[llvm] [Cygwin] Cygwin X86ISelDAGToDAG.cpp (PR #76284)

[徐持恒 Xu Chiheng via llvm-commits]

https://github.com/xu-chiheng updated https://github.com/llvm/llvm-project/pull/76284

>From 25497274dfddcaeddbd85ac5fe0da59dd6f256a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=8C=81=E6=81=92=20Xu=20Chiheng?=
 <chiheng.xu at gmail.com>
Date: Thu, 4 Jan 2024 16:12:05 +0800
Subject: [PATCH 1/4] 1

---
 llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index 77a997588c4fee..c478f1c3fd30c8 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2944,6 +2944,18 @@ bool X86DAGToDAGISel::selectMOV64Imm32(SDValue N, SDValue &Imm) {
     return false;
 
   Imm = N;
+  if (Subtarget->isTargetWindowsCygwin() && Subtarget->is64Bit()) {
+    if (N->getOpcode() != ISD::TargetGlobalAddress)
+      return TM.getCodeModel() == CodeModel::Small;
+
+    std::optional<ConstantRange> CR =
+        cast<GlobalAddressSDNode>(N)->getGlobal()->getAbsoluteSymbolRange();
+    if (!CR)
+      return TM.getCodeModel() == CodeModel::Small;
+
+    return CR->getUnsignedMax().ult(1ull << 32);
+  }
+
   // Small/medium code model can reference non-TargetGlobalAddress objects with
   // 32 bit constants.
   if (N->getOpcode() != ISD::TargetGlobalAddress) {

>From 88f721e19b59be2881fbc85c75daa47559ef508d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=8C=81=E6=81=92=20Xu=20Chiheng?=
 <chiheng.xu at gmail.com>
Date: Thu, 4 Jan 2024 18:18:50 +0800
Subject: [PATCH 2/4] 1

---
 llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index c478f1c3fd30c8..66acb07f0a2826 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2944,30 +2944,18 @@ bool X86DAGToDAGISel::selectMOV64Imm32(SDValue N, SDValue &Imm) {
     return false;
 
   Imm = N;
-  if (Subtarget->isTargetWindowsCygwin() && Subtarget->is64Bit()) {
-    if (N->getOpcode() != ISD::TargetGlobalAddress)
-      return TM.getCodeModel() == CodeModel::Small;
-
-    std::optional<ConstantRange> CR =
-        cast<GlobalAddressSDNode>(N)->getGlobal()->getAbsoluteSymbolRange();
-    if (!CR)
-      return TM.getCodeModel() == CodeModel::Small;
-
-    return CR->getUnsignedMax().ult(1ull << 32);
-  }
-
   // Small/medium code model can reference non-TargetGlobalAddress objects with
   // 32 bit constants.
   if (N->getOpcode() != ISD::TargetGlobalAddress) {
     return TM.getCodeModel() == CodeModel::Small ||
-           TM.getCodeModel() == CodeModel::Medium;
+           (!(Subtarget->isTargetWindowsCygwin() && Subtarget->is64Bit()) && TM.getCodeModel() == CodeModel::Medium );
   }
+  std::optional<ConstantRange> CR =
+      cast<GlobalAddressSDNode>(N)->getGlobal()->getAbsoluteSymbolRange();
+  if (!CR)
+    return TM.getCodeModel() == CodeModel::Small;
 
-  const GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
-  if (std::optional<ConstantRange> CR = GV->getAbsoluteSymbolRange())
-    return CR->getUnsignedMax().ult(1ull << 32);
-
-  return !TM.isLargeGlobalValue(GV);
+  return CR->getUnsignedMax().ult(1ull << 32);
 }
 
 bool X86DAGToDAGISel::selectLEA64_32Addr(SDValue N, SDValue &Base,

>From aa5679e04a344f20ece425b97f5ea51300bde16c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=8C=81=E6=81=92=20Xu=20Chiheng?=
 <chiheng.xu at gmail.com>
Date: Thu, 4 Jan 2024 18:24:30 +0800
Subject: [PATCH 3/4] 1

---
 llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index 66acb07f0a2826..0384e541ad2c07 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2948,7 +2948,8 @@ bool X86DAGToDAGISel::selectMOV64Imm32(SDValue N, SDValue &Imm) {
   // 32 bit constants.
   if (N->getOpcode() != ISD::TargetGlobalAddress) {
     return TM.getCodeModel() == CodeModel::Small ||
-           (!(Subtarget->isTargetWindowsCygwin() && Subtarget->is64Bit()) && TM.getCodeModel() == CodeModel::Medium );
+           (!(Subtarget->isTargetWindowsCygwin() && Subtarget->is64Bit()) &&
+            TM.getCodeModel() == CodeModel::Medium);
   }
   std::optional<ConstantRange> CR =
       cast<GlobalAddressSDNode>(N)->getGlobal()->getAbsoluteSymbolRange();

>From 02e52e8fe0299e30bfe0ff52f5de033e52eabfc0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=8C=81=E6=81=92=20Xu=20Chiheng?=
 <chiheng.xu at gmail.com>
Date: Thu, 4 Jan 2024 18:45:20 +0800
Subject: [PATCH 4/4] 1

---
 llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index 0384e541ad2c07..b7fb3f3a214982 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2951,12 +2951,19 @@ bool X86DAGToDAGISel::selectMOV64Imm32(SDValue N, SDValue &Imm) {
            (!(Subtarget->isTargetWindowsCygwin() && Subtarget->is64Bit()) &&
             TM.getCodeModel() == CodeModel::Medium);
   }
+#if 0
   std::optional<ConstantRange> CR =
       cast<GlobalAddressSDNode>(N)->getGlobal()->getAbsoluteSymbolRange();
   if (!CR)
     return TM.getCodeModel() == CodeModel::Small;
 
   return CR->getUnsignedMax().ult(1ull << 32);
+#endif
+  const GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
+  if (std::optional<ConstantRange> CR = GV->getAbsoluteSymbolRange())
+    return CR->getUnsignedMax().ult(1ull << 32);
+
+  return !TM.isLargeGlobalValue(GV);
 }
 
 bool X86DAGToDAGISel::selectLEA64_32Addr(SDValue N, SDValue &Base,