diff --git a/flang/test/HLFIR/unroll-loops.fir b/flang/test/HLFIR/unroll-loops.fir
index 83b30d4d72693..d8f820263ffd0 100644
--- a/flang/test/HLFIR/unroll-loops.fir
+++ b/flang/test/HLFIR/unroll-loops.fir
@@ -3,6 +3,9 @@
 // RUN: %flang_fc1 -emit-llvm -O1 -fno-unroll-loops -mllvm -force-vector-width=2 -o- %s | FileCheck %s --check-prefixes=CHECK,NO-UNROLL
 // RUN: %flang_fc1 -emit-llvm -O1 -mllvm -force-vector-width=2 -o- %s | FileCheck %s --check-prefixes=CHECK,NO-UNROLL
 
+// FIXME: https://github.com/llvm/llvm-project/issues/123668
+// XFAIL: powerpc64-target-arch
+
 // CHECK-LABEL: @unroll
 // CHECK-SAME: (ptr nocapture writeonly %[[ARG0:.*]])
 func.func @unroll(%arg0: !fir.ref<!fir.array<1000 x index>> {fir.bindc_name = "a"}) {
diff --git a/flang/test/Integration/unroll-loops.f90 b/flang/test/Integration/unroll-loops.f90
index 939c96e150690..4a356c1ec5e9a 100644
--- a/flang/test/Integration/unroll-loops.f90
+++ b/flang/test/Integration/unroll-loops.f90
@@ -3,6 +3,9 @@
 ! RUN: %flang_fc1 -emit-llvm -O1 -fno-unroll-loops -mllvm -force-vector-width=2 -o- %s | FileCheck %s --check-prefixes=CHECK,NO-UNROLL
 ! RUN: %flang_fc1 -emit-llvm -O1 -mllvm -force-vector-width=2 -o- %s | FileCheck %s --check-prefixes=CHECK,NO-UNROLL
 
+! FIXME: https://github.com/llvm/llvm-project/issues/123668
+! XFAIL: powerpc64-target-arch
+
 ! CHECK-LABEL: @unroll
 ! CHECK-SAME: (ptr nocapture writeonly %[[ARG0:.*]])
 subroutine unroll(a)