precommit test case

Author: michaelmaitland

llvm/test/CodeGen/RISCV/branch_zero.ll

@@ -83,3 +83,4 @@ exit1:
 if.then:
   br label %for.body
 }
+

llvm/test/CodeGen/RISCV/simplify-condbr.ll

@@ -0,0 +1,108 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
+; RUN:   | FileCheck %s
+
+; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
+declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0
+
+declare fastcc i1 @S_reginclass()
+
+define fastcc i32 @S_regrepeat(ptr %startposp, i32 %max, i8 %0, i1 %cmp343) nounwind {
+; CHECK-LABEL: S_regrepeat:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    addi sp, sp, -32
+; CHECK-NEXT:    sd ra, 24(sp) # 8-byte Folded Spill
+; CHECK-NEXT:    sd s0, 16(sp) # 8-byte Folded Spill
+; CHECK-NEXT:    sd s1, 8(sp) # 8-byte Folded Spill
+; CHECK-NEXT:    sd s2, 0(sp) # 8-byte Folded Spill
+; CHECK-NEXT:    andi a2, a2, 255
+; CHECK-NEXT:    addi a4, a2, -19
+; CHECK-NEXT:    li a5, 2
+; CHECK-NEXT:    mv a0, a1
+; CHECK-NEXT:    bltu a4, a5, .LBB0_4
+; CHECK-NEXT:  # %bb.1: # %entry
+; CHECK-NEXT:    li a1, 1
+; CHECK-NEXT:    bltu a1, a2, .LBB0_8
+; CHECK-NEXT:  # %bb.2: # %do_exactf
+; CHECK-NEXT:    andi a3, a3, 1
+; CHECK-NEXT:    beqz a3, .LBB0_10
+; CHECK-NEXT:  # %bb.3: # %land.rhs251
+; CHECK-NEXT:    lw zero, 0(zero)
+; CHECK-NEXT:    li s0, 1
+; CHECK-NEXT:    bnez s0, .LBB0_9
+; CHECK-NEXT:    j .LBB0_8
+; CHECK-NEXT:  .LBB0_4: # %sw.bb336
+; CHECK-NEXT:    mv s1, a0
+; CHECK-NEXT:    li s0, 0
+; CHECK-NEXT:    andi s2, a3, 1
+; CHECK-NEXT:  .LBB0_5: # %land.rhs345
+; CHECK-NEXT:    # =>This Inner Loop Header: Depth=1
+; CHECK-NEXT:    call S_reginclass
+; CHECK-NEXT:    andi a0, a0, 1
+; CHECK-NEXT:    beqz a0, .LBB0_7
+; CHECK-NEXT:  # %bb.6: # %while.body350
+; CHECK-NEXT:    # in Loop: Header=BB0_5 Depth=1
+; CHECK-NEXT:    addiw s0, s0, 1
+; CHECK-NEXT:    bnez s2, .LBB0_5
+; CHECK-NEXT:    j .LBB0_8
+; CHECK-NEXT:  .LBB0_7:
+; CHECK-NEXT:    mv a0, s1
+; CHECK-NEXT:    bnez s0, .LBB0_9
+; CHECK-NEXT:  .LBB0_8: # %if.else1492
+; CHECK-NEXT:    li a0, 0
+; CHECK-NEXT:  .LBB0_9: # %if.end1497
+; CHECK-NEXT:    ld ra, 24(sp) # 8-byte Folded Reload
+; CHECK-NEXT:    ld s0, 16(sp) # 8-byte Folded Reload
+; CHECK-NEXT:    ld s1, 8(sp) # 8-byte Folded Reload
+; CHECK-NEXT:    ld s2, 0(sp) # 8-byte Folded Reload
+; CHECK-NEXT:    addi sp, sp, 32
+; CHECK-NEXT:    ret
+; CHECK-NEXT:  .LBB0_10:
+; CHECK-NEXT:    bnez zero, .LBB0_9
+; CHECK-NEXT:    j .LBB0_8
+entry:
+  switch i8 %0, label %if.else1492 [
+    i8 19, label %sw.bb336
+    i8 20, label %sw.bb336
+    i8 1, label %do_exactf
+    i8 0, label %do_exactf
+  ]
+
+do_exactf:                                        ; preds = %entry, %entry
+  br i1 %cmp343, label %land.rhs251, label %if.end334
+
+land.rhs251:                                      ; preds = %do_exactf
+  %bcmp414 = load volatile i32, ptr null, align 4
+  br label %if.end334
+
+if.end334:                                        ; preds = %land.rhs251, %do_exactf
+  %hardcount.7 = phi i32 [ 0, %do_exactf ], [ 1, %land.rhs251 ]
+  call void @llvm.lifetime.end.p0(i64 0, ptr null)
+  br label %sw.epilog1489
+
+sw.bb336:                                         ; preds = %entry, %entry
+  br label %land.rhs345
+
+land.rhs345:                                      ; preds = %while.body350, %sw.bb336
+  %hardcount.8634 = phi i32 [ %inc356, %while.body350 ], [ 0, %sw.bb336 ]
+  %call347 = call fastcc i1 @S_reginclass()
+  br i1 %call347, label %while.body350, label %sw.epilog1489
+
+while.body350:                                    ; preds = %land.rhs345
+  %inc356 = add i32 %hardcount.8634, 1
+  br i1 %cmp343, label %land.rhs345, label %if.end1497
+
+sw.epilog1489:                                    ; preds = %land.rhs345, %if.end334
+  %hardcount.20 = phi i32 [ %hardcount.7, %if.end334 ], [ %hardcount.8634, %land.rhs345 ]
+  %tobool1490.not = icmp eq i32 %hardcount.20, 0
+  br i1 %tobool1490.not, label %if.else1492, label %if.end1497
+
+if.else1492:                                      ; preds = %sw.epilog1489, %entry
+  br label %if.end1497
+
+if.end1497:                                       ; preds = %if.else1492, %sw.epilog1489, %while.body350
+  %c.0 = phi i32 [ 0, %if.else1492 ], [ %max, %sw.epilog1489 ], [ 0, %while.body350 ]
+  ret i32 %c.0
+}
+
+attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }