From 96aa751760b4efc3424a82b573057008bc639c3b Mon Sep 17 00:00:00 2001
From: Lukas Zaoral <lzaoral@redhat.com>
Date: Thu, 27 May 2021 21:20:58 +0200
Subject: llvm12: Implement llvm.{s,u}{max,min} intrinsics

The vector variants are not implemented at the moment.
See: https://reviews.llvm.org/D84125

Co-authored-by: Lukas Zaoral <lzaoral@redhat.com>
Co-authored-by: Martin Nowack <m.nowack@imperial.ac.uk>
---
 lib/Core/Executor.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'lib/Core')

diff --git a/lib/Core/Executor.cpp b/lib/Core/Executor.cpp
index aaa56a55..a8ca86c2 100644
--- a/lib/Core/Executor.cpp
+++ b/lib/Core/Executor.cpp
@@ -1720,6 +1720,35 @@ void Executor::executeCall(ExecutionState &state, KInstruction *ki, Function *f,
       break;
     }
 
+#if LLVM_VERSION_CODE >= LLVM_VERSION(12, 0)
+    case Intrinsic::smax:
+    case Intrinsic::smin:
+    case Intrinsic::umax:
+    case Intrinsic::umin: {
+      if (isa<VectorType>(i->getOperand(0)->getType()) ||
+          isa<VectorType>(i->getOperand(1)->getType()))
+        return terminateStateOnExecError(
+            state, "llvm.{s,u}{max,min} with vectors is not supported");
+
+      ref<Expr> op1 = eval(ki, 1, state).value;
+      ref<Expr> op2 = eval(ki, 2, state).value;
+
+      ref<Expr> cond = nullptr;
+      if (f->getIntrinsicID() == Intrinsic::smax)
+        cond = SgtExpr::create(op1, op2);
+      else if (f->getIntrinsicID() == Intrinsic::smin)
+        cond = SltExpr::create(op1, op2);
+      else if (f->getIntrinsicID() == Intrinsic::umax)
+        cond = UgtExpr::create(op1, op2);
+      else // (f->getIntrinsicID() == Intrinsic::umin)
+        cond = UltExpr::create(op1, op2);
+
+      ref<Expr> result = SelectExpr::create(cond, op1, op2);
+      bindLocal(ki, state, result);
+      break;
+    }
+#endif
+
 #if LLVM_VERSION_CODE >= LLVM_VERSION(7, 0)
     case Intrinsic::fshr:
     case Intrinsic::fshl: {
-- 
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