[llvm] 0ff3d72 - [GlobalISel] Make IRTranslator able to handle PHIs with empty types. (#73235)
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Mon Jan 15 08:26:37 PST 2024
Author: Dávid Ferenc Szabó
Date: 2024-01-15T23:26:30+07:00
New Revision: 0ff3d729f92b3878d48eb1179649d7bb5feecd02
URL: https://github.com/llvm/llvm-project/commit/0ff3d729f92b3878d48eb1179649d7bb5feecd02
DIFF: https://github.com/llvm/llvm-project/commit/0ff3d729f92b3878d48eb1179649d7bb5feecd02.diff
LOG: [GlobalISel] Make IRTranslator able to handle PHIs with empty types. (#73235)
SelectionDAG already handle this since
e53b7d1a11d180ed7b33190a837d8898ab2a0b71.
Added:
llvm/test/CodeGen/AArch64/GlobalISel/phi-with-empty-type.ll
Modified:
llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
Removed:
################################################################################
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 8a6bfdc5ee669c..662de0f3fe0e5e 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -3223,6 +3223,8 @@ void IRTranslator::finishPendingPhis() {
#endif // ifndef NDEBUG
for (auto &Phi : PendingPHIs) {
const PHINode *PI = Phi.first;
+ if (PI->getType()->isEmptyTy())
+ continue;
ArrayRef<MachineInstr *> ComponentPHIs = Phi.second;
MachineBasicBlock *PhiMBB = ComponentPHIs[0]->getParent();
EntryBuilder->setDebugLoc(PI->getDebugLoc());
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/phi-with-empty-type.ll b/llvm/test/CodeGen/AArch64/GlobalISel/phi-with-empty-type.ll
new file mode 100644
index 00000000000000..4aaa58e8dab2e0
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/phi-with-empty-type.ll
@@ -0,0 +1,32 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
+; RUN: llc < %s -O0 -global-isel -mtriple=aarch64 -stop-after=irtranslator | FileCheck %s
+
+
+%zero = type [0 x i8]
+
+define %zero @test(%zero %x, %zero %y) {
+ ; CHECK-LABEL: name: test
+ ; CHECK: bb.1.b1:
+ ; CHECK-NEXT: successors: %bb.3(0x40000000), %bb.2(0x40000000)
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: [[DEF:%[0-9]+]]:_(s1) = G_IMPLICIT_DEF
+ ; CHECK-NEXT: G_BRCOND [[DEF]](s1), %bb.3
+ ; CHECK-NEXT: G_BR %bb.2
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: bb.2.b2:
+ ; CHECK-NEXT: successors: %bb.3(0x80000000)
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: G_BR %bb.3
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: bb.3.end:
+ ; CHECK-NEXT: RET_ReallyLR
+b1:
+ br i1 undef, label %end, label %b2
+
+b2:
+ br label %end
+
+end:
+ %z = phi %zero [ %y, %b1 ], [ %x, %b2 ]
+ ret %zero %z
+}
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