diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
index 6af22d0c378..9a18ef33ded 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
@@ -2208,8 +2208,10 @@ lp_build_sample_common(struct lp_build_sample_context *bld,
     */
    switch (mip_filter) {
    default:
-      assert(0 && "bad mip_filter value in lp_build_sample_soa()");
+      debug_assert(0 && "bad mip_filter value in lp_build_sample_soa()");
+#if defined(NDEBUG) || defined(DEBUG)
       FALLTHROUGH;
+#endif
    case PIPE_TEX_MIPFILTER_NONE:
       /* always use mip level 0 */
       first_level = bld->dynamic_state->first_level(bld->dynamic_state,
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c b/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c
index 875271883e1..ea2ec780f16 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c
@@ -408,7 +408,9 @@ lp_build_swizzle_aos(struct lp_build_context *bld,
             switch (swizzles[i]) {
             default:
                assert(0);
+#if defined(NDEBUG) || defined(DEBUG)
                FALLTHROUGH;
+#endif
             case PIPE_SWIZZLE_X:
             case PIPE_SWIZZLE_Y:
             case PIPE_SWIZZLE_Z:
diff --git a/src/gallium/drivers/freedreno/freedreno_util.h b/src/gallium/drivers/freedreno/freedreno_util.h
index dd7658bee18..064987265c2 100644
--- a/src/gallium/drivers/freedreno/freedreno_util.h
+++ b/src/gallium/drivers/freedreno/freedreno_util.h
@@ -426,7 +426,9 @@ fd_msaa_samples(unsigned samples)
    switch (samples) {
    default:
       debug_assert(0);
+#if defined(NDEBUG) || defined(DEBUG)
       FALLTHROUGH;
+#endif
    case 0:
    case 1:
       return MSAA_ONE;
diff --git a/src/gallium/frontends/vdpau/vdpau_private.h b/src/gallium/frontends/vdpau/vdpau_private.h
index 68523e3214a..7e77aa354bc 100644
--- a/src/gallium/frontends/vdpau/vdpau_private.h
+++ b/src/gallium/frontends/vdpau/vdpau_private.h
@@ -144,8 +144,10 @@ FormatYCBCRToPipe(VdpYCbCrFormat vdpau_format)
 #endif
       default:
          /* NOTE: Can't be "unreachable", as it's quite reachable. */
-         assert(!"unexpected VdpYCbCrFormat");
+         debug_assert(!"unexpected VdpYCbCrFormat");
+#if defined(NDEBUG) || defined(DEBUG)
          FALLTHROUGH;
+#endif
 #ifdef VDP_YCBCR_FORMAT_Y_UV_444
       case VDP_YCBCR_FORMAT_Y_UV_444:
 #endif
diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index 1327fb56f90..d63628fcd87 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -184,7 +184,9 @@ st_gl_texture_dims_to_pipe_dims(GLenum texture,
       break;
    default:
       assert(0 && "Unexpected texture in st_gl_texture_dims_to_pipe_dims()");
+#if defined(NDEBUG) || defined(DEBUG)
       FALLTHROUGH;
+#endif
    case GL_TEXTURE_3D:
    case GL_PROXY_TEXTURE_3D:
       *widthOut = widthIn;