diff --git a/llvm/test/CodeGen/PowerPC/memintr32.ll b/llvm/test/CodeGen/PowerPC/milicode32.ll
similarity index 57%
rename from llvm/test/CodeGen/PowerPC/memintr32.ll
rename to llvm/test/CodeGen/PowerPC/milicode32.ll
index 4f0a9960a546d..a2af6d413b4bf 100644
--- a/llvm/test/CodeGen/PowerPC/memintr32.ll
+++ b/llvm/test/CodeGen/PowerPC/milicode32.ll
@@ -35,5 +35,37 @@ entry:
 
 declare i32 @memcmp(ptr noundef captures(none), ptr noundef captures(none), i32 noundef) nounwind
 
+define i32 @strlen_test(ptr noundef %str) nounwind {
+; CHECK-AIX-32-P9-LABEL: strlen_test:
+; CHECK-AIX-32-P9:       # %bb.0: # %entry
+; CHECK-AIX-32-P9-NEXT:    mflr r0
+; CHECK-AIX-32-P9-NEXT:    stwu r1, -64(r1)
+; CHECK-AIX-32-P9-NEXT:    stw r0, 72(r1)
+; CHECK-AIX-32-P9-NEXT:    stw r3, 60(r1)
+; CHECK-AIX-32-P9-NEXT:    bl .strlen[PR]
+; CHECK-AIX-32-P9-NEXT:    nop
+; CHECK-AIX-32-P9-NEXT:    addi r1, r1, 64
+; CHECK-AIX-32-P9-NEXT:    lwz r0, 8(r1)
+; CHECK-AIX-32-P9-NEXT:    mtlr r0
+; CHECK-AIX-32-P9-NEXT:    blr
+;
+; CHECK-LINUX32-P9-LABEL: strlen_test:
+; CHECK-LINUX32-P9:       # %bb.0: # %entry
+; CHECK-LINUX32-P9-NEXT:    mflr r0
+; CHECK-LINUX32-P9-NEXT:    stwu r1, -16(r1)
+; CHECK-LINUX32-P9-NEXT:    stw r0, 20(r1)
+; CHECK-LINUX32-P9-NEXT:    stw r3, 12(r1)
+; CHECK-LINUX32-P9-NEXT:    bl strlen
+; CHECK-LINUX32-P9-NEXT:    lwz r0, 20(r1)
+; CHECK-LINUX32-P9-NEXT:    addi r1, r1, 16
+; CHECK-LINUX32-P9-NEXT:    mtlr r0
+; CHECK-LINUX32-P9-NEXT:    blr
+entry:
+  %str.addr = alloca ptr, align 4
+  store ptr %str, ptr %str.addr, align 4
+  %0 = load ptr, ptr %str.addr, align 4
+  %call = call i32 @strlen(ptr noundef %0)
+  ret i32 %call
+}
 
-
+declare i32 @strlen(ptr noundef) nounwind
diff --git a/llvm/test/CodeGen/PowerPC/memintr64.ll b/llvm/test/CodeGen/PowerPC/milicode64.ll
similarity index 58%
rename from llvm/test/CodeGen/PowerPC/memintr64.ll
rename to llvm/test/CodeGen/PowerPC/milicode64.ll
index 0b0e556e89b51..0f0585d9028a9 100644
--- a/llvm/test/CodeGen/PowerPC/memintr64.ll
+++ b/llvm/test/CodeGen/PowerPC/milicode64.ll
@@ -52,4 +52,51 @@ entry:
 
 declare i32 @memcmp(ptr noundef captures(none), ptr noundef captures(none), i64 noundef) nounwind
 
+define i64 @strlen_test(ptr noundef %str) nounwind {
+; CHECK-LE-P9-LABEL: strlen_test:
+; CHECK-LE-P9:       # %bb.0: # %entry
+; CHECK-LE-P9-NEXT:    mflr r0
+; CHECK-LE-P9-NEXT:    stdu r1, -48(r1)
+; CHECK-LE-P9-NEXT:    std r0, 64(r1)
+; CHECK-LE-P9-NEXT:    std r3, 40(r1)
+; CHECK-LE-P9-NEXT:    bl strlen
+; CHECK-LE-P9-NEXT:    nop
+; CHECK-LE-P9-NEXT:    addi r1, r1, 48
+; CHECK-LE-P9-NEXT:    ld r0, 16(r1)
+; CHECK-LE-P9-NEXT:    mtlr r0
+; CHECK-LE-P9-NEXT:    blr
+;
+; CHECK-BE-P9-LABEL: strlen_test:
+; CHECK-BE-P9:       # %bb.0: # %entry
+; CHECK-BE-P9-NEXT:    mflr r0
+; CHECK-BE-P9-NEXT:    stdu r1, -128(r1)
+; CHECK-BE-P9-NEXT:    std r0, 144(r1)
+; CHECK-BE-P9-NEXT:    std r3, 120(r1)
+; CHECK-BE-P9-NEXT:    bl strlen
+; CHECK-BE-P9-NEXT:    nop
+; CHECK-BE-P9-NEXT:    addi r1, r1, 128
+; CHECK-BE-P9-NEXT:    ld r0, 16(r1)
+; CHECK-BE-P9-NEXT:    mtlr r0
+; CHECK-BE-P9-NEXT:    blr
+;
+; CHECK-AIX-64-P9-LABEL: strlen_test:
+; CHECK-AIX-64-P9:       # %bb.0: # %entry
+; CHECK-AIX-64-P9-NEXT:    mflr r0
+; CHECK-AIX-64-P9-NEXT:    stdu r1, -128(r1)
+; CHECK-AIX-64-P9-NEXT:    std r0, 144(r1)
+; CHECK-AIX-64-P9-NEXT:    std r3, 120(r1)
+; CHECK-AIX-64-P9-NEXT:    bl .strlen[PR]
+; CHECK-AIX-64-P9-NEXT:    nop
+; CHECK-AIX-64-P9-NEXT:    addi r1, r1, 128
+; CHECK-AIX-64-P9-NEXT:    ld r0, 16(r1)
+; CHECK-AIX-64-P9-NEXT:    mtlr r0
+; CHECK-AIX-64-P9-NEXT:    blr
+entry:
+  %str.addr = alloca ptr, align 8
+  store ptr %str, ptr %str.addr, align 8
+  %0 = load ptr, ptr %str.addr, align 8
+  %call = call i64 @strlen(ptr noundef %0)
+  ret i64 %call
+}
 
+declare i64 @strlen(ptr noundef) nounwind