32 %b) {
+; SFB64-LABEL: 'fcmp-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %fcmp1, i32 %a, i32 %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %select1
+;
+; RV64-LABEL: 'fcmp-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select i1 %fcmp1, i32 %a, i32 %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 %select1
+;
+ %fcmp1 = fcmp ogt float %ca, %cb
+ %select1 = select i1 %fcmp1, i32 %a, i32 %b
+ ret i32 %select1
+}
+
+define float @fcmp-fselect(float %ca, float %cb, float %a, float %b) {
+; SFB64-LABEL: 'fcmp-fselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fselect1 = select i1 %fcmp1, float %a, float %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %fselect1
+;
+; RV64-LABEL: 'fcmp-fselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fselect1 = select i1 %fcmp1, float %a, float %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %fselect1
+;
+ %fcmp1 = fcmp ogt float %ca, %cb
+ %fselect1 = select i1 %fcmp1, float %a, float %b
+ ret float %fselect1
+}
+
+define float @icmp-fselect(i64 %ca, i64 %cb, float %a, float %b) {
+; SFB64-LABEL: 'icmp-fselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt i64 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fselect1 = select i1 %icmp1, float %a, float %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %fselect1
+;
+; RV64-LABEL: 'icmp-fselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt i64 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fselect1 = select i1 %icmp1, float %a, float %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %fselect1
+;
+ %icmp1 = icmp slt i64 %ca, %cb
+ %fselect1 = select i1 %icmp1, float %a, float %b
+ ret float %fselect1
+}
+
+define <2 x i32> @vector-icmp-vector-iselect(<2 x i32> %ca, <2 x i32> %cb, <2 x i32> %a, <2 x i32> %b) {
+; SFB64-LABEL: 'vector-icmp-vector-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp = icmp slt <2 x i32> %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %icmp, <2 x i32> %a, <2 x i32> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+; RV64-LABEL: 'vector-icmp-vector-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp = icmp slt <2 x i32> %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %icmp, <2 x i32> %a, <2 x i32> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+ %icmp = icmp slt <2 x i32> %ca, %cb
+ %select1 = select <2 x i1> %icmp, <2 x i32> %a, <2 x i32> %b
+ ret <2 x i32> %select1
+}
+
+define <2 x i32> @vector-fcmp-vector-iselect(<2 x float> %ca, <2 x float> %cb, <2 x i32> %a, <2 x i32> %b) {
+; SFB64-LABEL: 'vector-fcmp-vector-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt <2 x float> %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %fcmp1, <2 x i32> %a, <2 x i32> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+; RV64-LABEL: 'vector-fcmp-vector-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt <2 x float> %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %fcmp1, <2 x i32> %a, <2 x i32> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+ %fcmp1 = fcmp ogt <2 x float> %ca, %cb
+ %select1 = select <2 x i1> %fcmp1, <2 x i32> %a, <2 x i32> %b
+ ret <2 x i32> %select1
+}
+
+define <2 x float> @vector-fcmp-vector-fselect(<2 x float> %ca, <2 x float> %cb, <2 x float> %a, <2 x float> %b) {
+; SFB64-LABEL: 'vector-fcmp-vector-fselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt <2 x float> %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %fcmp1, <2 x float> %a, <2 x float> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+; RV64-LABEL: 'vector-fcmp-vector-fselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt <2 x float> %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %fcmp1, <2 x float> %a, <2 x float> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+ %fcmp1 = fcmp ogt <2 x float> %ca, %cb
+ %select1 = select <2 x i1> %fcmp1, <2 x float> %a, <2 x float> %b
+ ret <2 x float> %select1
+}
+
+define <2 x float> @vector-icmp-vector-fselect(<2 x i32> %ca, <2 x i32> %cb, <2 x float> %a, <2 x float> %b) {
+; SFB64-LABEL: 'vector-icmp-vector-fselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt <2 x i32> %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %icmp1, <2 x float> %a, <2 x float> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+; RV64-LABEL: 'vector-icmp-vector-fselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt <2 x i32> %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %select1 = select <2 x i1> %icmp1, <2 x float> %a, <2 x float> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+ %icmp1 = icmp slt <2 x i32> %ca, %cb
+ %select1 = select <2 x i1> %icmp1, <2 x float> %a, <2 x float> %b
+ ret <2 x float> %select1
+}
+
+define <2 x float> @icmp-vector-fselect(i1 %ca, i1 %cb, <2 x float> %a, <2 x float> %b) {
+; SFB64-LABEL: 'icmp-vector-fselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt i1 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %icmp1, <2 x float> %a, <2 x float> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+; RV64-LABEL: 'icmp-vector-fselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt i1 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %icmp1, <2 x float> %a, <2 x float> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+ %icmp1 = icmp slt i1 %ca, %cb
+ %select1 = select i1 %icmp1, <2 x float> %a, <2 x float> %b
+ ret <2 x float> %select1
+}
+
+define <2 x i32> @icmp-vector-iselect(i1 %ca, i1 %cb, <2 x i32> %a, <2 x i32> %b) {
+; SFB64-LABEL: 'icmp-vector-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt i1 %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %icmp1, <2 x i32> %a, <2 x i32> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+; RV64-LABEL: 'icmp-vector-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %icmp1 = icmp slt i1 %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %icmp1, <2 x i32> %a, <2 x i32> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+ %icmp1 = icmp slt i1 %ca, %cb
+ %select1 = select i1 %icmp1, <2 x i32> %a, <2 x i32> %b
+ ret <2 x i32> %select1
+}
+
+define <2 x float> @fcmp-vector-fselect(float %ca, float %cb, <2 x float> %a, <2 x float> %b) {
+; SFB64-LABEL: 'fcmp-vector-fselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %fcmp1, <2 x float> %a, <2 x float> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+; RV64-LABEL: 'fcmp-vector-fselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %fcmp1, <2 x float> %a, <2 x float> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x float> %select1
+;
+ %fcmp1 = fcmp ogt float %ca, %cb
+ %select1 = select i1 %fcmp1, <2 x float> %a, <2 x float> %b
+ ret <2 x float> %select1
+}
+
+define <2 x i32> @fcmp-vector-iselect(float %ca, float %cb, <2 x i32> %a, <2 x i32> %b) {
+; SFB64-LABEL: 'fcmp-vector-iselect'
+; SFB64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; SFB64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %fcmp1, <2 x i32> %a, <2 x i32> %b
+; SFB64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+; RV64-LABEL: 'fcmp-vector-iselect'
+; RV64-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %fcmp1 = fcmp ogt float %ca, %cb
+; RV64-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %select1 = select i1 %fcmp1, <2 x i32> %a, <2 x i32> %b
+; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <2 x i32> %select1
+;
+ %fcmp1 = fcmp ogt float %ca, %cb
+ %select1 = select i1 %fcmp1, <2 x i32> %a, <2 x i32> %b
+ ret <2 x i32> %select1
+}
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