[ppc] add tests to show potential andc optimization

llvm-svn: 266261

diff --git a/llvm/test/CodeGen/PowerPC/andc.ll b/llvm/test/CodeGen/PowerPC/andc.ll
new file mode 100644 (file)
index 0000000..8b8eca6
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/andc.ll
@@ -0,0 +1,36 @@
+; RUN: llc < %s -mtriple=powerpc64-apple-darwin | FileCheck %s
+
+; TODO: These could use 'andc'.
+
+define i1 @and_cmp1(i32 %x, i32 %y) {
+; CHECK-LABEL: and_cmp1:
+; CHECK:       ; BB#0:
+; CHECK-NEXT:    and r2, r3, r4
+; CHECK-NEXT:    li r3, 1
+; CHECK-NEXT:    cmpw cr0, r2, r4
+; CHECK-NEXT:    bclr 12, 2, 0
+; CHECK-NEXT:  ; BB#1:
+; CHECK-NEXT:    li r3, 0
+; CHECK-NEXT:    blr
+;
+  %and = and i32 %x, %y
+  %cmp = icmp eq i32 %and, %y
+  ret i1 %cmp
+}
+
+define i1 @and_cmp_const(i32 %x) {
+; CHECK-LABEL: and_cmp_const:
+; CHECK:       ; BB#0:
+; CHECK-NEXT:    andi. r2, r3, 43
+; CHECK-NEXT:    li r3, 1
+; CHECK-NEXT:    cmpwi r2, 43
+; CHECK-NEXT:    bclr 12, 2, 0
+; CHECK-NEXT:  ; BB#1:
+; CHECK-NEXT:    li r3, 0
+; CHECK-NEXT:    blr
+;
+  %and = and i32 %x, 43
+  %cmp = icmp eq i32 %and, 43
+  ret i1 %cmp
+}
+