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14281187ed
see: https://github.com/llvm/llvm-project/issues/82330 https://github.com/llvm/llvm-project/pull/82332
84 lines
2.8 KiB
Diff
84 lines
2.8 KiB
Diff
From 525b1a631e3d858df1cf5e9e64dace666dc851bb Mon Sep 17 00:00:00 2001
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From: WANG Rui <wangrui@loongson.cn>
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Date: Tue, 20 Feb 2024 17:41:36 +0800
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Subject: [PATCH] [LoongArch] Assume no-op addrspacecasts by default
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Fixes #82330
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---
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.../Target/LoongArch/LoongArchTargetMachine.h | 5 ++
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llvm/test/CodeGen/LoongArch/addrspacecast.ll | 47 +++++++++++++++++++
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2 files changed, 52 insertions(+)
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create mode 100644 llvm/test/CodeGen/LoongArch/addrspacecast.ll
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diff --git a/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h b/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h
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index 7d39d47e86b3..fa9bc7608e7d 100644
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--- a/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h
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+++ b/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h
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@@ -45,6 +45,11 @@ public:
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MachineFunctionInfo *
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createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
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const TargetSubtargetInfo *STI) const override;
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+
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+ // Addrspacecasts are always noops.
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+ bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
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+ return true;
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+ }
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};
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} // end namespace llvm
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diff --git a/llvm/test/CodeGen/LoongArch/addrspacecast.ll b/llvm/test/CodeGen/LoongArch/addrspacecast.ll
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new file mode 100644
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index 000000000000..2b90f32d0297
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--- /dev/null
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+++ b/llvm/test/CodeGen/LoongArch/addrspacecast.ll
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@@ -0,0 +1,47 @@
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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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+; RUN: llc -mtriple=loongarch32 -verify-machineinstrs < %s | FileCheck %s --check-prefix=LA32
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+; RUN: llc -mtriple=loongarch64 -verify-machineinstrs < %s | FileCheck %s --check-prefix=LA64
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+
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+define void @cast0(ptr addrspace(1) %ptr) {
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+; LA32-LABEL: cast0:
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+; LA32: # %bb.0:
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+; LA32-NEXT: st.w $zero, $a0, 0
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+; LA32-NEXT: ret
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+;
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+; LA64-LABEL: cast0:
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+; LA64: # %bb.0:
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+; LA64-NEXT: st.w $zero, $a0, 0
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+; LA64-NEXT: ret
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+ %ptr0 = addrspacecast ptr addrspace(1) %ptr to ptr addrspace(0)
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+ store i32 0, ptr %ptr0
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+ ret void
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+}
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+
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+define void @cast1(ptr %ptr) {
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+; LA32-LABEL: cast1:
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+; LA32: # %bb.0:
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+; LA32-NEXT: addi.w $sp, $sp, -16
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+; LA32-NEXT: .cfi_def_cfa_offset 16
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+; LA32-NEXT: st.w $ra, $sp, 12 # 4-byte Folded Spill
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+; LA32-NEXT: .cfi_offset 1, -4
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+; LA32-NEXT: bl %plt(foo)
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+; LA32-NEXT: ld.w $ra, $sp, 12 # 4-byte Folded Reload
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+; LA32-NEXT: addi.w $sp, $sp, 16
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+; LA32-NEXT: ret
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+;
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+; LA64-LABEL: cast1:
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+; LA64: # %bb.0:
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+; LA64-NEXT: addi.d $sp, $sp, -16
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+; LA64-NEXT: .cfi_def_cfa_offset 16
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+; LA64-NEXT: st.d $ra, $sp, 8 # 8-byte Folded Spill
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+; LA64-NEXT: .cfi_offset 1, -8
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+; LA64-NEXT: bl %plt(foo)
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+; LA64-NEXT: ld.d $ra, $sp, 8 # 8-byte Folded Reload
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+; LA64-NEXT: addi.d $sp, $sp, 16
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+; LA64-NEXT: ret
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+ %castptr = addrspacecast ptr %ptr to ptr addrspace(10)
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+ call void @foo(ptr addrspace(10) %castptr)
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+ ret void
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+}
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+
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+declare void @foo(ptr addrspace(10))
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--
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2.27.0
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