diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
@@ -1348,6 +1348,28 @@
 def : InstAlias<"ret", (JIRL R0, R1, 0)>;
 def : InstAlias<"jr $rj", (JIRL R0, GPR:$rj, 0)>;
 
+// Branches implemented with alias.
+// Always output the canonical mnemonic for the pseudo branch instructions.
+// The GNU tools emit the canonical mnemonic for the branch pseudo instructions
+// as well (e.g. "bgt" will be recognised by the assembler but never printed by
+// objdump). Match this behaviour by setting a zero weight.
+def : InstAlias<"bgt $rj, $rd, $imm16",
+                (BLT GPR:$rd, GPR:$rj, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"bgtu $rj, $rd, $imm16",
+                (BLTU GPR:$rd, GPR:$rj, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"ble $rj, $rd, $imm16",
+                (BGE GPR:$rd, GPR:$rj, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"bleu $rj, $rd, $imm16",
+                (BGEU GPR:$rd, GPR:$rj, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"bltz $rd, $imm16",
+                (BLT GPR:$rd, R0, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"bgtz $rj, $imm16",
+                (BLT R0, GPR:$rj, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"blez $rj, $imm16",
+                (BGE R0, GPR:$rj, simm16_lsl2_br:$imm16), 0>;
+def : InstAlias<"bgez $rd, $imm16",
+                (BGE GPR:$rd, R0, simm16_lsl2_br:$imm16), 0>;
+
 //===----------------------------------------------------------------------===//
 // Basic Floating-Point Instructions
 //===----------------------------------------------------------------------===//
diff --git a/llvm/test/MC/LoongArch/Macros/aliases-br.s b/llvm/test/MC/LoongArch/Macros/aliases-br.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/LoongArch/Macros/aliases-br.s
@@ -0,0 +1,18 @@
+# RUN: llvm-mc --triple=loongarch64 %s | FileCheck %s
+
+bgt   $a1, $a0, 16
+# CHECK:      blt     $a0, $a1, 16
+bgtu  $a1, $a0, 16
+# CHECK-NEXT: bltu    $a0, $a1, 16
+ble   $a1, $a0, 16
+# CHECK-NEXT: bge     $a0, $a1, 16
+bleu  $a1, $a0, 16
+# CHECK-NEXT: bgeu    $a0, $a1, 16
+bltz   $a0, 16
+# CHECK-NEXT: blt     $a0, $zero, 16
+bgtz   $a0, 16
+# CHECK-NEXT: blt     $zero, $a0, 16
+blez   $a0, 16
+# CHECK-NEXT: bge     $zero, $a0, 16
+bgez   $a0, 16
+# CHECK-NEXT: bge     $a0, $zero, 16