[PATCH] D157950: [RISCV][GISel] Mark G_GLOBAL_VALUE as legal.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157950

Files:
  llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-global.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-global.mir


Index: llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-global.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-global.mir
@@ -0,0 +1,33 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=riscv64 -run-pass=legalizer %s -o - | FileCheck %s
+
+--- |
+  @var = global i32 0
+
+  define ptr @test_global() {
+    ret ptr @var
+  }
+
+...
+---
+name:            test_global
+alignment:       4
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: _ }
+frameInfo:
+  maxAlignment:    1
+machineFunctionInfo:
+  varArgsFrameIndex: 0
+  varArgsSaveSize: 0
+body:             |
+  bb.1 (%ir-block.0):
+    ; CHECK-LABEL: name: test_global
+    ; CHECK: [[GV:%[0-9]+]]:_(p0) = G_GLOBAL_VALUE @var
+    ; CHECK-NEXT: $x10 = COPY [[GV]](p0)
+    ; CHECK-NEXT: PseudoRET implicit $x10
+    %0:_(p0) = G_GLOBAL_VALUE @var
+    $x10 = COPY %0(p0)
+    PseudoRET implicit $x10
+
+...
Index: llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-global.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-global.mir
@@ -0,0 +1,33 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=riscv32 -run-pass=legalizer %s -o - | FileCheck %s
+
+--- |
+  @var = global i32 0
+
+  define ptr @test_global() {
+    ret ptr @var
+  }
+
+...
+---
+name:            test_global
+alignment:       4
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: _ }
+frameInfo:
+  maxAlignment:    1
+machineFunctionInfo:
+  varArgsFrameIndex: 0
+  varArgsSaveSize: 0
+body:             |
+  bb.1 (%ir-block.0):
+    ; CHECK-LABEL: name: test_global
+    ; CHECK: [[GV:%[0-9]+]]:_(p0) = G_GLOBAL_VALUE @var
+    ; CHECK-NEXT: $x10 = COPY [[GV]](p0)
+    ; CHECK-NEXT: PseudoRET implicit $x10
+    %0:_(p0) = G_GLOBAL_VALUE @var
+    $x10 = COPY %0(p0)
+    PseudoRET implicit $x10
+
+...
Index: llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
===================================================================
--- llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
+++ llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
@@ -89,5 +89,8 @@
       .widenScalarToNextPow2(0)
       .clampScalar(0, XLenLLT, XLenLLT);
 
+  getActionDefinitionsBuilder(G_GLOBAL_VALUE)
+      .legalFor({p0});
+
   getLegacyLegalizerInfo().computeTables();
 }


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