[RISCV] Add additional mul strength reduction coverage with xtheadba

Author: preames

llvm/test/CodeGen/RISCV/rv64xtheadba.ll

@@ -252,6 +252,183 @@ define i64 @addmul72(i64 %a, i64 %b) {
   ret i64 %d
 }
 
+define i64 @mul11(i64 %a) {
+; RV64I-LABEL: mul11:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 11
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul11:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 2
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 1
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 11
+  ret i64 %c
+}
+
+define i64 @mul19(i64 %a) {
+; RV64I-LABEL: mul19:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 19
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul19:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 3
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 1
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 19
+  ret i64 %c
+}
+
+define i64 @mul13(i64 %a) {
+; RV64I-LABEL: mul13:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 13
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul13:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 1
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 2
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 13
+  ret i64 %c
+}
+
+define i64 @mul21(i64 %a) {
+; RV64I-LABEL: mul21:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 21
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul21:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 2
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 2
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 21
+  ret i64 %c
+}
+
+define i64 @mul37(i64 %a) {
+; RV64I-LABEL: mul37:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 37
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul37:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 3
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 2
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 37
+  ret i64 %c
+}
+
+define i64 @mul25(i64 %a) {
+; RV64I-LABEL: mul25:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 25
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul25:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 2
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 2
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 25
+  ret i64 %c
+}
+
+define i64 @mul41(i64 %a) {
+; RV64I-LABEL: mul41:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 41
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul41:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 2
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 3
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 41
+  ret i64 %c
+}
+
+define i64 @mul73(i64 %a) {
+; RV64I-LABEL: mul73:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 73
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul73:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a1, a0, a0, 3
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a1, 3
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 73
+  ret i64 %c
+}
+
+define i64 @mul27(i64 %a) {
+; RV64I-LABEL: mul27:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 27
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul27:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 3
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 1
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 27
+  ret i64 %c
+}
+
+define i64 @mul45(i64 %a) {
+; RV64I-LABEL: mul45:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 45
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul45:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 3
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 2
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 45
+  ret i64 %c
+}
+
+define i64 @mul81(i64 %a) {
+; RV64I-LABEL: mul81:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    li a1, 81
+; RV64I-NEXT:    mul a0, a0, a1
+; RV64I-NEXT:    ret
+;
+; RV64XTHEADBA-LABEL: mul81:
+; RV64XTHEADBA:       # %bb.0:
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 3
+; RV64XTHEADBA-NEXT:    th.addsl a0, a0, a0, 3
+; RV64XTHEADBA-NEXT:    ret
+  %c = mul i64 %a, 81
+  ret i64 %c
+}
+
+
 define i64 @mul96(i64 %a) {
 ; RV64I-LABEL: mul96:
 ; RV64I:       # %bb.0: