[X86] Fix value-extending/truncating loads and stores of __ptr32/__ptr64 pointers (#67168)

The value extension and truncation were missed during casting __ptr32/__ptr64
pointers to the default address space.

Closes #66873

Author: e-kud

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -49835,9 +49835,9 @@ static SDValue combineLoad(SDNode *N, SelectionDAG &DAG,
     if (PtrVT != Ld->getBasePtr().getSimpleValueType()) {
       SDValue Cast =
           DAG.getAddrSpaceCast(dl, PtrVT, Ld->getBasePtr(), AddrSpace, 0);
-      return DAG.getLoad(RegVT, dl, Ld->getChain(), Cast, Ld->getPointerInfo(),
-                         Ld->getOriginalAlign(),
-                         Ld->getMemOperand()->getFlags());
+      return DAG.getExtLoad(Ext, dl, RegVT, Ld->getChain(), Cast,
+                            Ld->getPointerInfo(), MemVT, Ld->getOriginalAlign(),
+                            Ld->getMemOperand()->getFlags());
     }
   }
 
@@ -50339,9 +50339,10 @@ static SDValue combineStore(SDNode *N, SelectionDAG &DAG,
     if (PtrVT != St->getBasePtr().getSimpleValueType()) {
       SDValue Cast =
           DAG.getAddrSpaceCast(dl, PtrVT, St->getBasePtr(), AddrSpace, 0);
-      return DAG.getStore(St->getChain(), dl, StoredVal, Cast,
-                          St->getPointerInfo(), St->getOriginalAlign(),
-                          St->getMemOperand()->getFlags(), St->getAAInfo());
+      return DAG.getTruncStore(
+          St->getChain(), dl, StoredVal, Cast, St->getPointerInfo(), StVT,
+          St->getOriginalAlign(), St->getMemOperand()->getFlags(),
+          St->getAAInfo());
     }
   }
 

llvm/test/CodeGen/X86/mixed-ptr-sizes.ll

@@ -261,7 +261,7 @@ define i64 @test_load_sptr32_zext_i64(ptr addrspace(270) %i) {
 ; CHECK-LABEL: test_load_sptr32_zext_i64:
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    movslq %ecx, %rax
-; CHECK-NEXT:    movq (%rax), %rax
+; CHECK-NEXT:    movl (%rax), %eax
 ; CHECK-NEXT:    retq
 ;
 ; CHECK-O0-LABEL: test_load_sptr32_zext_i64:
@@ -278,11 +278,20 @@ entry:
 }
 
 define void @test_store_sptr32_trunc_i1(ptr addrspace(270) %s, i32 %i) {
-; ALL-LABEL: test_store_sptr32_trunc_i1:
-; ALL:       # %bb.0: # %entry
-; ALL-NEXT:    movslq %ecx, %rax
-; ALL-NEXT:    movl %edx, (%rax)
-; ALL-NEXT:    retq
+; CHECK-LABEL: test_store_sptr32_trunc_i1:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    movslq %ecx, %rax
+; CHECK-NEXT:    andl $1, %edx
+; CHECK-NEXT:    movb %dl, (%rax)
+; CHECK-NEXT:    retq
+;
+; CHECK-O0-LABEL: test_store_sptr32_trunc_i1:
+; CHECK-O0:       # %bb.0: # %entry
+; CHECK-O0-NEXT:    movslq %ecx, %rax
+; CHECK-O0-NEXT:    andl $1, %edx
+; CHECK-O0-NEXT:    movb %dl, %cl
+; CHECK-O0-NEXT:    movb %cl, (%rax)
+; CHECK-O0-NEXT:    retq
 entry:
   %0 = trunc i32 %i to i1
   store i1 %0, ptr addrspace(270) %s