[llvm] [RISCV] Add new tests for RISCV zicond extension (PR #143580)

[Ryan Buchner via llvm-commits]

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@@ -0,0 +1,148 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=riscv32 -O2 -verify-machineinstrs -mattr=+b,+zicond < %s | FileCheck %s -check-prefix=RV32ZICOND
+; RUN: llc -mtriple=riscv64 -O2 -verify-machineinstrs -mattr=+b,+zicond < %s | FileCheck %s -check-prefix=RV64ZICOND
+
+define dso_local signext i32 @icmp_and(i64 noundef %0, i64 noundef %1) #0 {
+; RV32ZICOND-LABEL: icmp_and:
+; RV32ZICOND:       # %bb.0:
+; RV32ZICOND-NEXT:    or a2, a2, a3
+; RV32ZICOND-NEXT:    or a0, a0, a1
+; RV32ZICOND-NEXT:    snez a1, a2
+; RV32ZICOND-NEXT:    snez a0, a0
+; RV32ZICOND-NEXT:    and a0, a0, a1
+; RV32ZICOND-NEXT:    ret
+;
+; RV64ZICOND-LABEL: icmp_and:
+; RV64ZICOND:       # %bb.0:
+; RV64ZICOND-NEXT:    snez a1, a1
+; RV64ZICOND-NEXT:    snez a0, a0
+; RV64ZICOND-NEXT:    and a0, a0, a1
+; RV64ZICOND-NEXT:    ret
+  %3 = icmp ne i64 %1, 0
+  %4 = icmp ne i64 %0, 0
+  %5 = and i1 %4, %3
+  %6 = zext i1 %5 to i32
+  ret i32 %6
+}
+
----------------
bababuck wrote:

Do you adding something like:
```
; and (icmp x. 0, ne), (icmp y, 0, ne) -> czero.eqz (icmp x, 0, ne), y
define dso_local signext i32 @icmp_and(i64 noundef %0, i64 noundef %1) #0 {
```

https://github.com/llvm/llvm-project/pull/143580