release/19.x: [Hexagon] Only handle simple types memory accesses (#120654)

[llvmbot]

Backport 8177bf5

Requested by: @androm3da

[llvmbot]

@androm3da What do you think about merging this PR to the release branch?

[llvmbot]

@llvm/pr-subscribers-backend-hexagon

Author: None (llvmbot)

Changes

Backport 8177bf5

Requested by: @androm3da

---

Full diff: https://github.com/llvm/llvm-project/pull/121061.diff

2 Files Affected:

• (modified) llvm/lib/Target/Hexagon/HexagonISelLowering.cpp (+4)
• (added) llvm/test/CodeGen/Hexagon/simple-types-mem.ll (+22)

diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
index 7aeaebc584c64c..995c5143e0a52a 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -3796,6 +3796,8 @@ EVT HexagonTargetLowering::getOptimalMemOpType(
 bool HexagonTargetLowering::allowsMemoryAccess(
     LLVMContext &Context, const DataLayout &DL, EVT VT, unsigned AddrSpace,
     Align Alignment, MachineMemOperand::Flags Flags, unsigned *Fast) const {
+  if (!VT.isSimple())
+    return false;
   MVT SVT = VT.getSimpleVT();
   if (Subtarget.isHVXVectorType(SVT, true))
     return allowsHvxMemoryAccess(SVT, Flags, Fast);
@@ -3806,6 +3808,8 @@ bool HexagonTargetLowering::allowsMemoryAccess(
 bool HexagonTargetLowering::allowsMisalignedMemoryAccesses(
     EVT VT, unsigned AddrSpace, Align Alignment, MachineMemOperand::Flags Flags,
     unsigned *Fast) const {
+  if (!VT.isSimple())
+    return false;
   MVT SVT = VT.getSimpleVT();
   if (Subtarget.isHVXVectorType(SVT, true))
     return allowsHvxMisalignedMemoryAccesses(SVT, Flags, Fast);
diff --git a/llvm/test/CodeGen/Hexagon/simple-types-mem.ll b/llvm/test/CodeGen/Hexagon/simple-types-mem.ll
new file mode 100644
index 00000000000000..01baa65a593531
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/simple-types-mem.ll
@@ -0,0 +1,22 @@
+; RUN: llc -march=hexagon < %s
+; REQUIRES: asserts
+
+; Only simple types memory accesses are handled.
+
+target triple = "hexagon"
+
+%struct.hoge = type { i320 }
+
+define dso_local void @widget() {
+bb:
+  %tmp = alloca %struct.hoge, align 1
+  %tmp1 = bitcast %struct.hoge* %tmp to i320*
+  %tmp2 = load i320, i320* %tmp1, align 1
+  %tmp3 = and i320 %tmp2, -18446744073709551616
+  %tmp4 = or i320 %tmp3, 0
+  store i320 %tmp4, i320* %tmp1, align 1
+  call void @llvm.trap()
+  unreachable
+}
+
+declare void @llvm.trap()

[github-actions]

@androm3da (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix. When you are done, please add the release:note label to this PR.