SixWeining updated this revision to Diff 471135.
SixWeining added a comment.
Add missing comment.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D136835/new/
https://reviews.llvm.org/D136835
Files:
clang/lib/Basic/Targets/LoongArch.cpp
clang/test/CodeGen/LoongArch/inline-asm-constraints.c
llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
llvm/test/CodeGen/LoongArch/inline-asm-constraint-error.ll
llvm/test/CodeGen/LoongArch/inline-asm-constraint.ll
Index: llvm/test/CodeGen/LoongArch/inline-asm-constraint.ll
===================================================================
--- llvm/test/CodeGen/LoongArch/inline-asm-constraint.ll
+++ llvm/test/CodeGen/LoongArch/inline-asm-constraint.ll
@@ -58,6 +58,17 @@
ret void
}
+define void @constraint_J() nounwind {
+; CHECK-LABEL: constraint_J:
+; CHECK: # %bb.0:
+; CHECK-NEXT: #APP
+; CHECK-NEXT: addi.w $a0, $a0, 0
+; CHECK-NEXT: #NO_APP
+; CHECK-NEXT: ret
+ tail call void asm sideeffect "addi.w $$a0, $$a0, $0", "J"(i32 0)
+ ret void
+}
+
define void @constraint_K() nounwind {
; CHECK-LABEL: constraint_K:
; CHECK: # %bb.0:
Index: llvm/test/CodeGen/LoongArch/inline-asm-constraint-error.ll
===================================================================
--- llvm/test/CodeGen/LoongArch/inline-asm-constraint-error.ll
+++ llvm/test/CodeGen/LoongArch/inline-asm-constraint-error.ll
@@ -17,6 +17,12 @@
ret void
}
+define void @constraint_J() {
+; CHECK: error: value out of range for constraint 'J'
+ tail call void asm sideeffect "addi.w $$a0, $$a0, $$0", "J"(i32 1)
+ ret void
+}
+
define void @constraint_K() {
; CHECK: error: value out of range for constraint 'K'
tail call void asm sideeffect "andi.w $$a0, $$a0, $0", "K"(i32 4096)
Index: llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
===================================================================
--- llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
+++ llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
@@ -2155,6 +2155,7 @@
// offset that is suitable for use in instructions with the same
// addressing mode as st.w and ld.w.
// 'I': A signed 12-bit constant (for arithmetic instructions).
+ // 'J': Integer zero.
// 'K': An unsigned 12-bit constant (for logic instructions).
// "ZB": An address that is held in a general-purpose register. The offset is
// zero.
@@ -2169,6 +2170,7 @@
return C_RegisterClass;
case 'l':
case 'I':
+ case 'J':
case 'K':
return C_Immediate;
case 'k':
@@ -2272,6 +2274,13 @@
DAG.getTargetConstant(CVal, SDLoc(Op), Subtarget.getGRLenVT()));
}
return;
+ case 'J':
+ // Validate & create an integer zero operand.
+ if (auto *C = dyn_cast<ConstantSDNode>(Op))
+ if (C->getZExtValue() == 0)
+ Ops.push_back(
+ DAG.getTargetConstant(0, SDLoc(Op), Subtarget.getGRLenVT()));
+ return;
case 'K':
// Validate & create a 12-bit unsigned immediate operand.
if (auto *C = dyn_cast<ConstantSDNode>(Op)) {
Index: clang/test/CodeGen/LoongArch/inline-asm-constraints.c
===================================================================
--- clang/test/CodeGen/LoongArch/inline-asm-constraints.c
+++ clang/test/CodeGen/LoongArch/inline-asm-constraints.c
@@ -43,6 +43,12 @@
asm volatile ("" :: "I"(-2048));
}
+void test_J(void) {
+// CHECK-LABEL: define{{.*}} void @test_J()
+// CHECK: call void asm sideeffect "", "J"(i32 0)
+ asm volatile ("" :: "J"(0));
+}
+
void test_K(void) {
// CHECK-LABEL: define{{.*}} void @test_K()
// CHECK: call void asm sideeffect "", "K"(i32 4095)
Index: clang/lib/Basic/Targets/LoongArch.cpp
===================================================================
--- clang/lib/Basic/Targets/LoongArch.cpp
+++ clang/lib/Basic/Targets/LoongArch.cpp
@@ -88,6 +88,10 @@
// A signed 12-bit constant (for arithmetic instructions).
Info.setRequiresImmediate(-2048, 2047);
return true;
+ case 'J':
+ // Integer zero.
+ Info.setRequiresImmediate(0);
+ return true;
case 'K':
// An unsigned 12-bit constant (for logic instructions).
Info.setRequiresImmediate(0, 4095);
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